Search results “Computing discrete logs in cryptography for kids”

This is a segment of this full video:
https://www.youtube.com/watch?v=YEBfamv-_do
Diffie-Hellman key exchange was one of the earliest practical implementations of key exchange within the field of cryptography. It relies on the discrete logarithm problem. This test clip will be part of the final chapter of Gambling with Secrets!

Views: 453022
Art of the Problem

Views: 5382
Internetwork Security

This clip from the 2008 Royal Institution Christmas Lectures shows a simple demonstration of how two people can agree on a secret key, even though all of their communications are carried out in public. In the electronic world, secret key exchange allows computers to communicate securely, and is used, for example, when you give your credit card information to an on-line shop.
You can watch the 2008 Royal Institution Christmas Lectures in full at: http://research.microsoft.com/~cmbishop or by visiting the Royal Institution web site.
There is a dedicated web site to accompany the 2008 Christmas Lectures, with ten interactive games as well as downloadable PDF instructions for experiments which can be conducted at home or at school: http://www.rigb.org/christmaslectures08

Views: 142445
ProfChrisBishop

Why do we need public key cryptography?
Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/modern-crypt/v/discrete-logarithm-problem?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience
Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/modern-crypt/v/the-fundamental-theorem-of-arithmetic-1?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: 131208
Khan Academy Labs

Examples of Fermat's theorem, Euler's totient and Euler's theorem, as well as discrete logarithms and primitive roots. Course material via: http://sandilands.info/sgordon/teaching

Views: 2062
Steven Gordon

For slides, a problem set and more on learning cryptography, visit www.crypto-textbook.com.
The book chapter "Introduction" for this video is also available for free at the website (click "Sample Chapter").

Views: 460102
Introduction to Cryptography by Christof Paar

WPA3 security enhancements will likely include Opportunistic Wireless Encryption (OWE) and Dragonfly protocols. An understanding of Discrete Logarithm Cryptosystem (DLC) using elliptic curves is key to follow the workings of OWE and Dragonfly protocols. This is the first of four videos that reviews the security enhancements of WPA3.

Views: 1980
Mojo Networks

Modular Arithmetic is a fundamental component of cryptography. In this video, I explain the basics of modular arithmetic with a few simple examples.
Learn Math Tutorials Bookstore http://amzn.to/1HdY8vm
Donate - http://bit.ly/19AHMvX
STILL NEED MORE HELP?
Connect one-on-one with a Math Tutor. Click the link below:
https://trk.justanswer.com/aff_c?offer_id=2&aff_id=8012&url_id=232
:)

Views: 173132
Learn Math Tutorials

Hello Dosto
Aaj hum baat karenge cryptography ke bare me ki ye kya hota hai aur iska itemaal kaise aur kaha hota hai. iska sambandh kisi bhi data ya message ko safely pohchane se hota hai aur uski security badhayi jati hai taaki bich me koi an-adhikarik tarike se usko access na kar paye. aasha karta hoo apko ye video pasand ayegi agar aapko ye video achhi lage to isse like kare aur apne dosto ke sath share kare aur abhi tak aapne mera channel subscribe nahi kia hai to jarur is channel ko subscribe kare.
Subscribe to my channel for more videos like this and to support my efforts.
Thanks and Love #TechnicalSagar
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Views: 105242
Technical Sagar

2018 Program for Women and Mathematics
Topic: Mathematical Ideas in Lattice Based Cryptography
Speaker: Jill Pipher
Affiliation: Brown University
Date: May 21, 2018
For more videos, please visit http://video.ias.edu

Views: 803
Institute for Advanced Study

The 3rd Bar-Ilan Winter School on Cryptography: Bilinear Pairings in Cryptography, which was held between February 4th - 7th, 2013.
The event's program: http://crypto.biu.ac.il/winterschool2013/schedule2013.pdf
For All 2013 Winter school Lectures: http://www.youtube.com/playlist?list=PLXF_IJaFk-9C4p3b2tK7H9a9axOm3EtjA&feature=mh_lolz
Dept. of Computer Science: http://www.cs.biu.ac.il/
Bar-Ilan University: http://www1.biu.ac.il/indexE.php

Views: 8290
barilanuniversity

Website + download source code @ http://www.zaneacademy.com | typo in server display corrected here https://youtu.be/6C5sq5TaVMs?t=90
00:08 demo prebuilt version of the application
04:20 what discrete logarithm problem(s) does Eve need to solve
[typo correction in server console] s(congruent)B^a mod p
[typo correction in server console] s(congruent)A^b mod p
05:00 quick intro to Diffie Hellman Key Exchange (DHKE)
06:00 what is a group
7:30 what is a cyclic group
7:50 what is a group generator
09:08 DHKE proof
10:12 what is the Discrete Logarithm Problem
10:51 what is the Diffie Hellman Problem
11:55 what is the generalized discrete logarithm problem
12:55 why 1 and p-1 are not included when picking the secret keys for both parties
14:30 start coding the application
17:35 coding the server side
22:25 coding the client side
26:54 initializing the domain params p and alpha
27:58 calculating the public key
28:45 calculating the common key
29:56 test running the application
[typo correction in server console] s (congruent) B^a mod p
[typo correction in server console] s (congruent) A^b mod p

Views: 2029
zaneacademy

A short video I put together that describes the basics of the Elliptic Curve Diffie-Hellman protocol for key exchanges.

Views: 123488
Robert Pierce

Link to My Blog:- http://techdjdey.blogspot.in/
Video Editor used:- HitFilm 4 Express. https://hitfilm.com/
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PLEASE LIKE AND SHARE THIS VIDEO.
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Views: 2529
Dhrubajyoti Dey

I have a LocalCrypto.sol library(i.e. all in solidity) that supports El Gamal Encryption, One out of Two ZKP (i.e. either yes or no is encrypted), Pederson Commitments, Inequality proof (i.e. two commitments DO NOT commit to the same data), Equality proofs (i.e. two commitments DO commit to the same data), Discrete log equality proofs, and publicly verifiable secret sharing. I’m currently organising the code for public release (let others experiment with cryptography on the blockchain) – i’d like to present the library, its capability, some projects I have used it in and how people can start using it today.
Patrick McCorry is a Research Associate working with Sarah Meiklejohn at University College London. He previously worked with Andrew Miller at University of Illinois at Urbana Champaign (UIUC), and completed his PhD with Feng Hao at Newcastle University. His work focuses on cryptographic applications of the blockchain (i.e, e-voting over the blockchain).

Views: 994
Ethereum Foundation

A solution to a typical exam question. See my other videos
https://www.youtube.com/channel/UCmtelDcX6c-xSTyX6btx0Cw/.

Views: 307643
Randell Heyman

Using the repeated squaring algorithm to calculate 2^300 mod 50.

Views: 98805
GVSUmath

In this lecture series, you will be learning about cryptography basic concepts and examples related to it. Elliptic Curve (ECC) with example (ECC) with example.

Views: 27558
Eezytutorials

For slides, a problem set and more on learning cryptography, visit www.crypto-textbook.com

Views: 28793
Introduction to Cryptography by Christof Paar

The history behind public key cryptography & the Diffie-Hellman key exchange algorithm.
We also have a video on RSA here: https://www.youtube.com/watch?v=wXB-V_Keiu8

Views: 644880
Art of the Problem

Views: 3566
Internetwork Security

What is CRYPTOGRAPHIC SPLITTING? What does CRYPTOGRAPHIC SPLITTING mean? CRYPTOGRAPHIC SPLITTING definition - CRYPTOGRAPHIC SPLITTING explanation.
Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license.
SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ
Cryptographic splitting, also known as cryptographic bit splitting or cryptographic data splitting, is a technique for securing data over a computer network. The technique involves encrypting data, splitting the encrypted data into smaller data units, distributing those smaller units to different storage locations, and then further encrypting the data at its new location. With this process, the data is protected from security breaches, because even if an intruder is able to retrieve and decrypt one data unit, the information would be useless unless it can be combined with decrypted data units from the other locations.
The technology was filed for patent consideration in June 2003, and the patent was granted in June 2008.
Cryptographic splitting utilizes a combination of different algorithms to provide the data protection. A block of data is first encrypted using the AES-256 government encryption standard. The encrypted bits are then split into different shares and then each share is hashed using the National Security Agency's SHA-256 algorithm.
One application of cryptographic splitting is to provide security for cloud computing. The encrypted data subsets can be stored on different clouds, with the information required to restore the data being held on a private cloud for additional security. Security vendor Security First Corp uses this technology for its Secure Parser Extended (SPx) product line.
In 2009, technology services company Unisys gave a presentation about using cryptographic splitting with storage area networks. By splitting the data into different parts of the storage area network, this technique provided data redundancy in addition to security.
Computer giant IBM has written about using the technology as part of its Cloud Data Encryption Services (ICDES).
The technology has also been written about in the context of more effectively using sensitive corporate information, by entrusting different individuals within a company (trustees) with different parts of the information.

Views: 257
The Audiopedia

The 3rd Bar-Ilan Winter School on Cryptography: Bilinear Pairings in Cryptography, which was held between February 4th - 7th, 2013.
The event's program: http://crypto.biu.ac.il/winterschool2013/schedule2013.pdf
For All 2013 Winter school Lectures: http://www.youtube.com/playlist?list=PLXF_IJaFk-9C4p3b2tK7H9a9axOm3EtjA&feature=mh_lolz
Dept. of Computer Science: http://www.cs.biu.ac.il/
Bar-Ilan University: http://www1.biu.ac.il/indexE.php

Views: 2654
barilanuniversity

In this episode of 'Ask the Professor," Prof. Nigel Smart talks about Yao's Millionaire Problem (how to reveal who is the richest millionaire w/out revealing how much money they actually have), in the case of two or more parties. Additionally, what do you do if the message is longer than the keystream? And finally, how and when should one study cryptography? Prof. Nigel Smart gives us all the details!
In the 'Ask the Professor' video series, Professor Nigel Smart, a world-renowned expert in applied cryptography, and professor at the COSIC group at the KU Leuven was Vice President of the International Association for Cryptologic Research and a fellow of the IACR. Prof. Smart 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.
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). Unbound applies revolutionary breakthroughs in mathematics to allow secrets to be used without ever being exposed, thus ensuring digital assets are safe – anytime, anywhere. Reinventing the future of security and privacy, Unbound enables business to deliver a new world of digital products and services with unprecedented speed and scale which were previously beyond reach. At the heart of Unbound, formerly known as Dyadic, lie sophisticated applications of Multi-Party Computation (MPC), developed by Unbound’s co-founders, Professor Yehuda Lindell and Professor Nigel Smart, world-renowned cryptographers.

Views: 987
Unbound Tech

Learn more advanced front-end and full-stack development at: https://www.fullstackacademy.com
Elliptic Curve Cryptography (ECC) is a type of public key cryptography that relies on the math of both elliptic curves as well as number theory. This technique can be used to create smaller, faster, and more efficient cryptographic keys. In this Elliptic Curve Cryptography tutorial, we introduce the mathematical structure behind this new algorithm.
Watch this video to learn:
- What Elliptic Curve Cryptography is
- The advantages of Elliptic Curve Cryptography vs. old algorithms
- An example of Elliptic Curve Cryptography

Views: 13462
Fullstack Academy

Computer Science/Discrete Mathematics Seminar II
Topic: Sum of squares, quantum entanglement, and log rank
Speaker: David Steurer
Affiliation: Cornell University; Member, School of Mathematics
Date: Oct 25, 2016
For more video, visit http://video.ias.edu

Views: 1668
Institute for Advanced Study

Trapdoor functions have proven fairly difficult to find. Most modern cryptosystems—including RSA—are based on factoring. Given two very large prime numbers it is easy to multiply them together to create a third number that has only two factors. But given that third number it is very hard to determine what it’s two factors are. This asymmetry is the basis of modern cryptography and most of our online security. If anyone ever determines how to quickly factor huge numbers, it will have enormous and incredibly disruptive societal consequences.
Credits: Talking: Geoffrey Challen (Assistant Professor, Computer Science and Engineering, University at Buffalo). Producing: Greg Bunyea (Undergraduate, Computer Science and Engineering, University at Buffalo).
Part of the https://www.internet-class.org online internet course. A blue Systems Research Group (https://blue.cse.buffalo.edu) production.

Views: 368
internet-class

Introduction to Cryptography - I
=====================
Materials (video, slides, english subtitles) from / Stanford Introduction to Cryptography
Slides & Subtitle Link:
http://www.mediafire.com/file/rr8pnxag9kpe3g7/Crypto-I.rar/file
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. Throughout the course participants will be exposed to many exciting open problems in the field and work on fun (optional) programming projects. In a second course (Crypto II) we will cover more advanced cryptographic tasks such as zero-knowledge, privacy mechanisms, and other forms of encryption.
SKILLS YOU WILL GAIN During the 66 Video in this Course:
1 - Cryptography,
2 - Cryptographic Attacks,
3 - Public-Key Cryptography,
4 - Symmetric-Key Algorithm,

Views: 1541
TO Courses

Eleventh IACR Theory of Cryptography Conference TCC 2014
February 24-26, 2014
Russell Impagliazzo (UCSD)

Views: 442
Calit2ube

This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.

Views: 65397
Udacity

ECC2K-130 is the smallest unsolved Certicom discrete-logarithm challenge. Certicom originally stated that breaking ECC2K-130 was 'infeasible' and would require 2700000000 machine days. This talk reports on an ongoing joint project by researchers from 12 different universities to break ECC2K-130. The project has increased our knowledge of the mathematical speedups for attacking elliptic-curve cryptosystems, has led to a new representation for finite fields in 'optimal polynomial bases', and has led to a better understanding of the randomness of pseudorandom walks used in Pollard's rho method. The project has produced optimized implementations of a highly tuned iteration function for different platforms ranging from standard CPUs to customized FPGA clusters. These optimizations have moved the ECC2K-130 computation to the range of feasibility. The computation would finish in only two years using 1595 standard PCs, or 1231 PlayStation 3 game consoles, or 534 GTX 295 graphics cards, or 308 XC3S5000 FPGAs, or any combination of the above. We are now actively performing the computations. See our twitter page for updates.

Views: 298
Microsoft Research

Hosts: Steve Gibson with Leo Laporte
UPEK fingerprint software, Oracle software patch, ECC, and more.
Download or subscribe to this show at twit.tv/sn.
We invite you to read, add to, and amend our show notes.
You can submit a question to Security Now! at the GRC Feedback Page.
For 16kpbs versions, transcripts, and note s (including fixes), visit Steve's site: grc.com, also the home of the best disk maintenance and recovery utility ever written Spinrite 6.
Audio bandwidth is provided by Winamp, subscribe to TWiT and all your favorite podcasts with the ultimate media player, download it for free at Winamp.com.
Running time: 1:23:41

Views: 2120
TWiT Netcast Network

For slides, a problem set and more on learning cryptography, visit www.crypto-textbook.com

Views: 83116
Introduction to Cryptography by Christof Paar

This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.

Views: 420
Udacity

Cryptography and Network Security by Prof. D. Mukhopadhyay, Department of Computer Science and Engineering, IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in

Views: 4710
nptelhrd

This a demo on using a delphi library to build pairings-based applications (Id-based crypto-systems, short signatures, attribute-based encryption, searcheable encryption .........)
[email protected]

Views: 142
kamel mohammed

This is part 5 of the Blockchain tutorial explaining what symmetric keys and asymmetric keys are.
In this video series different topics will be explained which will help you to understand blockchain.
Bitcoin released as open source software in 2009 is a cryptocurrency invented by Satoshi Nakamoto (unidentified person or group of persons).
After the introduction of Bitcoin many Bitcoin alternatives were created. These alternate cryptocurrencies are called Altcoins (Litecoin, Dodgecoin etc).
Bitcoin's underlying technology is called Blockchain.
The Blockchain is a distributed decentralized incorruptible database (ledger) that records blocks of digital information. Each block contains a timestamp and a link to a previous block.
Soon people realises that there many other use cases where the Blockchain technology can be applied and not just as a cryptocurrency application.
New Blockchain platforms were created based on the Blockchain technology, one of which is called Ethereum.
Ethereum focuses on running programming code, called smart contracts, on any decentralized application.
Using the new Blockchain platforms, Blockchain technology can be used in supply chain management, healthcare, real estate, identity management, voting, internet of things, etcetera, just to name a few.
Today there is a growing interest in Blockchain not only in the financial sector but also in other sectors.
Explaining how Blockchain works is not easy and for many the Blockchain technology remains an elusive concept.
This video series tries to explain Blockchain to a large audience but from the bottom up.
Keywords often used in Blockchain conversation will be explained.
Each Blockchain video is short and to the point.
It is recommended to watch each video sequentially as I may refer to certain Blockchain topics explained earlier.
Check out all my other Blockchain tutorial videos
https://goo.gl/aMTFHU
Subscribe to my YouTube channel
https://goo.gl/61NFzK
The presentation used in this video tutorial can be found at:
http://www.mobilefish.com/developer/blockchain/blockchain_quickguide_tutorial.html
#mobilefish #blockchain #bitcoin #cryptocurrency #ethereum

Views: 8425
Mobilefish.com

Fundamentals of Computer Network Security
This specialization in intended for IT professionals, computer programmers, managers, IT security professionals who like to move up ladder, who are seeking to develop network system security skills. Through four courses, we will cover the Design and Analyze Secure Networked Systems, Develop Secure Programs with Basic Cryptography and Crypto API, Hacking and Patching Web Applications, Perform Penetration Testing, and Secure Networked Systems with Firewall and IDS, which will prepare you to perform tasks as Cyber Security Engineer, IT Security Analyst, and Cyber Security Analyst.
course 2 Basic Cryptography and Programming with Crypto API:
About this course: In this MOOC, we will learn the basic concepts and principles of cryptography, apply basic cryptoanalysis to decrypt messages encrypted with mono-alphabetic substitution cipher, and discuss the strongest encryption technique of the one-time-pad and related quantum key distribution systems. We will also learn the efficient symmetric key cryptography algorithms for encrypting data, discuss the DES and AES standards, study the criteria for selecting AES standard, present the block cipher operating modes and discuss how they can prevent and detect the block swapping attacks, and examine how to defend against replay attacks. We will learn the Diffie-Hellman Symmetric Key Exchange Protocol to generate a symmetric key for two parties to communicate over insecure channel. We will learn the modular arithmetic and the Euler Totient Theorem to appreciate the RSA Asymmetric Crypto Algorithm, and use OpenSSL utility to realize the basic operations of RSA Crypto Algorithm. Armed with these knowledge, we learn how to use PHP Crypto API to write secure programs for encrypting and decrypting documents and for signing and verify documents. We then apply these techniques to enhance the registration process of a web site which ensures the account created is actually requested by the owner of the email account.
Asymmetric Key Cryptography
In this module we will learn the modular arithmetic, the Euler Totient Theorm, the RSA Asymmetric Crypto Algorithm, use OpenSSL to realize the basic operations of RSA Crypto Algorithm, and Diffie-Hellman Symmetric Key Exchange Protocol to derive session keys.
Learning Objectives
• Use Diffi-Hellman algorithm for Key Exchange
• Apply RSA with OpenSSL for signing and encryption
• Describe RSA Asymmetric Crypto Algorithm
Subscribe at: https://www.coursera.org

Views: 174
intrigano

In this tutorial, I demonstrate two different approaches to multiplying numbers in modular arithmetic.
Learn Math Tutorials Bookstore http://amzn.to/1HdY8vm
Donate - http://bit.ly/19AHMvX
STILL NEED MORE HELP?
Connect one-on-one with a Math Tutor. Click the link below:
https://trk.justanswer.com/aff_c?offer_id=2&aff_id=8012&url_id=232
:)

Views: 36650
Learn Math Tutorials

Public key cryptography and digital signatures. Lecture 6 of ITS335 IT Security at Sirindhorn International Institute of Technology, Thammasat University. Given on 28 November 2013 at Bangkadi, Pathumthani, Thailand by Steven Gordon. Course material via: http://sandilands.info/sgordon/teaching

Views: 1971
Steven Gordon

What is PUBLIC-KEY CRYPTOGRAPHY? What does PUBLIC-KEY CRYPTOGRAPHY mean? PUBLIC-KEY CRYPTOGRAPHY meaning - PUBLIC-KEY CRYPTOGRAPHY definition - PUBLIC-KEY CRYPTOGRAPHY explanation.
Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license.
Public-key cryptography, or asymmetric cryptography, is any cryptographic system that uses pairs of keys: public keys that may be disseminated widely paired with private keys which are known only to the owner. There are two functions that can be achieved: using a public key to authenticate that a message originated with a holder of the paired private key; or encrypting a message with a public key to ensure that only the holder of the paired private key can decrypt it.
In a public-key encryption system, any person can encrypt a message using the public key of the receiver, but such a message can be decrypted only with the receiver's private key. For this to work it must be computationally easy for a user to generate a public and private key-pair to be used for encryption and decryption. The strength of a public-key cryptography system relies on the degree of difficulty (computational impracticality) for a properly generated private key to be determined from its corresponding public key. Security then depends only on keeping the private key private, and the public key may be published without compromising security.
Public-key cryptography systems often rely on cryptographic algorithms based on mathematical problems that currently admit no efficient solution—particularly those inherent in certain integer factorization, discrete logarithm, and elliptic curve relationships. Public key algorithms, unlike symmetric key algorithms, do not require a secure channel for the initial exchange of one (or more) secret keys between the parties.
Because of the computational complexity of asymmetric encryption, it is usually used only for small blocks of data, typically the transfer of a symmetric encryption key (e.g. a session key). This symmetric key is then used to encrypt the rest of the potentially long message sequence. The symmetric encryption/decryption is based on simpler algorithms and is much faster.
Message authentication involves hashing the message to produce a "digest," and encrypting the digest with the private key to produce a digital signature. Thereafter anyone can verify this signature by (1) computing the hash of the message, (2) decrypting the signature with the signer's public key, and (3) comparing the computed digest with the decrypted digest. Equality between the digests confirms the message is unmodified since it was signed, and that the signer, and no one else, intentionally performed the signature operation — presuming the signer's private key has remained secret. The security of such procedure depends on a hash algorithm of such quality that it is computationally impossible to alter or find a substitute message that produces the same digest - but studies have shown that even with the MD5 and SHA-1 algorithms, producing an altered or substitute message is not impossible. The current hashing standard for encryption is SHA-2. The message itself can also be used in place of the digest.
Public-key algorithms are fundamental security ingredients in cryptosystems, applications and protocols. They underpin various Internet standards, such as Transport Layer Security (TLS), S/MIME, PGP, and GPG. Some public key algorithms provide key distribution and secrecy (e.g., Diffie–Hellman key exchange), some provide digital signatures (e.g., Digital Signature Algorithm), and some provide both (e.g., RSA).
Public-key cryptography finds application in, among others, the information technology security discipline, information security. Information security (IS) is concerned with all aspects of protecting electronic information assets against security threats. Public-key cryptography is used as a method of assuring the confidentiality, authenticity and non-repudiability of electronic communications and data storage.

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The Audiopedia

Spring 2018 Cryptography & Cryptanalysis
Prof. Vinod Vaikuntanathan

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Andrew Xia

format preserving encryption
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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.

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intrigano

What is CRYPTOGRAPHIC MESSAGE SYNTAX? What does CRYPTOGRAPHIC MESSAGE SYNTAX mean? CRYPTOGRAPHIC MESSAGE SYNTAX meaning - CRYPTOGRAPHIC MESSAGE SYNTAX definition - CRYPTOGRAPHIC MESSAGE SYNTAX explanation.
Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license.
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The Cryptographic Message Syntax (CMS) is the IETF's standard for cryptographically protected messages. It can be used to digitally sign, digest, authenticate or encrypt any form of digital data.
CMS is based on the syntax of PKCS#7, which in turn is based on the Privacy-Enhanced Mail standard. The newest version of CMS (as of 2009) is specified in RFC 5652 (but see also RFC 5911 for updated ASN.1 modules conforming to ASN.1 2002).
The architecture of CMS is built around certificate-based key management, such as the profile defined by the PKIX working group.
CMS is used as the key cryptographic component of many other cryptographic standards, such as S/MIME, PKCS #12 and the RFC 3161 Digital timestamping protocol.
OpenSSL is open source software that can encrypt, decrypt, sign and verify, compress and uncompress CMS documents.

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The Audiopedia

A simple 10-minute introduction to ciphers and cryptographic fundamentals. Topics include Caesar ciphers, algorithms and keys, cipher disks, and modular arithmetic. The video ends with an example of code cracking with frequency analysis.

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cryptosmith

© 2019 Swiftmailer transport options

Business continuity resources may include spare or redundant systems that serve as a backup in case primary systems fail. Systems for crisis communications may include existing voice and data technology for communicating with customers, employees and others. Equipment. Equipment includes the means for teams to communicate. Radios, smartphones, wired telephone and pagers may be required to alert team members to respond, to notify public agencies or contractors and to communicate with other team members to manage an incident. Many tools may be required to prepare a facility for a forecast event such as a hurricane, flooding or severe winter storm. Materials and Supplies. Materials and supplies are needed to support members of emergency response, business continuity and crisis communications teams. Food and water are basic provisions. Systems and equipment needed to support the preparedness program require fuel. Emergency generators and diesel engine driven fire pumps should have a fuel supply that meets national standards or local regulatory requirements. That means not allowing the fuel supply to run low because replenishment may not be possible during an emergency. Spare batteries for portable radios and chargers for smartphones and other communications devices should be available. Funding. Worksheets.