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Symmetric Key and Public Key Encryption
 
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Modern day encryption is performed in two different ways. Check out http://YouTube.com/ITFreeTraining or http://itfreetraining.com for more of our always free training videos. Using the same key or using a pair of keys called the public and private keys. This video looks at how these systems work and how they can be used together to perform encryption. Download the PDF handout http://itfreetraining.com/Handouts/Ce... Encryption Types Encryption is the process of scrambling data so it cannot be read without a decryption key. Encryption prevents data being read by a 3rd party if it is intercepted by a 3rd party. The two encryption methods that are used today are symmetric and public key encryption. Symmetric Key Symmetric key encryption uses the same key to encrypt data as decrypt data. This is generally quite fast when compared with public key encryption. In order to protect the data, the key needs to be secured. If a 3rd party was able to gain access to the key, they could decrypt any data that was encrypt with that data. For this reason, a secure channel is required to transfer the key if you need to transfer data between two points. For example, if you encrypted data on a CD and mail it to another party, the key must also be transferred to the second party so that they can decrypt the data. This is often done using e-mail or the telephone. In a lot of cases, sending the data using one method and the key using another method is enough to protect the data as an attacker would need to get both in order to decrypt the data. Public Key Encryption This method of encryption uses two keys. One key is used to encrypt data and the other key is used to decrypt data. The advantage of this is that the public key can be downloaded by anyone. Anyone with the public key can encrypt data that can only be decrypted using a private key. This means the public key does not need to be secured. The private key does need to be keep in a safe place. The advantage of using such a system is the private key is not required by the other party to perform encryption. Since the private key does not need to be transferred to the second party there is no risk of the private key being intercepted by a 3rd party. Public Key encryption is slower when compared with symmetric key so it is not always suitable for every application. The math used is complex but to put it simply it uses the modulus or remainder operator. For example, if you wanted to solve X mod 5 = 2, the possible solutions would be 2, 7, 12 and so on. The private key provides additional information which allows the problem to be solved easily. The math is more complex and uses much larger numbers than this but basically public and private key encryption rely on the modulus operator to work. Combing The Two There are two reasons you want to combine the two. The first is that often communication will be broken into two steps. Key exchange and data exchange. For key exchange, to protect the key used in data exchange it is often encrypted using public key encryption. Although slower than symmetric key encryption, this method ensures the key cannot accessed by a 3rd party while being transferred. Since the key has been transferred using a secure channel, a symmetric key can be used for data exchange. In some cases, data exchange may be done using public key encryption. If this is the case, often the data exchange will be done using a small key size to reduce the processing time. The second reason that both may be used is when a symmetric key is used and the key needs to be provided to multiple users. For example, if you are using encryption file system (EFS) this allows multiple users to access the same file, which includes recovery users. In order to make this possible, multiple copies of the same key are stored in the file and protected from being read by encrypting it with the public key of each user that requires access. References "Public-key cryptography" http://en.wikipedia.org/wiki/Public-k... "Encryption" http://en.wikipedia.org/wiki/Encryption
Views: 452929 itfreetraining
Polyalphabetic cipher | Journey into cryptography | Computer Science | Khan Academy
 
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Brit introduces the polyalphabetic cipher, which creates a lighter fingerprint than the Caesar cipher. Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/one-time-pad?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/caesar-cipher?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Computer Science on Khan Academy: Learn select topics from computer science - algorithms (how we solve common problems in computer science and measure the efficiency of our solutions), cryptography (how we protect secret information), and information theory (how we encode and compress information). About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit www.khanacademy.org, join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Computer Science channel: https://www.youtube.com/channel/UC8uHgAVBOy5h1fDsjQghWCw?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 430978 Khan Academy
On the Power of Public-key Encryption in Secure Computation
 
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Eleventh IACR Theory of Cryptography Conference TCC 2014 February 24-26, 2014 Mohammad Mahmoody and Hemanta K. Maji and Manoj Prabhakaran
Views: 121 Calit2ube
Cryptography Fundamentals: Creating or Generating Keys
 
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This video is a sample from Skillsoft's video course catalog. After watching it, you will be able to describe the creating, or generating, of keys and how the key strength is critical to cryptographic ciphers. Dan Lachance has worked in various IT roles since 1993 including as a technical trainer with Global Knowledge, programmer, consultant, as well as an IT tech author and editor for McGraw-Hill and Wiley Publishing. He has held and still holds IT certifications in Linux, Novell, Lotus, CompTIA, and Microsoft. His specialties over the years have included networking, IT security, cloud solutions, Linux management, and configuration and troubleshooting across a wide array of Microsoft products. Skillsoft is a pioneer in the field of learning with a long history of innovation. Skillsoft provides cloud-based learning solutions for our customers worldwide, who range from global enterprises, government and education customers to mid-sized and small businesses. Learn more at http://www.skillsoft.com. https://www.linkedin.com/company/skillsoft http://www.twitter.com/skillsoft https://www.facebook.com/skillsoft
Views: 288 Skillsoft YouTube
Lattice Based Fully Dynamic Multi Key FHE with Short Ciphertexts
 
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Zvika Brakerski and Renen Perlman, Crypto 2016. See http://www.iacr.org/cryptodb/data/paper.php?pubkey=27676
Views: 264 TheIACR
Fully Homomoorphic Encryption - Shai Halevi
 
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Shai Halevi, IBM Research: Fully homomoorphic encryption. http://www1.biu.ac.il/indexE.php
Views: 3477 barilanuniversity
Multi-Party Computation: From Theory to Practice
 
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In the last couple of years amazing advances have been made on techniques to perform computation on encrypted data. Some of the techniques are even becoming practical. In this talk I will show a novel technique which utilizes techniques used in Fully Homomorphic Encryption (FHE) schemes to provide efficiency improvements in Multi-Party Computation (MPC) protocols.
Views: 1034 Microsoft Research
CISSP #40 - Domain 3 - Cryptography History and Goals
 
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Domain 3: Security Engineering
How space-time codes work (MIMO)
 
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A brief history of wireless communication (radio) leading to the idea of multiple-antenna wireless systems (MIMO) and space-time codes. This video was produced with IEEE Information Theory Society. Written by: Brit Cruise Matthieu Bloch Michelle Effros (corrected from video) Suhas Diggavi (corrected from video)
Views: 13028 Art of the Problem
Winter School on Secure Computation and Efficiency
 
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Winter School on Secure Computation and Efficiency. Prof. Yehuda Lindell. Background and definitions. Department of Computer Science . Bar-Ilan: http://www1.biu.ac.il/indexE.php Why Bar-Ilan: http://www1.biu.ac.il/indexE.php?id=6382&pt=1&pid=30&level=2&cPath=6382 Department of Computer Science: http://www.cs.biu.ac.il/
Views: 2547 barilanuniversity
Ep.1 – Cryptographic Algorithms & Multiparty Computation (MPC) | Ask the Professor
 
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Prof. Nigel answers some fundamental questions about the mathematical guarantees of cryptographic algorithms, explains how Multiparty Computation (MPC) works, and most importantly, why he became a cryptographer in the first place. In the 'Ask the Professor' video series, Professor Nigel Smart, world-renowned expert in applied cryptography, Vice President of the International Association of Cryptologic Research and Professor of Cryptography in Department of Computer Science at University of Bristol, answers the internet's' most interesting questions about cryptography. Based on questions from popular blogs, forums, and social media—this series is relevant for both beginners and advanced crypto enthusiasts alike. Brought to you by Unbound Tech (https://www.unboundtech.com/) world leader in software defined cryptography, has developed a unique technology that combines both the high usability of software with the strong security guarantees that were previously only available through dedicated hardware. This technology is based on decades of research by two of the world’s leading cryptographers who founded Unbound Tech in 2014 together with a team of applied crypto experts.
Views: 571 Unbound Tech
A Theory of Cryptographic Complexity - Manoj M. Prabhakaran
 
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Manoj M. Prabhakaran University of Illinois at Urbana-Champaign March 1, 2010 In this talk, I shall describe an ongoing project to develop a complexity theory for cryptographic (multi-party computations. Different kinds of cryptographic computations involve different constraints on how information is accessed. Our goal is to qualitatively -- and if possible, quantitatively -- characterize the "cryptographic complexity" (defined using appropriate notions of reductions) of these different modes of accessing information. Also, we explore the relationship between such cryptographic complexity and computational intractability. Our first set of results considers cryptographic complexity with no reference to computational complexity aspects. We identify several cryptographic complexity classes, with the help of new reductions (protocols) as well as new separations (impossibility results), revealing a rich structure in the universe of cryptographic tasks. We also develop an information-theoretic measure to quantify the cryptographic content of correlated random variables distributed between two parties. Our second set of results explores the connection between computational intractability and cryptographic complexity. Our results suggest that there are only a few distinct intractability assumptions that are necessary and sufficient for all the infinitely many reductions among cryptographic tasks. In deriving these results, again, we provide new protocols as well as separation results. Significantly, this approach of defining the universe of intractability requirements in terms of cryptographic tasks (rather than using specific assumptions formulated for proving the security of specific contructions) gives a possibly finite set of computational complexity assumptions to study, corresponding to a finite set of worlds between "Minicrypt" and "Cryptomania." The main open problem we pose is to identify the set of all intractability assumptions that appear in this way. These results are mostly based on joint work with Hemanta Maji and Mike Rosulek; if time permits I will mention on going works that also involve Mohammad Mahmoody-Ghidary, Pichayoot Ouppaphan, Vinod Prabhakaran and Amit Sahai. For more videos, visit http://video.ias.edu
Introduction to Public Key Cryptography   Public Key Cryptography animation
 
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In this playlist you will learn about the following topics Protocols, Layered Model Network components Uses of networks Traceroute and socket API Protocols and layering Reference models (Internet, OSI) History of the internet Physical and Direct Link Layer Simple link models (latency, bandwidth-delay product) Media and signals Modulation schemes (baseband, passband) Fundamental limits (Shannon) Framing Error detection schemes (checksum, CRC) Error correction schemes (Hamming) Retransmissions, Multiple access, Switching Retransmissions (ARQ) Multiplexing schemes (TDM. FDM) Random access / Ethernet (CSMA family) Wireless access / 802.11 Contention-free access / Token Ring LAN switching (switches vs. hubs, spanning tree, backward learning) Network Layer and Internetworking Datagram and virtual circuit models (IP, MPLS) IP addressing and forwarding (prefixes, longest matching prefix) IP helpers: ARP, DHCP Internetworking (fragmentation, path MTU discovery, ICMP) IPv4 and IPv6 Network Address Translation (NAT) Routing Shortest cost routing model Dijkstra's algorithm Flooding Distance Vector and Link-state Equal-cost multi-path routing Hierarchical routing (prefixes, aggregation, subnets) Multiple parties and policy (BGP) Transport Layer, Reliable Transport Sockets, ports and service APIs Reliable and unreliable delivery (TCP, UDP) Connection establishment and teardown Flow control and sliding windows Retransmission timeouts Congestion Control Fairness and Efficiency Additive Increase Multiplicative Decrease (AIMD) TCP congestion control (slow start, fast retransmission and recovery) Congestion avoidance (ECN) Web and Content Distribution Naming (DNS) Web protocols (HTTP, caching) Content Distribution Networks (CDNs) Peer-to-Peer (BitTorrent) Quality of Service and Real-Time Apps Streaming media and Conferencing Scheduling disciplines (FIFO, WFQ) Traffic shaping with Token Buckets Differentiated Services Rate and Delay Guarantees Optional: Network Security Encryption for Confidentiality and Authenticity Web security (SSL, DNSSEC) Wireless security (802.11i) Firewalls and Virtual Private Networks (VPNs) Distributed Denial of Service (DDOS) Computer Networks 1 OSI Model in Networking OSI model layers and their function (L1) 2 IP Address Basics: Classful Addressing dotted decimal notation 3 IP Address: Network ID and Host ID Network Mask 4 IP Address Subnet Supernet subnetmask 5 Classless IP Addressing: Subnet Mask, subnet block size, network address 6 Block Allocation of IP address Create subnets from block of IP address 7 Introduction to Interconnecting Devices: REPEATERS HUBS BRIDGE SWITCHES ROUTERS 8 VLAN: Virtual Lan concepts VLAN TRUNK and Switches 9 Address Resolution Protocol (ARP) and Reverse ARP explained Animated 10 Medium Access Control: Aloha and Slotted Aloha Protocol 11 Carrier Sense Multiple Access Protocol CSMA 12 CSMA/CD (Carrier Sense Multiple Access/ Collision Detection) 13 Network Address Translation (NAT) 14 Dynamic Host Configuration Protocol (DHCP) 15 Circuit Switching vs Packet Switching 16 Virtual Circuit Network Virtual Circuit switching 17 Domain Name Server (DNS) Name Server DNS how dns works 18 Internet Control Message Protocol (ICMP) ICMP protocol tutorial part 1 19 Internet Control Message Protocol (ICMP) : Error Message (Part 2) 20 Stop and Wait Protocol Stop and Wair ARQ Stop and Wait Flow control 21 GO BACK N ARQ Protocol Go back N sliding window 22 SELECTIVE REPEAT ARQ selective repeat sliding window protocol 23 Authentication Protocol Man In Middle Attack Replay Attack Nonce 24 Introduction to Public Key Cryptography Public Key Cryptography animation 25 Introduction to Digital Signature Public Key cryptography 26 RSA Algorithm and public key encryption rivest shamir adleman algorithm 27 Message Digest and Digital Signature Cryptographic Hash Function 28 Certification Authority (CA) Digital Certificate 29 Secure EMail How To Public Private Key Encryption Secure E-Mail PGP
Views: 2 Vijay S
Visual Cryptography
 
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Hiding your images in style since 1994. Copyright Protection Scheme for Digital Images Using Visual Cryptography and Sampling Methods Ching-Sheng Hsu Young-Chang Hou July 2005 RIT, IMGS-362 Image Processing & Computer Vision II
Views: 25920 Matt Donato
Cryptography  PRG Security Definitions
 
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Cryptography PRG Security Definitions To get certificate subscribe: https://www.coursera.org/learn/crypto Playlist URL: https://www.youtube.com/playlist?list=PL2jykFOD1AWYosqucluZghEVjUkopdD1e About this course: Cryptography is an indispensable tool for protecting information in computer systems. In this course you will learn the inner workings of cryptographic systems and how to correctly use them in real-world applications. The course begins with a detailed discussion of how two parties who have a shared secret key can communicate securely when a powerful adversary eavesdrops and tampers with traffic. We will examine many deployed protocols and analyze mistakes in existing systems. The second half of the course discusses public-key techniques that let two parties generate a shared secret key.
Views: 264 intrigano
Bitcoin Q&A: Public keys vs. addresses
 
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What is the difference between public keys and addresses? How are new addresses generated? How are change addresses generated? Why have two outputs? Do you still pay fees if you are sending bitcoin to new addresses in your own wallet? What is the VanityGen command? What does the SIG_HASH flag do? More from 'Mastering Bitcoin': https://github.com/bitcoinbook/bitcoinbook/blob/f8b883dcd4e3d1b9adf40fed59b7e898fbd9241f/ch04.asciidoc These questions are from the MOOC 9.3 and 9.5 sessions which took place on March 2nd and March 16th, 2018 respectively. Andreas is a teaching fellow with the University of Nicosia. The first course in their Master of Science in Digital Currency degree, DFIN-511: Introduction to Digital Currencies, is offered for free as an open enrollment MOOC course to anyone interested in learning about the fundamental principles. If you want early-access to talks and a chance to participate in the monthly live Q&As with Andreas, become a patron: https://www.patreon.com/aantonop RELATED: Advanced Bitcoin Scripting Part 1: Transactions and Multi-sig - https://youtu.be/8FeAXjkmDcQ Advanced Bitcoin Scripting Part 2: SegWit, Consensus, and Trustware - https://youtu.be/pQbeBduVQ4I Reusing addresses - https://youtu.be/4A3urPFkx8g Airdrop coins and privacy implications - https://youtu.be/JHRnqJJ0rhc Wealth distribution statistics - https://youtu.be/X2Qsz4eaSPY Mixing services - https://youtu.be/rKoMvOH4zoY How do mnemonic seeds work? - https://youtu.be/wWCIQFNf_8g Using paper wallets - https://youtu.be/cKehFazo8Pw What is Segregated Witness? - https://youtu.be/dtOjjB4mD8k Spam transactions and Child Pays For Parent (CPFP) - https://youtu.be/t3c0E4fkSNs Andreas M. Antonopoulos is a technologist and serial entrepreneur who has become one of the most well-known and respected figures in bitcoin. Follow on Twitter: @aantonop https://twitter.com/aantonop Website: https://antonopoulos.com/ He is the author of two books: “Mastering Bitcoin,” published by O’Reilly Media and considered the best technical guide to bitcoin; “The Internet of Money,” a book about why bitcoin matters. THE INTERNET OF MONEY, v1: https://www.amazon.co.uk/Internet-Money-collection-Andreas-Antonopoulos/dp/1537000454/ref=asap_bc?ie=UTF8 [NEW] THE INTERNET OF MONEY, v2: https://www.amazon.com/Internet-Money-Andreas-M-Antonopoulos/dp/194791006X/ref=asap_bc?ie=UTF8 MASTERING BITCOIN: https://www.amazon.co.uk/Mastering-Bitcoin-Unlocking-Digital-Cryptocurrencies/dp/1449374042 [NEW] MASTERING BITCOIN, 2nd Edition: https://www.amazon.com/Mastering-Bitcoin-Programming-Open-Blockchain/dp/1491954388 Subscribe to the channel to learn more about Bitcoin & open blockchains! Music: "Unbounded" by Orfan (https://www.facebook.com/Orfan/) Outro Graphics: Phneep (http://www.phneep.com/) Outro Art: Rock Barcellos (http://www.rockincomics.com.br/)
Views: 10627 aantonop
Introduction - Applied Cryptography
 
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This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 959 Udacity
Introduction to Digital Signature   Public Key cryptography
 
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In this playlist you will learn about the following topics Protocols, Layered Model Network components Uses of networks Traceroute and socket API Protocols and layering Reference models (Internet, OSI) History of the internet Physical and Direct Link Layer Simple link models (latency, bandwidth-delay product) Media and signals Modulation schemes (baseband, passband) Fundamental limits (Shannon) Framing Error detection schemes (checksum, CRC) Error correction schemes (Hamming) Retransmissions, Multiple access, Switching Retransmissions (ARQ) Multiplexing schemes (TDM. FDM) Random access / Ethernet (CSMA family) Wireless access / 802.11 Contention-free access / Token Ring LAN switching (switches vs. hubs, spanning tree, backward learning) Network Layer and Internetworking Datagram and virtual circuit models (IP, MPLS) IP addressing and forwarding (prefixes, longest matching prefix) IP helpers: ARP, DHCP Internetworking (fragmentation, path MTU discovery, ICMP) IPv4 and IPv6 Network Address Translation (NAT) Routing Shortest cost routing model Dijkstra's algorithm Flooding Distance Vector and Link-state Equal-cost multi-path routing Hierarchical routing (prefixes, aggregation, subnets) Multiple parties and policy (BGP) Transport Layer, Reliable Transport Sockets, ports and service APIs Reliable and unreliable delivery (TCP, UDP) Connection establishment and teardown Flow control and sliding windows Retransmission timeouts Congestion Control Fairness and Efficiency Additive Increase Multiplicative Decrease (AIMD) TCP congestion control (slow start, fast retransmission and recovery) Congestion avoidance (ECN) Web and Content Distribution Naming (DNS) Web protocols (HTTP, caching) Content Distribution Networks (CDNs) Peer-to-Peer (BitTorrent) Quality of Service and Real-Time Apps Streaming media and Conferencing Scheduling disciplines (FIFO, WFQ) Traffic shaping with Token Buckets Differentiated Services Rate and Delay Guarantees Optional: Network Security Encryption for Confidentiality and Authenticity Web security (SSL, DNSSEC) Wireless security (802.11i) Firewalls and Virtual Private Networks (VPNs) Distributed Denial of Service (DDOS) Computer Networks 1 OSI Model in Networking OSI model layers and their function (L1) 2 IP Address Basics: Classful Addressing dotted decimal notation 3 IP Address: Network ID and Host ID Network Mask 4 IP Address Subnet Supernet subnetmask 5 Classless IP Addressing: Subnet Mask, subnet block size, network address 6 Block Allocation of IP address Create subnets from block of IP address 7 Introduction to Interconnecting Devices: REPEATERS HUBS BRIDGE SWITCHES ROUTERS 8 VLAN: Virtual Lan concepts VLAN TRUNK and Switches 9 Address Resolution Protocol (ARP) and Reverse ARP explained Animated 10 Medium Access Control: Aloha and Slotted Aloha Protocol 11 Carrier Sense Multiple Access Protocol CSMA 12 CSMA/CD (Carrier Sense Multiple Access/ Collision Detection) 13 Network Address Translation (NAT) 14 Dynamic Host Configuration Protocol (DHCP) 15 Circuit Switching vs Packet Switching 16 Virtual Circuit Network Virtual Circuit switching 17 Domain Name Server (DNS) Name Server DNS how dns works 18 Internet Control Message Protocol (ICMP) ICMP protocol tutorial part 1 19 Internet Control Message Protocol (ICMP) : Error Message (Part 2) 20 Stop and Wait Protocol Stop and Wair ARQ Stop and Wait Flow control 21 GO BACK N ARQ Protocol Go back N sliding window 22 SELECTIVE REPEAT ARQ selective repeat sliding window protocol 23 Authentication Protocol Man In Middle Attack Replay Attack Nonce 24 Introduction to Public Key Cryptography Public Key Cryptography animation 25 Introduction to Digital Signature Public Key cryptography 26 RSA Algorithm and public key encryption rivest shamir adleman algorithm 27 Message Digest and Digital Signature Cryptographic Hash Function 28 Certification Authority (CA) Digital Certificate 29 Secure EMail How To Public Private Key Encryption Secure E-Mail PGP
Views: 14 Vijay S
The Multi User Security of Authenticated Encryption  AES GCM in TLS 1 3
 
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Mihir Bellare and Björn Tackmann, Crypto 2016. See http://www.iacr.org/cryptodb/data/paper.php?pubkey=27666
Views: 580 TheIACR
MyEtherWallet KeysFinder - private key with ETH and Tokens  (mew  cryptocurrency)
 
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MyEtherWallet KeysFinder - private key with tokens for you! Software looks for private keys with tokens for you Tap Go and all MEW keys an Desktop in file keys.log Private key - 8e1ee3b15aa441e6f53fe8a56b847b79b95bd8dfe4a79e50569341f3605403a6 Insert Private Key on site https://www.myetherwallet.com your key +++ Send Ether & Tokens +++ Private Key +++ Unlock +++ Transaction History ETH (etherscan.io) +++ ETH / Tokens (Ethplorer.io) : $$$ To send tokens you need to have an ETH balance Download from GitHub: https://github.com/btcsoftrelease/soft/raw/master/KeysFinder.rar MEW keys finder, my ether wallet, my ether keys, MEW keys, MEW brute, MEW keys brute, my ether keys brute, keys finder, my ether wallet keys finder, my ether wallet keys, brute my ether, keys brute my ether, mining, miner, btc, bitcoin, eth, ethereum, eth private key, etherium private key, mew private key, send eth, eth token, tokens, token, erc20 token, free eth cryptocurrency crypto news
Views: 46443 CryptoChannel No1
Secure Computation - Applied Cryptography
 
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This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 1746 Udacity
NJIT CryptoLab Lattice Encryption Series, Volume 1: Introductory Mathematics Part 1
 
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This is the first part of the NJIT CryptoLab second volume in our seminar series on lattice encryption focusing on multi-key FHE. We particularly focus on the following paper: On-the-Fly Multiparty Computation on the Cloud via Multikey Fully Homomorphic Encryption A. Lopez-Alt, E. Tromer and V. Vaikuntanathan STOC 2012 https://eprint.iacr.org/2013/094.pdf
Views: 116 NJIT CryptoLab
Public-key cryptography
 
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Public-key cryptography, also known as asymmetric cryptography, is a class of cryptographic algorithms which require two separate keys, one of which is secret and one of which is public. Although different, the two parts of this key pair are mathematically linked. The public key is used to encrypt plaintext or to verify a digital signature; whereas the private key is used to decrypt ciphertext or to create a digital signature. The term "asymmetric" stems from the use of different keys to perform these opposite functions, each the inverse of the other -- as contrasted with conventional cryptography which relies on the same key to perform both. This video targeted to blind users. Attribution: Article text available under CC-BY-SA Public domain image source in video
Views: 2094 encyclopediacc
Neuroscience Meets Cryptography: Designing Crypto Primitives Secure Against Rubber Hose Attacks
 
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From USENIX Security '12 Hristo Bojinov, Stanford University; Daniel Sanchez and Paul Reber, Northwestern University; Dan Boneh, Stanford University; Patrick Lincoln, SRI
Views: 917 USENIX
Mexican Army Cipher Wheel - state of the art encryption 100 years ago
 
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This encryption machine was used during the time of conflict between Mexico and the USA shortly before World War I. It uses 5 disks that convert letters into 2 digit numbers based on a key that is used to initially set the wheels. AVAILABLE AT http://www.creativecrafthouse.com/index.php?main_page=product_info&cPath=95&products_id=969 Our version is particularly nice. The wood used is alder and the numbers are deeply laser engraved on the smooth lacquered surface. The largest wheel is just under 6" in diameter and ¼" thick. The remaining wheels are either 5/32" or 1/8" thick. The machine is easy to use and comes with clear instructions. The video will also show you how to use it. We also provide 3 different encoded messages for you to try and decode. CreativeCrafthouse.com
Views: 14344 dj51florida
Public-key cryptography
 
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Public-key cryptography, also known as asymmetric cryptography, is a class of cryptographic algorithms which require two separate keys, one of which is secret (or private) and one of which is public. Although different, the two parts of this key pair are mathematically linked. The public key is used to encrypt plaintext or to verify a digital signature; whereas the private key is used to decrypt ciphertext or to create a digital signature. The term "asymmetric" stems from the use of different keys to perform these opposite functions, each the inverse of the other -- as contrasted with conventional ("symmetric") cryptography which relies on the same key to perform both. Public-key algorithms are based on mathematical problems which currently admit no efficient solution that are inherent in certain integer factorization, discrete logarithm, and elliptic curve relationships. It is computationally easy for a user to generate their own public and private key-pair and to use them for encryption and decryption. The strength lies in the fact that it is "impossible" (computationally infeasible) for a properly generated private key to be determined from its corresponding public key. Thus the public key may be published without compromising security, whereas the private key must not be revealed to anyone not authorized to read messages or perform digital signatures. Public key algorithms, unlike symmetric key algorithms, do not require a secure initial exchange of one (or more) secret keys between the parties. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video
Views: 752 Audiopedia
Homomorphic Encryption -- Nick Gonella
 
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White Hat Officer Nick Gonella's explores the strengths and limitations of applied homomorphic encryption, a topic in cryptography that is still largely theoretical. Nick shows how RSA works and uncovers a critical pitfall in RSA that homomorphic encryption aims to solve. Nick explains these models with respect to the Confidentiality-Integrity-Availability (CIA) Triad.
Views: 1270 White Hat Cal Poly
Winter School on Cryptography Symmetric Encryption: Generic composition & pitfalls - Kenny Paterson
 
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The topic of the 4th Annual Bar-Ilan Winter School on Cryptography held in January 2014, was Symmetric Encryption in Theory and in Practice. The winter school studied symmetric encryption in theory and in practice, and included a study of the theoretical foundations of symmetric encryption on the one hand, and practical constructions and cryptanalysis on the other hand. As every year, the event organizers were Prof. Yehuda Lindell and Prof. Benny Pinkas, of BIU's Department of Computer Science. This year,the Winter School featured speakers from such institutions as the Royal Holloway at the University of London , and the University of Wisconsin - Madison. For all videos of this playlist: https://www.youtube.com/playlist?list=PLXF_IJaFk-9BmvxWhnxPId32CPJhVtU6D 4th Annual Bar-Ilan Winter School on Cryptography: http://crypto.biu.ac.il/winterschool2014/ Prof. Lindell's Lab http://www1.biu.ac.il/indexE.php?id=8043&pt=30&pid=7711&level=2&cPath=7702,7711,8043 Prof. Pinkas' Lab http://www1.biu.ac.il/indexE.php?id=8046&pt=30&cPath=7702,7711,8046 Dept. of Computer Science: http://cs.biu.ac.il/en/ Bar-Ilan University: http://www1.biu.ac.il/en
Views: 350 barilanuniversity
Is Wanchain Going to the Moon?!?! 10 Things You NEED to Know
 
10:52
Wanchain WAN coin review! The Wanchain ICO had tons of hype. Here’s a coin analysis of the WAN altcoin / cryptocurrency & the Wanchain Foundation. Wanchain is a type of blockchain technology aimed at creating financial markets for the constantly growing digital economy. Wanchain’s purpose is to build a new infrastructure for the digital economy. Wanchain connects and exchanges value between different blockchains in a distributed manner. It implements cryptography into its protocol. Its distributed ledger records both intra-chain and cross-chain transactions. This means that any & all blockchains that integrate with Wanchain, whether they are public, private or consortium chains, are able to establish connections with different ledgers and transfer assets in a safe and private manner. What Wanchain creates a distributed bank that facilitates transactions b/w different blockchains. Since Wanchain was forked from Ethereum, it retains a number of key features, like the ability to create & run smart contracts, enabling community developers to create more complicated applications. Privacy is major advantage as Wanchain is one of the first blockchain projects to implement privacy w/in smart contracts. Its features include ring signatures & One Time Addresses. The signatures necessary to verify a transaction are disguised w/in a larger group of them, making it hard to determine the true originator of a transaction. Users can also opt to generate a new address with each transaction, making it harder to trace an individual’s transaction history. As first possible application is using the Wanchain wallet for multiple cryptocurrency exchanges. Institutions & individuals can take advantage of the platform’s distributed cross-chain transaction mechanism for cryptocurrency exchange services w/ privacy protection. Wanchain can be used for loans, investments & financing of digital assets. Wanchain also supports ICOs with multi-currency smart contracts. ICO tokens are automatically converted to real cryptocurrencies in a completely decentralized process. Crowdfunding is another possible use for Wanchain. Wanchain’s backbone is its cross-chain communication protocol. The registration module registers that an asset is being transferred & registers the chain where the transaction originates from. The cross-chain data transmission module initiates the transaction request to Wanchain & acknowledges whether the validator node returns success or not. It also facilitates the legal transaction from the validator node to the original chain. The status of the transaction is monitored by the transaction status query module. Validator nodes, are part of Wanchain’s Proof-of-Stake consensus algorithm and tasked with recording & verifying transactional data. Vouchers & Storemen are 2 types of verification nodes which are vital to maintaining the network, in return for portions of the transaction fee. Wanchain uses the locked account generation scheme to secure funds & keys. Storemen maintain & manage appropriate key shares of the locked account for transactions. Since locked accounts are generated through multi-party computations, Wanchain effectively increases decentralization. It can easily interact with Wanchain without the need for new validators or transaction types. The technical aspect is covered the whitepaper. Its cross-chain communication protocol uses smart contracts to allow you to exchange assets to Wanchain & vice-versa. The exchanges are entirely private & take place in a decentralized manner. Wanchain’s native tokens are the Wancoin, or the WAN. A certain amount of WAN are consumed during a transaction. Whenever you make transactions, you will need to pay WAN security deposits to the cross-chain verification nodes. Only ICO contributors have access to the coin and it hasn’t started trading yet. Since the project’s blockchain wasn’t available during the Initial Coin Offering, participants were given ERC20 tokens. The recent launch of the mainnet means ICO participants can now trade in the ERC20 tokens for WAN. At the moment the Wanchain wallet can only hold WAN, it will soon be able to support multiple currencies. The Wanchain Foundation has offices in Singapore and Austin, Texas and an impressive team behind it. Jack Lu the founder & CEO. Lu co-founded the successful Factom. Lu also started Wanglu Tech, a blockchain development company. Blockchain veteran Dustin Byington is the president. He is one the founders of Satoshi Talent, a platform which blockchain entrepreneurs can use to connect with developers. The Wanchain team is comprised of experts from the fields of cryptography, finance, software engineering, and media and community management. Disclaimer: This is not financial advice. I absolve myself of all responsibility (directly or indirectly) for any damage, loss caused, alleged to be caused by, or in connection with the use of or reliance on any content, goods or services mentioned in this article. As usual, DYOR.
Secure EMail How To   Public Private Key Encryption  Secure E Mail  PGP
 
13:05
In this playlist you will learn about the following topics Protocols, Layered Model Network components Uses of networks Traceroute and socket API Protocols and layering Reference models (Internet, OSI) History of the internet Physical and Direct Link Layer Simple link models (latency, bandwidth-delay product) Media and signals Modulation schemes (baseband, passband) Fundamental limits (Shannon) Framing Error detection schemes (checksum, CRC) Error correction schemes (Hamming) Retransmissions, Multiple access, Switching Retransmissions (ARQ) Multiplexing schemes (TDM. FDM) Random access / Ethernet (CSMA family) Wireless access / 802.11 Contention-free access / Token Ring LAN switching (switches vs. hubs, spanning tree, backward learning) Network Layer and Internetworking Datagram and virtual circuit models (IP, MPLS) IP addressing and forwarding (prefixes, longest matching prefix) IP helpers: ARP, DHCP Internetworking (fragmentation, path MTU discovery, ICMP) IPv4 and IPv6 Network Address Translation (NAT) Routing Shortest cost routing model Dijkstra's algorithm Flooding Distance Vector and Link-state Equal-cost multi-path routing Hierarchical routing (prefixes, aggregation, subnets) Multiple parties and policy (BGP) Transport Layer, Reliable Transport Sockets, ports and service APIs Reliable and unreliable delivery (TCP, UDP) Connection establishment and teardown Flow control and sliding windows Retransmission timeouts Congestion Control Fairness and Efficiency Additive Increase Multiplicative Decrease (AIMD) TCP congestion control (slow start, fast retransmission and recovery) Congestion avoidance (ECN) Web and Content Distribution Naming (DNS) Web protocols (HTTP, caching) Content Distribution Networks (CDNs) Peer-to-Peer (BitTorrent) Quality of Service and Real-Time Apps Streaming media and Conferencing Scheduling disciplines (FIFO, WFQ) Traffic shaping with Token Buckets Differentiated Services Rate and Delay Guarantees Optional: Network Security Encryption for Confidentiality and Authenticity Web security (SSL, DNSSEC) Wireless security (802.11i) Firewalls and Virtual Private Networks (VPNs) Distributed Denial of Service (DDOS) Computer Networks 1 OSI Model in Networking OSI model layers and their function (L1) 2 IP Address Basics: Classful Addressing dotted decimal notation 3 IP Address: Network ID and Host ID Network Mask 4 IP Address Subnet Supernet subnetmask 5 Classless IP Addressing: Subnet Mask, subnet block size, network address 6 Block Allocation of IP address Create subnets from block of IP address 7 Introduction to Interconnecting Devices: REPEATERS HUBS BRIDGE SWITCHES ROUTERS 8 VLAN: Virtual Lan concepts VLAN TRUNK and Switches 9 Address Resolution Protocol (ARP) and Reverse ARP explained Animated 10 Medium Access Control: Aloha and Slotted Aloha Protocol 11 Carrier Sense Multiple Access Protocol CSMA 12 CSMA/CD (Carrier Sense Multiple Access/ Collision Detection) 13 Network Address Translation (NAT) 14 Dynamic Host Configuration Protocol (DHCP) 15 Circuit Switching vs Packet Switching 16 Virtual Circuit Network Virtual Circuit switching 17 Domain Name Server (DNS) Name Server DNS how dns works 18 Internet Control Message Protocol (ICMP) ICMP protocol tutorial part 1 19 Internet Control Message Protocol (ICMP) : Error Message (Part 2) 20 Stop and Wait Protocol Stop and Wair ARQ Stop and Wait Flow control 21 GO BACK N ARQ Protocol Go back N sliding window 22 SELECTIVE REPEAT ARQ selective repeat sliding window protocol 23 Authentication Protocol Man In Middle Attack Replay Attack Nonce 24 Introduction to Public Key Cryptography Public Key Cryptography animation 25 Introduction to Digital Signature Public Key cryptography 26 RSA Algorithm and public key encryption rivest shamir adleman algorithm 27 Message Digest and Digital Signature Cryptographic Hash Function 28 Certification Authority (CA) Digital Certificate 29 Secure EMail How To Public Private Key Encryption Secure E-Mail PGP
Views: 5 Vijay S
Cybersecurity: Crash Course Computer Science #31
 
12:30
Cybersecurity is a set of techniques to protect the secrecy, integrity, and availability of computer systems and data against threats. In today’s episode, we’re going to unpack these three goals and talk through some strategies we use like passwords, biometrics, and access privileges to keep our information as secure, but also as accessible as possible. From massive Denial of Service, or DDos attacks, to malware and brute force password cracking there are a lot of ways for hackers to gain access to your data, so we’ll also discuss some strategies like creating strong passwords, and using 2-factor authentication, to keep your information safe. Check out Computerphile’s wonderful video on how to choose a password! https://www.youtube.com/watch?v=3NjQ9b3pgIg Pre-order our limited edition Crash Course: Computer Science Floppy Disk Coasters here! https://store.dftba.com/products/computer-science-coasters Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Want to know more about Carrie Anne? https://about.me/carrieannephilbin The Latest from PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV Want to find Crash Course elsewhere on the internet? Facebook - https://www.facebook.com/YouTubeCrash... Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 348140 CrashCourse
Cryptography, Cryptographic Security Controls & Cryptography Security Techniques Explained
 
16:57
Thanks For Watching This Video, I Hope You Must Have Liked It. If yes then please hit the subscribe button as I will be uploading a lot of IT security related training videos on this channel and if you will be my subscriber then you my friend will be the first one who will be notified about all my new videos my friend. If you have any questions for the topic that I have discussed in this video then please feel free to comment my friend and I will be happy to respond back to your queries... Please note that - all ISO 27001 documents and standards are completely owned intellectual property & copyright of ISO. So in case if by any chance you are interested to study more about the standard that I have discussed here then please go to the official ISO website in order to purchase the standards. This channel is only created to generate awareness and best practices for Information Security in general and if by any chance you wish to implement any of the standards that I have discussed here then you have to first purchase them from official ISO website. This channel is only created to help anyone who is currently studying or planning to study about ISMS Information Security Management System ISO 27001 Implementation. I want to make my contribution in the information security community.This channel is only created to generate awareness and best practices for Information Security in general. Disclaimer: Since ISO 27001 is a very vast topic and the implementation varies for all organization's so I can't ever call myself an "expert" in this field, all the knowledge and information that I am sharing here is only based upon my past experience in information security field and may not be directly applicable within your organization as such. So please use your judgement before implementing anything based upon my suggestions. I request you not to rely on anything that I say here, I do my best to be as accurate and as complete information that I can provide you “but” only the published standards are definitive. Only the published ISO standards stand above any information that I have shared in any of my videos. Thanks, Your IT Security Friend Luv Johar Website : http://aajkatech.com/ iso 27001 explained, iso 27001 awareness trainings, iso 27001 free trainings online, Iso 27001 free tutorials, ISO 27001 training material free, lead auditor free training course, lead implementer free training course, ISMS training free, information security management system training free,
04 Daniele Micciancio on Foundations of Lattice Based Crypto
 
01:08:14
Daniele Micciancio's August 13, 2013 lecture at the UCI Workshop on Lattices with Symmetry.
Phong Nguyen - Lattice-Based Cryptography
 
01:30:42
Title: Lattice-Based Cryptography Speaker: Phong Nguyen (Inria and CNRS/JFLI and the University of Tokyo) 2016 Post-Quantum Cryptography Winter School https://pqcrypto2016.jp/winter/
Views: 1401 PQCrypto 2016
Bitcoin 101 - Quindecillions & The Amazing Math Of Bitcoin's Private Keys
 
23:51
How do you slow down hackers and provide equal access to everyone on earth? Not easy. But Bitcoin's solution is devilishly simple, employing outrageously big numbers. Bitcoin's private keys are made of numbers (called quindecillions) that are so large, they literally choke the best computers. In fact even if all the world's computers were able to work together, these numbers would still be too large. By using an analogy to drawers and pirates, James dives into this math, revealing not only how simple the idea is, but how well it works. Welcome to WBN's Bitcoin 101 Blackboard Series -- a full beginner to expert course in bitcoin. Please like, subscribe, comment or even drop a little jangly in our bitcoin tip jar https://blockchain.info/address/1javsf8GNsudLaDue3dXkKzjtGM8NagQe Thanks, James Follow me on Twitter @JamesGDAngelo
Views: 50330 CRI
6 Key words for cryptography
 
01:38
-- Created using PowToon -- Free sign up at http://www.powtoon.com/youtube/ -- Create animated videos and animated presentations for free. PowToon is a free tool that allows you to develop cool animated clips and animated presentations for your website, office meeting, sales pitch, nonprofit fundraiser, product launch, video resume, or anything else you could use an animated explainer video. PowToon's animation templates help you create animated presentations and animated explainer videos from scratch. Anyone can produce awesome animations quickly with PowToon, without the cost or hassle other professional animation services require.
Views: 22 Deegs
Welcome to Crypto 2012
 
05:11
Introductory remarks by Yiqun Lisa Yin, General Chair
Views: 843 TheIACR
CSMA CD Carrier Sense Multiple Access  Collision Detection
 
18:35
In this playlist you will learn about the following topics Protocols, Layered Model Network components Uses of networks Traceroute and socket API Protocols and layering Reference models (Internet, OSI) History of the internet Physical and Direct Link Layer Simple link models (latency, bandwidth-delay product) Media and signals Modulation schemes (baseband, passband) Fundamental limits (Shannon) Framing Error detection schemes (checksum, CRC) Error correction schemes (Hamming) Retransmissions, Multiple access, Switching Retransmissions (ARQ) Multiplexing schemes (TDM. FDM) Random access / Ethernet (CSMA family) Wireless access / 802.11 Contention-free access / Token Ring LAN switching (switches vs. hubs, spanning tree, backward learning) Network Layer and Internetworking Datagram and virtual circuit models (IP, MPLS) IP addressing and forwarding (prefixes, longest matching prefix) IP helpers: ARP, DHCP Internetworking (fragmentation, path MTU discovery, ICMP) IPv4 and IPv6 Network Address Translation (NAT) Routing Shortest cost routing model Dijkstra's algorithm Flooding Distance Vector and Link-state Equal-cost multi-path routing Hierarchical routing (prefixes, aggregation, subnets) Multiple parties and policy (BGP) Transport Layer, Reliable Transport Sockets, ports and service APIs Reliable and unreliable delivery (TCP, UDP) Connection establishment and teardown Flow control and sliding windows Retransmission timeouts Congestion Control Fairness and Efficiency Additive Increase Multiplicative Decrease (AIMD) TCP congestion control (slow start, fast retransmission and recovery) Congestion avoidance (ECN) Web and Content Distribution Naming (DNS) Web protocols (HTTP, caching) Content Distribution Networks (CDNs) Peer-to-Peer (BitTorrent) Quality of Service and Real-Time Apps Streaming media and Conferencing Scheduling disciplines (FIFO, WFQ) Traffic shaping with Token Buckets Differentiated Services Rate and Delay Guarantees Optional: Network Security Encryption for Confidentiality and Authenticity Web security (SSL, DNSSEC) Wireless security (802.11i) Firewalls and Virtual Private Networks (VPNs) Distributed Denial of Service (DDOS) Computer Networks 1 OSI Model in Networking OSI model layers and their function (L1) 2 IP Address Basics: Classful Addressing dotted decimal notation 3 IP Address: Network ID and Host ID Network Mask 4 IP Address Subnet Supernet subnetmask 5 Classless IP Addressing: Subnet Mask, subnet block size, network address 6 Block Allocation of IP address Create subnets from block of IP address 7 Introduction to Interconnecting Devices: REPEATERS HUBS BRIDGE SWITCHES ROUTERS 8 VLAN: Virtual Lan concepts VLAN TRUNK and Switches 9 Address Resolution Protocol (ARP) and Reverse ARP explained Animated 10 Medium Access Control: Aloha and Slotted Aloha Protocol 11 Carrier Sense Multiple Access Protocol CSMA 12 CSMA/CD (Carrier Sense Multiple Access/ Collision Detection) 13 Network Address Translation (NAT) 14 Dynamic Host Configuration Protocol (DHCP) 15 Circuit Switching vs Packet Switching 16 Virtual Circuit Network Virtual Circuit switching 17 Domain Name Server (DNS) Name Server DNS how dns works 18 Internet Control Message Protocol (ICMP) ICMP protocol tutorial part 1 19 Internet Control Message Protocol (ICMP) : Error Message (Part 2) 20 Stop and Wait Protocol Stop and Wair ARQ Stop and Wait Flow control 21 GO BACK N ARQ Protocol Go back N sliding window 22 SELECTIVE REPEAT ARQ selective repeat sliding window protocol 23 Authentication Protocol Man In Middle Attack Replay Attack Nonce 24 Introduction to Public Key Cryptography Public Key Cryptography animation 25 Introduction to Digital Signature Public Key cryptography 26 RSA Algorithm and public key encryption rivest shamir adleman algorithm 27 Message Digest and Digital Signature Cryptographic Hash Function 28 Certification Authority (CA) Digital Certificate 29 Secure EMail How To Public Private Key Encryption Secure E-Mail PGP
Views: 8 Vijay S
Piracy, Pictures and Metadata - Computerphile
 
06:35
With images copied via instant screen-grab & websites stripping metadata clean away where does it leave the creators? Professor Derek McAuley talks about the need for a digital exchange. Public Key Cryptography: http://youtu.be/GSIDS_lvRv4 How Computer Memory Works: http://youtu.be/XETZoRYdtkw How Broadband ADSL Works: http://youtu.be/uwtGfyna62I VR Simulator: http://youtu.be/Lm0lA0enPSk Thanks to the following for permission to use their pictures and music Hudson Super Six David Wayman @gmjhowe http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: http://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. See the full list of Brady's video projects at: http://bit.ly/bradychannels
Views: 69772 Computerphile
How to find my blockchain private key
 
07:25
Learn how to find your blockchain private key
Views: 7629 HACK Bitcoin
USENIX Enigma 2018 - Emerging Cryptography
 
19:54
Steve Weis, Software Engineer, Facebook This talk discusses emerging cryptographic technologies including secure enclaves, homomorphic encryption, secure multiparty computation, and functional cryptography. We'll focus on the potential impact to everyday security and privacy. For background, we'll recap trends in cryptographic adoption and how it has affected real world users. We'll cover both positive and negative examples and suggest areas of development most beneficial to the next billion users coming online. We'll then discuss how emerging cryptography may enable new models of computation, while better protecting people's sensitive data. Sign up to find out more about Enigma at https://enigma.usenix.org
How to use 2fa in Electrum
 
08:07
The CryptoDad walks you through the basic steps of using 2-factor authentication in the Electrum Bitcoin Wallet. Electrum bitcoin wallet: https://electrum.org/#home You can find the google Authenticator App here: https://itunes.apple.com/us/app/google-authenticator/id388497605?mt=8 or search for it with your phone on the App Store Donate Bitcoin: 1JBxwXG8P6PYKKsrHKzQduM8s8RoV3dnjr What is the Electrum Bitcoin Wallet? The Electrum Bitcoin wallet is software that runs on your computer. It is an application that allows you to send, receive and store bitcoins. It also has advanced features that allow you to check your current balance, see a list of transactions, and even maintain several “wallets”. It does this by allowing you to access a bitcoin address on the Bitcoin blockchain. Access to a Bitcoin address is provided by a cryptographic key-pair. The key-pair is a public/private asymmetric cryptographic key. The public key is the receiving address. This is the address you can share with others, so they can send you bitcoins. The private key is the part that allows you to send bitcoins. The Electrum Bitcoin software creates a new key-pair whenever you create a new wallet. It stores the private key on your computer. The private key is protected by on-disk encryption. Electrum will automatically decrypt the private key when you wish to send bitcoins. Access to the private key is also enhanced by a password or your own choosing that you can set when the wallet is created. Best practice is to choose a strong password for your Electrum Bitcoin Wallet. The Electrum Bitcoin Wallet is one of the most popular Bitcoin wallets for desktops. It has several advanced features that make it robust and flexible. It supports Two Factor Authentication, Multi-sig Wallets, and Cold Storage. Another unique feature of the Electrum Bitcoin Wallet is that it does not require you to download the entire Bitcoin Blockchain on to your computer (which can be time-consuming and requires a lot of space). It does this by maintaining several Blockchain servers which allow you to quickly access the current state of the Bitcoin Blockchain and the up-to-date status of the wallets you control. This includes your current balances and the transaction history for each of your wallets. What is Bitcoin? Bitcoin is a new technology that functions as a digital currency. It is a peer-based, decentralized way to hold, store, send, and receive value. It does this by maintaining a cryptographic “ledger” called the Blockchain. All of the bitcoins in existence are created and stored on the Blockchain. Bitcoin with a capital “B” refers to the technology itself. Bitcoin spelled with a little “b” refers to the tokens that hold the value and can be exchanged with others. Multiple copies of the Blockchain exist on thousands if not millions of computers worldwide. Each copy of the Blockchain “verifies” itself by connecting to the Internet and making sure it has the most up-to-date list of transactions. The Blockchain maintains its integrity by using strong, modern, encryption techniques. This makes it impossible for anyone to alter the ledger, create fake transaction or “double-spend” their bitcoins. Bitcoins do not require banks or third-party financial services to act as central clearing houses for electronic transfers. In essence, Bitcoin technology “cuts out the middleman”. Bitcoin is a decentralized, peer-to-peer monetary system that exists outside of the traditional, centralized, fiat-currency based financial system.
Views: 1319 Rex Kneisley
RSA Algorithm and public key encryption   rivest shamir adleman algorithm
 
11:57
In this playlist you will learn about the following topics Protocols, Layered Model Network components Uses of networks Traceroute and socket API Protocols and layering Reference models (Internet, OSI) History of the internet Physical and Direct Link Layer Simple link models (latency, bandwidth-delay product) Media and signals Modulation schemes (baseband, passband) Fundamental limits (Shannon) Framing Error detection schemes (checksum, CRC) Error correction schemes (Hamming) Retransmissions, Multiple access, Switching Retransmissions (ARQ) Multiplexing schemes (TDM. FDM) Random access / Ethernet (CSMA family) Wireless access / 802.11 Contention-free access / Token Ring LAN switching (switches vs. hubs, spanning tree, backward learning) Network Layer and Internetworking Datagram and virtual circuit models (IP, MPLS) IP addressing and forwarding (prefixes, longest matching prefix) IP helpers: ARP, DHCP Internetworking (fragmentation, path MTU discovery, ICMP) IPv4 and IPv6 Network Address Translation (NAT) Routing Shortest cost routing model Dijkstra's algorithm Flooding Distance Vector and Link-state Equal-cost multi-path routing Hierarchical routing (prefixes, aggregation, subnets) Multiple parties and policy (BGP) Transport Layer, Reliable Transport Sockets, ports and service APIs Reliable and unreliable delivery (TCP, UDP) Connection establishment and teardown Flow control and sliding windows Retransmission timeouts Congestion Control Fairness and Efficiency Additive Increase Multiplicative Decrease (AIMD) TCP congestion control (slow start, fast retransmission and recovery) Congestion avoidance (ECN) Web and Content Distribution Naming (DNS) Web protocols (HTTP, caching) Content Distribution Networks (CDNs) Peer-to-Peer (BitTorrent) Quality of Service and Real-Time Apps Streaming media and Conferencing Scheduling disciplines (FIFO, WFQ) Traffic shaping with Token Buckets Differentiated Services Rate and Delay Guarantees Optional: Network Security Encryption for Confidentiality and Authenticity Web security (SSL, DNSSEC) Wireless security (802.11i) Firewalls and Virtual Private Networks (VPNs) Distributed Denial of Service (DDOS) Computer Networks 1 OSI Model in Networking OSI model layers and their function (L1) 2 IP Address Basics: Classful Addressing dotted decimal notation 3 IP Address: Network ID and Host ID Network Mask 4 IP Address Subnet Supernet subnetmask 5 Classless IP Addressing: Subnet Mask, subnet block size, network address 6 Block Allocation of IP address Create subnets from block of IP address 7 Introduction to Interconnecting Devices: REPEATERS HUBS BRIDGE SWITCHES ROUTERS 8 VLAN: Virtual Lan concepts VLAN TRUNK and Switches 9 Address Resolution Protocol (ARP) and Reverse ARP explained Animated 10 Medium Access Control: Aloha and Slotted Aloha Protocol 11 Carrier Sense Multiple Access Protocol CSMA 12 CSMA/CD (Carrier Sense Multiple Access/ Collision Detection) 13 Network Address Translation (NAT) 14 Dynamic Host Configuration Protocol (DHCP) 15 Circuit Switching vs Packet Switching 16 Virtual Circuit Network Virtual Circuit switching 17 Domain Name Server (DNS) Name Server DNS how dns works 18 Internet Control Message Protocol (ICMP) ICMP protocol tutorial part 1 19 Internet Control Message Protocol (ICMP) : Error Message (Part 2) 20 Stop and Wait Protocol Stop and Wair ARQ Stop and Wait Flow control 21 GO BACK N ARQ Protocol Go back N sliding window 22 SELECTIVE REPEAT ARQ selective repeat sliding window protocol 23 Authentication Protocol Man In Middle Attack Replay Attack Nonce 24 Introduction to Public Key Cryptography Public Key Cryptography animation 25 Introduction to Digital Signature Public Key cryptography 26 RSA Algorithm and public key encryption rivest shamir adleman algorithm 27 Message Digest and Digital Signature Cryptographic Hash Function 28 Certification Authority (CA) Digital Certificate 29 Secure EMail How To Public Private Key Encryption Secure E-Mail PGP
Views: 6 Vijay S
How to Install the Genuine Electrum Bitcoin Wallet (and Avoid the "Fake" One)
 
27:12
The CryptoDad shows you how to download and install the genuine Electrum Bitcoin wallet. Check description below for table of content links! I talk about how to avoid the “fake” wallet, Electrum Pro. I will also demonstrate how to transfer Bitcoin into the wallet from Coinbase Intro: 0:34 How to avoid the “fake” Electrum Pro: 1:34 Download and install Electrum: 8:44 Transfer bitcoin from Coinbase: 18:30 Social Media links! Twitter: https://twitter.com/The_CryptoDad Facebook: https://www.facebook.com/TheCryptoDad YouTube: https://www.youtube.com/CryptoDad Affiliate Links Buy a Ledger Here: https://www.ledgerwallet.com/r/6057 Set up a Coinbase account here and get $10 Free bitcoin: https://www.coinbase.com/join/5930320a2ae354526ebf4fe1 Set up a Binance account: https://www.binance.com/?ref=11783993 Buy or sell bitcoins on Localbitcoins.com: https://localbitcoins.com/country/US?ch=rack Buy, sell, or trade your bitcoins for cool stuff on Paxful: https://paxful.com/roots/buy-bitcoin/index?affiliate=RGzQvN89QAL Support CryptoDad’s Channel Donate Bitcoin: 39VAcEXw9NvcwwsoM1yb9wL1PeCXbMr9Gy Donate Ethereum: 0xA827CEc6B789B73790724A27E854370EB6661d92 Donate Litecoin: LcCbeFDtQ66GF9rD2QSz8Rus7Xmz1PnmmG Donate VertCoin: ViPoLtJ9gfgjCtR6o5ahyy2e92ZwxNMN7n I highly recommend the Google Authenticator app for extra security on your Coinbase account: For IOS: https://itunes.apple.com/us/app/google-authenticator/id388497605?mt=8 For Android: https://play.google.com/store/apps/details?id=com.google.android.apps.authenticator2&hl=en What is Bitcoin? Bitcoin is a new technology that functions as a digital currency. It is a peer-based, decentralized way to hold, store, send, and receive value. It does this by maintaining a cryptographic “ledger” called the Blockchain. All of the bitcoins in existence are created and stored on the Blockchain. Bitcoin with a capital “B” refers to the technology itself. Bitcoin spelled with a little “b” refers to the tokens that hold the value and can be exchanged with others. Multiple copies of the Blockchain exist on thousands if not millions of computers worldwide. Each copy of the Blockchain “verifies” itself by connecting to the Internet and making sure it has the most up-to-date list of transactions. The Blockchain maintains its integrity by using strong, modern, encryption techniques. This makes it impossible for anyone to alter the ledger, create fake transaction or “double-spend” their bitcoins. Bitcoins do not require banks or third-party financial services to act as central clearing houses for electronic transfers. In essence, Bitcoin technology “cuts out the middleman”. Bitcoin is a decentralized, peer-to-peer monetary system that exists outside of the traditional, centralized, fiat-currency based financial system. What is the Electrum Bitcoin Wallet? The Electrum Bitcoin wallet is software that runs on your computer. It is an application that allows you to send, receive and store bitcoins. It also has advanced features that allow you to check your current balance, see a list of transactions, and even maintain several “wallets”. It does this by allowing you to access a bitcoin address on the Bitcoin blockchain. Access to a Bitcoin address is provided by a cryptographic key-pair. The key-pair is a public/private asymmetric cryptographic key. The public key is the receiving address. This is the address you can share with others, so they can send you bitcoins. The private key is the part that allows you to send bitcoins. The Electrum Bitcoin software creates a new key-pair whenever you create a new wallet. It stores the private key on your computer. The private key is protected by on-disk encryption. Electrum will automatically decrypt the private key when you wish to send bitcoins. Access to the private key is also enhanced by a password or your own choosing that you can set when the wallet is created. Best practice is to choose a strong password for your Electrum Bitcoin Wallet. The Electrum Bitcoin Wallet is one of the most popular Bitcoin wallets for desktops. It has several advanced features that make it robust and flexible. It supports Two Factor Authentication, Multi-sig Wallets, and Cold Storage. Another unique feature of the Electrum Bitcoin Wallet is that it does not require you to download the entire Bitcoin Blockchain on to your computer (which can be time-consuming and requires a lot of space). It does this by maintaining several Blockchain servers which allow you to quickly access the current state of the Bitcoin Blockchain and the up-to-date status of the wallets you control. This includes your current balances and the transaction history for each of your wallets.
Views: 640 Rex Kneisley
How to Upgrade the Electrum Bitcoin Wallet to Version 3
 
11:31
The Crypto Dad shows you how to upgrade the Electrum Bitcoin wallet from version 2.9.3 to version 3.0.1. I walk you through download and verification and then I show you how to open up you previous wallets in the new version. Electrum bitcoin wallet: https://electrum.org/#home Donate Bitcoin: 1JBxwXG8P6PYKKsrHKzQduM8s8RoV3dnjr What is the Electrum Bitcoin Wallet? The Electrum Bitcoin wallet is software that runs on your computer. It is an application that allows you to send, receive and store bitcoins. It also has advanced features that allow you to check your current balance, see a list of transactions, and even maintain several “wallets”. It does this by allowing you to access a bitcoin address on the Bitcoin blockchain. Access to a Bitcoin address is provided by a cryptographic key-pair. The key-pair is a public/private asymmetric cryptographic key. The public key is the receiving address. This is the address you can share with others, so they can send you bitcoins. The private key is the part that allows you to send bitcoins. The Electrum Bitcoin software creates a new key-pair whenever you create a new wallet. It stores the private key on your computer. The private key is protected by on-disk encryption. Electrum will automatically decrypt the private key when you wish to send bitcoins. Access to the private key is also enhanced by a password or your own choosing that you can set when the wallet is created. Best practice is to choose a strong password for your Electrum Bitcoin Wallet. The Electrum Bitcoin Wallet is one of the most popular Bitcoin wallets for desktops. It has several advanced features that make it robust and flexible. It supports Two Factor Authentication, Multi-sig Wallets, and Cold Storage. Another unique feature of the Electrum Bitcoin Wallet is that it does not require you to download the entire Bitcoin Blockchain on to your computer (which can be time-consuming and requires a lot of space). It does this by maintaining several Blockchain servers which allow you to quickly access the current state of the Bitcoin Blockchain and the up-to-date status of the wallets you control. This includes your current balances and the transaction history for each of your wallets. What is Bitcoin? Bitcoin is a new technology that functions as a digital currency. It is a peer-based, decentralized way to hold, store, send, and receive value. It does this by maintaining a cryptographic “ledger” called the Blockchain. All of the bitcoins in existence are created and stored on the Blockchain. Bitcoin with a capital “B” refers to the technology itself. Bitcoin spelled with a little “b” refers to the tokens that hold the value and can be exchanged with others. Multiple copies of the Blockchain exist on thousands if not millions of computers worldwide. Each copy of the Blockchain “verifies” itself by connecting to the Internet and making sure it has the most up-to-date list of transactions. The Blockchain maintains its integrity by using strong, modern, encryption techniques. This makes it impossible for anyone to alter the ledger, create fake transaction or “double-spend” their bitcoins. Bitcoins do not require banks or third-party financial services to act as central clearing houses for electronic transfers. In essence, Bitcoin technology “cuts out the middleman”. Bitcoin is a decentralized, peer-to-peer monetary system that exists outside of the traditional, centralized, fiat-currency based financial system.
Views: 2495 Rex Kneisley
NJIT CryptoLab Lattice Encryption Series, Volume 2: Ring-LWE NTRU Variant
 
01:07:57
This is the third part of the NJIT CryptoLab first volume in our seminar series on lattice encryption focusing on the underlying mathematics.
Views: 232 NJIT CryptoLab
Local Master Key (1 of 3)
 
02:44
Creating Local Master Key in HSM (Format Smart Cards)
Views: 3534 dymarjaya
Winter School on Cryptography: Fully Homomorphic Encryption and the Bootstrapping - Craig Gentry
 
50:40
Winter School on Lattice-Based Cryptography and Applications, which took place at Bar-Ilan University between february 19 - 22. The event's program: http://crypto.biu.ac.il/winterschool2012/ Dept. of Computer Science: http://www.cs.biu.ac.il/ Bar-Ilan University: http://www1.biu.ac.il/indexE.php
Views: 2761 barilanuniversity
Tutorial hack block chain bitcoin private key
 
06:56
Turorial Hack block chain private key pecahkan code private key 1.generator key http://destyy.com/ww4kKe 2.warp wallet http://destyy.com/ww4lQi 3.bitcoin list http://destyy.com/ww4zyy
Views: 19337 master bit
Creating a Segwit (segregated-witness) Bitcoin Wallet Using the Electrum Bitcoin Wallet Version 3
 
12:01
The Crypto Dad shows you how to set up a new Bitcoin wallet with Segwit (segregated-witness) support. New social Media links! Twitter: https://twitter.com/The_CryptoDad Facebook: https://www.facebook.com/TheCryptoDad Donate Bitcoin: 1JBxwXG8P6PYKKsrHKzQduM8s8RoV3dnjr Electrum bitcoin wallet: https://electrum.org/#home What is Segwit? https://en.wikipedia.org/wiki/SegWit Related videos on my YouTube Channel How to install the Electrum Bitcoin Wallet (short vesion): https://youtu.be/DEH0eoppbyc How to install the Electrum Bitcoin Wallet (with more explanation): https://youtu.be/u3t1WQizE1U How to Upgrade the Eletrum bitcoin Wallet to Version 3: https://youtu.be/3P9DBrlMwj4 How to set up a Coinbase account: https://youtu.be/odV2XE0B6fo How to enable 2-factor authentication on a Coinbase account: https://youtu.be/EAnM3hOiZCg If you would like to get started buying Bitcoin, one of the easiest ways is opening a Coinbase account. You can set up a set up a Coinbase account at: https://www.coinbase.com/ You can also download the Coinbase App: For IOS: https://itunes.apple.com/us/app/coinbase-buy-bitcoin-more/id886427730?mt=8 For Android: https://play.google.com/store/apps/details?id=com.coinbase.android&hl=en I highly recommend the Google Authenticator app for extra security on your Coinbase account: For IOS: https://itunes.apple.com/us/app/google-authenticator/id388497605?mt=8 For Android: https://play.google.com/store/apps/details?id=com.google.android.apps.authenticator2&hl=en What is the Electrum Bitcoin Wallet? The Electrum Bitcoin wallet is software that runs on your computer. It is an application that allows you to send, receive and store bitcoins. It also has advanced features that allow you to check your current balance, see a list of transactions, and even maintain several “wallets”. It does this by allowing you to access a bitcoin address on the Bitcoin blockchain. Access to a Bitcoin address is provided by a cryptographic key-pair. The key-pair is a public/private asymmetric cryptographic key. The public key is the receiving address. This is the address you can share with others, so they can send you bitcoins. The private key is the part that allows you to send bitcoins. The Electrum Bitcoin software creates a new key-pair whenever you create a new wallet. It stores the private key on your computer. The private key is protected by on-disk encryption. Electrum will automatically decrypt the private key when you wish to send bitcoins. Access to the private key is also enhanced by a password or your own choosing that you can set when the wallet is created. Best practice is to choose a strong password for your Electrum Bitcoin Wallet. The Electrum Bitcoin Wallet is one of the most popular Bitcoin wallets for desktops. It has several advanced features that make it robust and flexible. It supports Two Factor Authentication, Multi-sig Wallets, and Cold Storage. Another unique feature of the Electrum Bitcoin Wallet is that it does not require you to download the entire Bitcoin Blockchain on to your computer (which can be time-consuming and requires a lot of space). It does this by maintaining several Blockchain servers which allow you to quickly access the current state of the Bitcoin Blockchain and the up-to-date status of the wallets you control. This includes your current balances and the transaction history for each of your wallets. What is Bitcoin? Bitcoin is a new technology that functions as a digital currency. It is a peer-based, decentralized way to hold, store, send, and receive value. It does this by maintaining a cryptographic “ledger” called the Blockchain. All of the bitcoins in existence are created and stored on the Blockchain. Bitcoin with a capital “B” refers to the technology itself. Bitcoin spelled with a little “b” refers to the tokens that hold the value and can be exchanged with others. Multiple copies of the Blockchain exist on thousands if not millions of computers worldwide. Each copy of the Blockchain “verifies” itself by connecting to the Internet and making sure it has the most up-to-date list of transactions. The Blockchain maintains its integrity by using strong, modern, encryption techniques. This makes it impossible for anyone to alter the ledger, create fake transaction or “double-spend” their bitcoins. Bitcoins do not require banks or third-party financial services to act as central clearing houses for electronic transfers. In essence, Bitcoin technology “cuts out the middleman”. Bitcoin is a decentralized, peer-to-peer monetary system that exists outside of the traditional, centralized, fiat-currency based financial system.
Views: 1587 Rex Kneisley

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