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symmetric key cryptography
 
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https://8gwifi.org/CipherFunctions.jsp Reference book: http://leanpub.com/crypto Cryptographic Algorithms generally fall into one of two different categories, or are a combination of both. Symmetric Fast Only provide confidentiality Examples: DES, AES, Blowfish, RC4, RC5 Asymmetric Large mathematical operations make it slower than symmetric algorithms No need for out of band key distribution (public keys are public!) Scales better since only a single key pair needed per individual Can provide authentication and nonrepudiation Examples: RSA, El Gamal, ECC, Diffie-Hellman problem with symmetric key cryptography DES (Data Encryption Standard) 64 bit key that is effectively 56 bits in strength Actual algorithm is called DEA (Data Encryption Algorithm) DES Modes Electronic Code Book Cipher Block Chaining (most commonly used for general purpose encryption) Cipher Feedback Output Feedback Counter Mode (used in IPSec) 3DES 112-bit effective key length Uses either 2 or 3 different smaller keys in one of several modes Modes EEE2/3 EDE2/3 AES NIST replaced DES in 1997 with this Uses the Rijndael algorithm Supports key/block sizes of 128, 192, and 256 bits Uses 10/12/14 rounds as block size increases IDEA (International Data Encryption Algorithm) Operates on 64 bit blocks in 8 rounds with 128 bit key Considered stronger than DES and is used in PGP Blowfish 64 bit block cipher with up to 448 bit key and 16 rounds Designed by Bruce Schneier RC4 Stream cipher with variable key size created by Ron Rivest RC5 Another Rivest cipher Block cipher with 32/64/128 bit blocks and keys up to 2048 bits RC6 Beefier version of RC5 submitted as AES candidate CAST 64 bit block cipher with keys between 40-128 bits with 12-16 rounds depending on key length CAST-256 used 128-bit blocks and keys from 128-256 bits using 48 rounds SAFER (Secure and Fast Encryption Routine) Set of patent-free algorithms in 64 and 128 bit block variants Variation used in Bluetooth Twofish Adapted version of Blowfish with 128 bit blocks, 128-256 bit keys and 16 rounds AES Finalist Kryptografie mit symmetrischem Schlüssel symmetric key cryptography symmetric key cryptography tutorial symmetric key cryptography example symmetric key cryptography vs asymmetric key cryptography symmetric and asymmetric key cryptography symmetric key cryptography Kryptografie mit symmetrischem Schlüssel Kryptographie mit symmetrischem Schlüssel Kryptographie mit symmetrischem Schlüssel Kryptografie mit symmetrischem Schlüssel und asymmetrische Schlüsselkryptographie symmetrische und asymmetrische Schlüsselkryptographie Kryptografie mit symmetrischem Schlüssel
Views: 39938 Zariga Tongy
AskDeveloper Podcast - 47 - Cryptography - Part 2 - Encryption
 
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الحلقة السابقة https://www.youtube.com/watch?v=FcKxlOuGq2U ○ Encryption (Two Ways) § Symmetric Encryption □ Same key both encrypts and decrypts the data. □ Very fast, yet exchanging key is tricky □ Very Algorithmic □ Examples ® DES Data Encryption Standard (BROKEN) ◊ Uses key of 56 bit length ® Triple DES (3DES) ◊ Uses three keys (or two unique keys) of 56 bit each ® AES Advanced Encryption Standard ◊ Uses keys of 128, 192 or 256 bits long □ Attacks ® Brute force ◊ Usually mitigated via increasing key length, as difficulty increases exponentially as key size increases, for example time to crack given a modern super computer. Key Size Time To Crack 56 bits 399 seconds 128 bits 1.02 * 1018 years 192 bits 1.87 * 1037 years 256 bits 3.31 * 1056 years ◊ Side-Channel Attacks § Asymmetric Encryption □ Key pairs have mathematical relationship □ Each one can decrypt messages encrypted by the other. □ Slow, but exchanging key is trivial □ Very Mathematical □ Anyone can know the Public Key ® The Public key can only be used to encrypt data □ The Private key is kept secret, and never leaves the recipient's side. ® The Private key can only be used to decrypt data □ Examples ® RSA (Rivest, Shamir and Adelman) ® The de-facto standard in the industry ® Public and Private keys are based on large Prime Numbers § Hybrid Encryption □ Uses both Symmetric and Asymmetric encryption at the same time. □ Goals: ® Use the performance of Symmetric Crypto ® Convenience of sharing keys using Asymmetric Crypto ® HMAC for authentication. □ Steps: (Order is very important) ® Party 1 (Alice) 1. Generates a random AES Session Key (32 bytes / 256 bits) 2. Generates a random Initialization Vector (IV) (16 bytes / 128 bits) 3. Encrypt the message to be sent using the AES Session Key & IV 4. Calculate an HMAC of the encrypted message using the AES Session key 5. Encrypt the AES Session Key using the Public Key of Party 2 (Bob) The recipient. 6. Sends a packet of (Encrypted Message, Encrypted Session Key, Initialization Vector, and HMAC) to Bob ® Party 2 (Bob) 1. Decrypts Session key using his Private Key 2. Recalculates the HMAC of the encrypted message (Validates message integrity) } If HMAC check pass – Decrypts the message using the decrypted AES Session Key and Initialization Vector } Otherwise, rejects the message because of integrity check failure. Our facebook Page http://facebook.com/askdeveloper On Sound Cloud http://soundcloud.com/askdeveloper Please Like & Subscribe
Views: 713 Mohamed Elsherif
An advanced XOR encryption for image  | Image Processing #9 | HBY coding academic
 
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This video introduces an encryption technique === XOR encryption === the main concept is described below key ⊕ secret = cipher cipher ⊕ key = secret If you have any questions or suggestions Welcome to comment below~ 這支影片將介紹一個加密的技術 === XOR 加密 === 其主要概念如下: 鑰匙⊕秘密=祕文 祕文⊕鑰匙=秘密 如有任何問題或意見,歡迎在下方留言討論~
Views: 120 HBY coding academic
Encryption
 
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Encryption is the process of using an algorithm to transform information to make it unreadable for unauthorized users. This cryptographic method protects sensitive data such as credit card numbers by encoding and transforming information into unreadable cipher text. This encoded data may only be decrypted or made readable with a key. Symmetric-key and asymmetric-key are the two primary types of encryption. Encryption is essential for ensured and trusted delivery of sensitive information. Symmetric-key encryption uses two secret, often identical keys or codes for computers involved in message transmission. Each secret key's data packet is self-encrypted. The first symmetric encryption algorithm is the Data Encryption Standard (DES), which uses a 56-bit key and is not considered attack-proof. The Advanced Encryption Standard (AES) is considered more reliable because it uses a 128-bit, a 192-bit or a 256-bit key. Asymmetric-key encryption, also known as public-key encryption, uses private and public keys in tandem. The public key is shared with computers attempting to communicate securely with the user’s computer. This key handles encryption, rendering the message indecipherable in transit. The private matching key remains private on the user’s computer. It decrypts the message and makes it readable. Pretty good privacy (PGP) is a commonly used public-key encryption system.
Views: 3 Information Tech
Triple DES
 
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Triple DES In cryptography, Triple DES (3DES) is the common name for the Triple Data Encryption Algorithm (TDEA or Triple DEA) symmetric-key block cipher, which applies the Data Encryption Standard (DES) cipher algorithm three times to each data block.The original DES cipher's key size of 56 bits was generally sufficient when that algorithm was designed, but the availability of increasing computational power made brute-force attacks feasible. -Video is targeted to blind users Attribution: Article text available under CC-BY-SA image source in video https://www.youtube.com/watch?v=78qOtd4yi74
Views: 2012 WikiAudio
Data Encryption Standard DES Algorithm
 
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The encryption methods described are symmetric key block ciphers. Data Encryption Standard (DES) is the predecessor, encrypting data in 64-bit blocks using a 56 bit key. This Video provide detailed information about DES Steps. 1.Initial Permutation 2.16 Rounds 3.Left-Right Swap 4.Final Permutation ==================== Like==Comment=Share ==================== If you have any problem just comment it.
Views: 3429 Tech Guru
Fileencryptioncryptool,05.11Nov.2018
 
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Symmetric algos- Block Ciphers and Stream Ciphers Block Ciphers- Each block of plaintext is processed by encryption algorithm.. 1 block=64 bits eg-128 bits input plaintext 2 blocks 2. Stream Ciphers- Bit by bit encryption or byte by byte encryption. Various Algorithms 1. Substitution - Replacement of characters by other characters. a. CAESAR CIPHER b. PLAYFAIR CIPHER c. HILL CIPHER 2. TRANSPOSITION- Changing the positions of the characters of the plaintext. a. RAIL FENCE TECHNIQUE b. SIMPLE COLUMNAR TECHNIQUE c. VERNAM CIPHER MODERN SYMMETRIC CIPHERS- 1. DES-Data Encryption Standard-Block Cipher Input plaintext -64 bits Key length-56 bits Number of rounds-16 Output Ciphertext-64 bits 2. Double DES-Two times the DES algorithm will be used. Input Plaintext-64 bits Number of keys- 2 keys each of 56 bits. Number of Rounds-16 Output Ciphertext-64 bits 3. TRIPLE DES -Three times the DES Algorithm will be applied. Input -64 bits Number of keys used-2 keys each of 56 bits Number of Rounds-16 Output Ciphertext-64 bits 4. IDEA- International Data Encryption Algorithm (licensed) Input PT-64 bits Key length- 128 bits Output CT- 64 bits Number of rounds-8 5. AES- Advanced Encryption Standard-Advanced DES -Block Cipher Input PT can be either 128 bits or 256 bits Key Length -either 128 bits or 192 bits or 256 bits Number of rounds - Minimum -10 ,Maximum -14 Output CT- either 128 bits or 256 bits. 6. RC-5 Rivest Cipher 5 is a Stream Cipher. Input Plaintext can be 0 to 255 bits Key -0 to 255 bits Rounds -10 to 14 https://drive.google.com/file/d/1wbGU1Jp6ZvAtiTYqLMMbqyGtm-jS0l0V/view?usp=sharing
Views: 1 jam pakse
CryptooldemoAES,05.11Nov.2018
 
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Symmetric algos- Block Ciphers and Stream Ciphers Block Ciphers- Each block of plaintext is processed by encryption algorithm.. 1 block=64 bits eg-128 bits input plaintext 2 blocks 2. Stream Ciphers- Bit by bit encryption or byte by byte encryption. Various Algorithms 1. Substitution - Replacement of characters by other characters. a. CAESAR CIPHER b. PLAYFAIR CIPHER c. HILL CIPHER 2. TRANSPOSITION- Changing the positions of the characters of the plaintext. a. RAIL FENCE TECHNIQUE b. SIMPLE COLUMNAR TECHNIQUE c. VERNAM CIPHER MODERN SYMMETRIC CIPHERS- 1. DES-Data Encryption Standard-Block Cipher Input plaintext -64 bits Key length-56 bits Number of rounds-16 Output Ciphertext-64 bits 2. Double DES-Two times the DES algorithm will be used. Input Plaintext-64 bits Number of keys- 2 keys each of 56 bits. Number of Rounds-16 Output Ciphertext-64 bits 3. TRIPLE DES -Three times the DES Algorithm will be applied. Input -64 bits Number of keys used-2 keys each of 56 bits Number of Rounds-16 Output Ciphertext-64 bits 4. IDEA- International Data Encryption Algorithm (licensed) Input PT-64 bits Key length- 128 bits Output CT- 64 bits Number of rounds-8 5. AES- Advanced Encryption Standard-Advanced DES -Block Cipher Input PT can be either 128 bits or 256 bits Key Length -either 128 bits or 192 bits or 256 bits Number of rounds - Minimum -10 ,Maximum -14 Output CT- either 128 bits or 256 bits. 6. RC-5 Rivest Cipher 5 is a Stream Cipher. Input Plaintext can be 0 to 255 bits Key -0 to 255 bits Rounds -10 to 14 https://drive.google.com/file/d/1wbGU1Jp6ZvAtiTYqLMMbqyGtm-jS0l0V/view?usp=sharing
Views: 2 jam pakse
Symmetric Key Ciphers
 
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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: 17808 nptelhrd
Symmetric Encryption Ciphers - CompTIA Security+ SY0-401: 6.2
 
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Security+ Training Course Index: http://professormesser.link/sy0401 Professor Messer’s Course Notes: http://professormesser.link/sy0401cn Frequently Asked Questions: http://professormesser.link/faq - - - - - The speed of symmetric encryption makes it a good choice for our high-speed networks. In this video, you’ll learn about RC4, DES, 3DES, AES, Blowfish, and Twofish. - - - - - Download entire video course: http://professormesser.link/401adyt Get the course on MP3 audio: http://professormesser.link/401vdyt Subscribe to get the latest videos: http://professormesser.link/yt Calendar of live events: http://www.professormesser.com/calendar/ FOLLOW PROFESSOR MESSER: Professor Messer official website: http://www.professormesser.com/ Twitter: http://www.professormesser.com/twitter Facebook: http://www.professormesser.com/facebook Instagram: http://www.professormesser.com/instagram Google +: http://www.professormesser.com/googleplus
Views: 30668 Professor Messer
C# Keywords AES Cryptography (Advanced Encryption Standard) P1
 
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The AES encryption is a symmetric cipher and uses the same key for encryption and decryption. The AES algorithm supports 128, 192 and 256 bit encryption, which is determined from the key size : 128 bit encryption when the key is 16 bytes, 192 when the key is 24 bytes and 256 bit when the key is 32 bytes. The methods provided by the library accept also a string password instead of a key, which is internally converted to a key with a chosen Hash function. The optional initialization vector (IV) size is 16 bytes, which is the block size of the algorithm. This is summarized in the table below: #selfhostwcf, #p2pnetworkprogramming,#netcorecommerce
Data Encryption Standard
 
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The Data Encryption Standard (DES, /ˌdiːˌiːˈɛs/ or /ˈdɛz/) is a previously predominant symmetric-key algorithm for the encryption of electronic data. It was highly influential in the advancement of modern cryptography in the academic world. Developed in the early 1970s at IBM and based on an earlier design by Horst Feistel, the algorithm was submitted to the National Bureau of Standards (NBS) following the agency's invitation to propose a candidate for the protection of sensitive, unclassified electronic government data. In 1976, after consultation with the National Security Agency (NSA), the NBS eventually selected a slightly modified version, which was published as an official Federal Information Processing Standard (FIPS) for the United States in 1977. The publication of an NSA-approved encryption standard simultaneously resulted in its quick international adoption and widespread academic scrutiny. Controversies arose out of classified design elements, a relatively short key length of the symmetric-key block cipher design, and the involvement of the NSA, nourishing suspicions about a backdoor. The intense academic scrutiny the algorithm received over time led to the modern understanding of block ciphers and their cryptanalysis. DES is now considered to be insecure for many applications. This is chiefly due to the 56-bit key size being too small; in January, 1999, distributed.net and the Electronic Frontier Foundation collaborated to publicly break a DES key in 22 hours and 15 minutes (see chronology). There are also some analytical results which demonstrate theoretical weaknesses in the cipher, although they are infeasible to mount in practice. The algorithm is believed to be practically secure in the form of Triple DES, although there are theoretical attacks. In recent years, the cipher has been superseded by the Advanced Encryption Standard (AES). Furthermore, DES has been withdrawn as a standard by the National Institute of Standards and Technology (formerly the National Bureau of Standards). This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video
Views: 1123 Audiopedia
Symmetric Algorithms - CompTIA Security+ SY0-501 - 6.2
 
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Security+ Training Course Index: http://professormesser.link/sy0501 Professor Messer’s Course Notes: http://professormesser.link/501cn Frequently Asked Questions: http://professormesser.link/faq - - - - - Symmetric ciphers are some of the most commonly used encryption methods on the Internet. In this video, you’ll learn about DES, 3DES, RC4, AES, Blowfish, and Twofish. - - - - - Subscribe to get the latest videos: http://professormesser.link/yt Calendar of live events: http://www.professormesser.com/calendar/ FOLLOW PROFESSOR MESSER: Professor Messer official website: http://www.professormesser.com/ Twitter: http://www.professormesser.com/twitter Facebook: http://www.professormesser.com/facebook Instagram: http://www.professormesser.com/instagram Google +: http://www.professormesser.com/googleplus
Views: 9953 Professor Messer
Cryptography: Crash Course Computer Science #33
 
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Today we’re going to talk about how to keep information secret, and this isn’t a new goal. From as early as Julius Caesar’s Caesar cipher to Mary, Queen of Scots, encrypted messages to kill Queen Elizabeth in 1587, theres has long been a need to encrypt and decrypt private correspondence. This proved especially critical during World War II as Allan Turing and his team at Bletchley Park attempted to decrypt messages from Nazi Enigma machines, and this need has only grown as more and more information sensitive tasks are completed on our computers. So today, we’re going to walk you through some common encryption techniques such as the Advanced Encryption Standard (AES), Diffie-Hellman Key Exchange, and RSA which are employed to keep your information safe, private, and secure. Note: In October of 2017, researchers released a viable hack against WPA2, known as KRACK Attack, which uses AES to ensure secure communication between computers and network routers. The problem isn't with AES, which is provably secure, but with the communication protocol between router and computer. In order to set up secure communication, the computer and router have to agree through what's called a "handshake". If this handshake is interrupted in just the right way, an attacker can cause the handshake to fault to an insecure state and reveal critical information which makes the connection insecure. As is often the case with these situations, the problem is with an implementation, not the secure algorithm itself. Our friends over at Computerphile have a great video on the topic: https://www.youtube.com/watch?v=mYtvjijATa4 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: 187784 CrashCourse
Cryptographic Attacks - CompTIA Security+ SY0-501 - 1.2
 
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Security+ Training Course Index: http://professormesser.link/sy0501 Professor Messer’s Course Notes: http://professormesser.link/501cn Frequently Asked Questions: http://professormesser.link/faq - - - - - If you can’t hack the user, you may be able to hack the cryptography. In this video, you’ll learn about some common cryptographic attacks. - - - - - Subscribe to get the latest videos: http://professormesser.link/yt Calendar of live events: http://www.professormesser.com/calendar/ FOLLOW PROFESSOR MESSER: Professor Messer official website: http://www.professormesser.com/ Twitter: http://www.professormesser.com/twitter Facebook: http://www.professormesser.com/facebook Instagram: http://www.professormesser.com/instagram Google +: http://www.professormesser.com/googleplus
Views: 32659 Professor Messer
Lecture 6: Data Encryption Standard (DES): Key Schedule and Decryption by Christof Paar
 
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For slides, a problem set and more on learning cryptography, visit www.crypto-textbook.com
Triple DES
 
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This video is part of the Udacity course "Intro to Information Security". Watch the full course at https://www.udacity.com/course/ud459
Views: 25672 Udacity
Triple DES
 
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In cryptography, Triple DES (3DES) is the common name for the Triple Data Encryption Algorithm (TDEA or Triple DEA) symmetric-key block cipher, which applies the Data Encryption Standard (DES) cipher algorithm three times to each data block. The original DES cipher's key size of 56 bits was generally sufficient when that algorithm was designed, but the availability of increasing computational power made brute-force attacks feasible. Triple DES provides a relatively simple method of increasing the key size of DES to protect against such attacks, without the need to design a completely new block cipher algorithm. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video
Views: 14657 Audiopedia
Data Encryption Standard
 
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This video is part of the Udacity course "Intro to Information Security". Watch the full course at https://www.udacity.com/course/ud459
Views: 51399 Udacity
How To Use Encryption? - Cybersecurity For You and Your Business EP #18
 
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What is encryption? Encryption is the most effective way to achieve data security. To read an encrypted file, you must have access to a secret key or password that enables you to decrypt it. Unencrypted data is called plain text ; encrypted data is referred to as cipher text. Different levels of encryption are 128 bit encryption 256 bit encryption 512 bit encryption How does encryption work? Encryption works by scrambling the original message with a very large digital number (key). This is done using advanced mathematics. Commercial-level encryption uses 128 bit key that is very, very hard to crack. The computer receiving the message knows the digital key and so is able to work out the original message. What are the different ways to use encryption? Triple DES Triple DES was designed to replace the original Data Encryption Standard (DES) algorithm, which hackers eventually learned to defeat with relative ease. At one time, Triple DES was the recommended standard and the most widely used symmetric algorithm in the industry. Triple DES uses three individual keys with 56 bits each. The total key length adds up to 168 bits, but experts would argue that 112-bits in key strength are more like it. Despite slowly being phased out, Triple DES still manages to make a dependable hardware encryption solution for financial services and other industries. 168 Bit in length RSA RSA is a public-key encryption algorithm and the standard for encrypting data sent over the internet. It also happens to be one of the methods used in our PGP and GPG programs. Unlike Triple DES, RSA is considered an asymmetric algorithm due to its use of a pair of keys. You’ve got your public key, which is what we use to encrypt our message, and a private key to decrypt it. The result of RSA encryption is a huge batch of mumbo jumbo that takes attackers quite a bit of time and processing power to break. Blowfish Blowfish is yet another algorithm designed to replace DES. This symmetric cipher splits messages into blocks of 64 bits and encrypts them individually. Blowfish is known for both its tremendous speed and overall effectiveness as many claims that it has never been defeated. Meanwhile, vendors have taken full advantage of its free availability in the public domain. Blowfish can be found in software categories ranging from e-commerce platforms for securing payments to password management tools, where it used to protect passwords. It’s definitely one of the more flexible encryption methods available. AES The Advanced Encryption Standard (AES) is the algorithm trusted as the standard by the U.S. Government and numerous organizations. Although it is extremely efficient in 128-bit form, AES also uses keys of 192 and 256 bits for heavy duty encryption purposes. AES is largely considered impervious to all attacks, with the exception of brute force, which attempts to decipher messages using all possible combinations in the 128, 192, or 256-bit cipher. Still, security experts believe that AES will eventually be hailed the de facto standard for encrypting data in the private sector. Can encryption be hacked? It can be hacked depending on what you consider being hacked. If you are not careful with your security code or password and keep it to simple. Then yes your data can be easily hacked. If you put a 16 complicated password or phrase as your security code then it will be much harder to hack into. What Encryption Software should you use http://encryption-software-review.toptenreviews.com/ FolderLock 7-Up and much more Resources http://www.storagecraft.com/blog/5-common-encryption-algorithms/ [email protected] http://www.knssconsulting.com Twitter: http://www.twitter.com/BrandonKrieger SnapChat: https://www.snapchat.com/add/brandonkrieger Google : http://www.gplus.to/brandonkrieger Facebook: http://www.facebook.com/brandonkrieger LinkedIn: http://www.linkedIn.com/in/BrandonKrieger Youtube: http://www.youtube.com/knssconsulting *********************************
Views: 172 Brandon Krieger
C# Tutorial 49: Encrypt data from simple string in C#
 
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visual C# Adding AES encryption to C# application Forms Application encryption encrypt- decrypt with AES using C# Forms Application Advanced Encryption Standard Rijndael cipher Forms Application C# - Simple AES encryption using Visual C# cryptographic encrypt my 128 bit string using AES encryption cryptography C#
Views: 46689 ProgrammingKnowledge
C# AES encryption usage in 6 min
 
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Learn to use C# AES encryption in 6 min
Views: 7586 Gaur Associates
What is KEY WHITENING? What does KEY WHITENING mean? KEY WHITENING meaning & explanation
 
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What is KEY WHITENING? What does KEY WHITENING mean? KEY WHITENING meaning - KEY WHITENING definition - KEY WHITENING 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 In cryptography, key whitening is a technique intended to increase the security of an iterated block cipher. It consists of steps that combine the data with portions of the key. The most common form of key whitening is xor-encrypt-xor -- using a simple XOR before the first round and after the last round of encryption. The first block cipher to use a form of key whitening is DES-X, which simply uses two extra 64-bit keys for whitening, beyond the normal 56-bit key of DES. This is intended to increase the complexity of a brute force attack, increasing the effective size of the key without major changes in the algorithm. DES-X's inventor, Ron Rivest, named the technique whitening. The cipher FEAL (followed by Khufu and Khafre) introduced the practice of key whitening using portions of the same key used in the rest of the cipher. Obviously this offers no additional protection from brute force attacks, but it can make other attacks more difficult. In a Feistel cipher or similar algorithm, key whitening can increase security by concealing the specific inputs to the first and last round functions. In particular, it is not susceptible to a meet-in-the-middle attack. This form of key whitening has been adopted as a feature of many later block ciphers, including AES, MARS, RC6, and Twofish.
Views: 59 The Audiopedia
C# Keywords AES Cryptography (Advanced Encryption Standard) P2
 
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The AES encryption is a symmetric cipher and uses the same key for encryption and decryption. The AES algorithm supports 128, 192 and 256 bit encryption, which is determined from the key size : 128 bit encryption when the key is 16 bytes, 192 when the key is 24 bytes and 256 bit when the key is 32 bytes. The methods provided by the library accept also a string password instead of a key, which is internally converted to a key with a chosen Hash function. The optional initialization vector (IV) size is 16 bytes, which is the block size of the algorithm. This is summarized in the table below: #selfhostwcf, #p2pnetworkprogramming,#netcorecommerce
Security of DES
 
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This video is part of the Udacity course "Intro to Information Security". Watch the full course at https://www.udacity.com/course/ud459
Views: 396 Udacity
Diffie Hellman Key Exchange in Hindi for Symmetric Key Encryption System – With Example
 
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Diffie Hellman Key Exchange in Hindi for Symmetric Key Encryption System – With Example Like FB Page - https://www.facebook.com/Easy-Engineering-Classes-346838485669475/ Complete Data Structure Videos - https://www.youtube.com/playlist?list=PLV8vIYTIdSna11Vc54-abg33JtVZiiMfg Complete Java Programming Lectures - https://www.youtube.com/playlist?list=PLV8vIYTIdSnbL_fSaqiYpPh-KwNCavjIr Previous Years Solved Questions of Java - https://www.youtube.com/playlist?list=PLV8vIYTIdSnajIVnIOOJTNdLT-TqiOjUu Complete DBMS Video Lectures - https://www.youtube.com/playlist?list=PLV8vIYTIdSnYZjtUDQ5-9siMc2d8YeoB4 Previous Year Solved DBMS Questions - https://www.youtube.com/playlist?list=PLV8vIYTIdSnaPiMXU2bmuo3SWjNUykbg6 SQL Programming Tutorials - https://www.youtube.com/playlist?list=PLV8vIYTIdSnb7av5opUF2p3Xv9CLwOfbq PL-SQL Programming Tutorials - https://www.youtube.com/playlist?list=PLV8vIYTIdSnadFpRMvtA260-3-jkIDFaG Control System Complete Lectures - https://www.youtube.com/playlist?list=PLV8vIYTIdSnbvRNepz74GGafF-777qYw4
Comparison of Encryption Algorithms
 
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This video is part of the Udacity course "Intro to Information Security". Watch the full course at https://www.udacity.com/course/ud459
Views: 1056 Udacity
The Mathematics of Diffie-Hellman Key Exchange | Infinite Series
 
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Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/donateinfi Symmetric keys are essential to encrypting messages. How can two people share the same key without someone else getting a hold of it? Upfront asymmetric encryption is one way, but another is Diffie-Hellman key exchange. This is part 3 in our Cryptography 101 series. Check out the playlist here for parts 1 & 2: https://www.youtube.com/watch?v=NOs34_-eREk&list=PLa6IE8XPP_gmVt-Q4ldHi56mYsBuOg2Qw Tweet at us! @pbsinfinite Facebook: facebook.com/pbsinfinite series Email us! pbsinfiniteseries [at] gmail [dot] com Previous Episode Topology vs. “a” Topology https://www.youtube.com/watch?v=tdOaMOcxY7U&t=13s Symmetric single-key encryption schemes have become the workhorses of secure communication for a good reason. They’re fast and practically bulletproof… once two parties like Alice and Bob have a single shared key in hand. And that’s the challenge -- they can’t use symmetric key encryption to share the original symmetric key, so how do they get started? Written and Hosted by Gabe Perez-Giz Produced by Rusty Ward Graphics by Ray Lux Assistant Editing and Sound Design by Mike Petrow and Meah Denee Barrington Made by Kornhaber Brown (www.kornhaberbrown.com) Thanks to Matthew O'Connor, Yana Chernobilsky, and John Hoffman who are supporting us on Patreon at the Identity level! And thanks to Nicholas Rose, Jason Hise, Thomas Scheer, Marting Sergio H. Faester, CSS, and Mauricio Pacheco who are supporting us at the Lemma level!
Views: 47313 PBS Infinite Series
DES -- The Algorithm
 
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DES -- Data Encryption Standard -- has been the workhorse of modern cryptography for many decades. It has never been compromised mathematically (not in the open literature, at least), yet, its design notes were never made public either. Many who use it are unaware of how it works. Here we open the DES box and find inside a repetition of sub-boxes in which very simple primitives are at work: substitution, transposition, split, concatenation, and bit-wise operation. DES inside teaches us that complexity is comprised of a lot of simplicity.
Views: 140072 Gideon Samid
New Crypto Key Storage Options in the Google Cloud Platform (Cloud Next '18)
 
50:03
Efficient key management and data-at-rest encryption in GCP is possible today through Cloud KMS. Using Cloud KMS, applications have access to industry compliant symmetric key cryptography to either directly encrypt blocks of data or manage the keys used in other GCP services. But what if you need more? Come to this session to learn about the great new enhancements coming to Cloud KMS and key management in general. SEC210 Event schedule → http://g.co/next18 Watch more Security sessions here → http://bit.ly/2zJTZml Next ‘18 All Sessions playlist → http://bit.ly/Allsessions Subscribe to the Google Cloud channel! → http://bit.ly/NextSub
What is Advance Encryption Standard and how to implement it in C#.net Tutorial
 
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In this tutorial I will show you what is AES (Advance Encryption Standard) and also I will show you how you write AES encryption and decryption algorithm in c#.net. AES is symmetric encryption and it uses 256 bits as a key size for encryption and decryption. For two communicating parties using symmetric encryption for secure communication, the key represents a shared secret between the two.There exist many symmetric encryption algorithms. A few of the well-known ones include AES, DES, Blowfish, and Skipjack. Please like this video and share it with your friends. Also please subscribe to my channel for more cool and awesome programming videos. Have a good day :)
Views: 574 Software Dev
Advanced Encryption Standard
 
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This video is part of the Udacity course "Intro to Information Security". Watch the full course at https://www.udacity.com/course/ud459
Views: 3274 Udacity
MySQL Tutorial 53 - How to Encrypt Data with 2-Way Encryption
 
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HELP ME! http://www.patreon.com/calebcurry Subscribe to my newsletter: http://bit.ly/JoinCCNewsletter Donate!: http://bit.ly/DonateCTVM2. ~~~~~~~~~~~~~~~Additional Links~~~~~~~~~~~~~~~ More content: http://CalebCurry.com Facebook: http://www.facebook.com/CalebTheVideoMaker Google+: https://plus.google.com/+CalebTheVideoMaker2 Twitter: http://twitter.com/calebCurry Amazing Web Hosting - http://bit.ly/ccbluehost (The best web hosting for a cheap price!)
Views: 4192 Caleb Curry
Block Cipher Standards (DES)
 
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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: 29857 nptelhrd
What is Cryptography? | Introduction to Cryptography | Cryptography for Beginners | Edureka
 
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** Cybersecurity Online Training: https://www.edureka.co/cybersecurity-certification-training ** Cryptography is essential to protect the information shared across the internet. This video on What is cryptography explaines you the fundamental concepts along with various encryption techniques. Below are the topics covered in this tutorial: 1. What is Cryptography? 2. Classification of Cryptography 3. How various Cryptographic Algorithm Works? 4. Demo: RSA Cryptography Cybersecurity Training Playlist: https://bit.ly/2NqcTQV Subscribe to our channel to get video updates. Hit the subscribe button above. About Edureka Cyber Security Training Cybersecurity is the combination of processes, practices, and technologies designed to protect networks, computers, programs, data and information from attack, damage or unauthorized access. Edureka’s Cybersecurity Certification Course will help you in learning about the basic concepts of Cybersecurity along with the methodologies that must be practiced ensuring information security of an organization. Starting from the Ground level Security Essentials, this course will lead you through Cryptography, Computer Networks & Security, Application Security, Data & Endpoint Security, idAM (Identity & Access Management), Cloud Security, Cyber-Attacks and various security practices for businesses. ------------------------------------------------ Why Learn Cyber Security? Cybersecurity is the gathering of advances that procedures and practices expected to ensure systems, PCs, projects and information from assault, harm or unapproved get to. In a processing setting, security incorporates both cybersecurity and physical security, it is imperative since cyberattackers can without much of a stretch take and obliterate the profoundly grouped data of governments, defense offices and banks for which the results are huge so it is essential to have an appropriate innovation which an avoid digital wrongdoings. --------------------------------------------------- Objectives of Edureka Cyber Security Course This course is designed to cover a holistic & a wide variety of foundational topics of the cybersecurity domain which will be helpful to lead freshers as well as IT professional having 1 to 2 years of experience, into the next level of choice such as ethical hacking/ audit & compliance / GRC/ Security Architecture and so on This course focuses mainly on the basics concepts of Cyber Security In this course, we are going to deal with Ground level security essentials cryptography, computer networks & security, application security, data & endpoint security, idAM (identity & access management), cloud security, cyber-attacks and various security practices for businesses This course will be your first step towards learning Cyber Security -------------------------------------- Who Should go for this Training? Anyone having the zeal to learn innovative technologies can take up this course. Especially, students and professionals aspiring to make a career in the Cybersecurity technology. However, Cybersecurity Certification Course is best suited for the below mentioned profiles:- Networking Professionals Linux Administrators ----------------------------------------------- Please write back to us at [email protected] or Call us at US: +18336900808 (Toll Free) or India: +918861301699 Facebook: https://www.facebook.com/edurekaIN/ Twitter: https://twitter.com/edurekain LinkedIn: https://www.linkedin.com/company/edureka
Views: 6555 edureka!
Strong vs. Weak Encryption - CompTIA Security+ SY0-401: 6.2
 
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Security+ Training Course Index: http://professormesser.link/sy0401 Professor Messer’s Course Notes: http://professormesser.link/sy0401cn Frequently Asked Questions: http://professormesser.link/faq - - - - - Not all encryption algorithms are alike, and some are much better than others. In this video, you’ll learn how to evaluate encryption strength and how developers can use the bcrypt library to generate secure hashes. - - - - - Download entire video course: http://professormesser.link/401adyt Get the course on MP3 audio: http://professormesser.link/401vdyt Subscribe to get the latest videos: http://professormesser.link/yt Calendar of live events: http://www.professormesser.com/calendar/ FOLLOW PROFESSOR MESSER: Professor Messer official website: http://www.professormesser.com/ Twitter: http://www.professormesser.com/twitter Facebook: http://www.professormesser.com/facebook Instagram: http://www.professormesser.com/instagram Google +: http://www.professormesser.com/googleplus
Views: 19852 Professor Messer
AES Algorithm - Part 1 - Key Expansion
 
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Understand AES algorithm, the easy way using MS Excel. Download "AESKeys.xlsx" from the http://netzts.in/downloads Download "NIST.FIPS.197.pdf" from https://csrc.nist.gov/publications/fips listed under number 197 Watch our 5 part DES Algorithm videos from the links given below: 1. DES Algorithm Part-1 preliminaries of Encryption : https://www.youtube.com/watch?v=JT91GJs1cjA 2. DES Algorithm - Part 2 - The KEYs : https://www.youtube.com/watch?v=mn5y93zxMs0 3. DES Algorithm - Part 3 – Encryption : https://www.youtube.com/watch?v=Lzi6W1XGKeA 4. DES Algorithm - Part 4 – Decryption : https://www.youtube.com/watch?v=Bj47jX1i4-M 5. DES Algorithm - Part 5 - 3DES : https://www.youtube.com/watch?v=CvpuGr5kERQ
XOR Cipher Encryption and Decryption in C++
 
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XOR Cipher in C++ 00:02 - Encryption 02:27 - testing encryption 02:38 - Decryption 04:56 - Decryption Testing xor encryption and decryption using c plus plus programming language xor cipher is a simple cipher, in which each individual letter of message is XOR-ed with key, to get encrypted text. In this video we get cipher text in hexadecimal
Views: 361 VoxelPixel
Encryption and Hashing explanation and differences in 5 minutes
 
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A very basic level and almost non technical explanation of the terms encryption and hashing
Views: 1138 Imran Hossain
What is Encryption and Decryption ? | Concept Explained (in Hindi)
 
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In this video we will discuss about encryption and decryption. How these things works and why we need these. Watch the full video to know more about this topic. Like the video and please share with your friends. Subscribe to my channel for more video like this and to support my effort. Catch me on Social Networking Websites Like my Facebook Page: https://www.facebook.com/technicalsagarindia Twitter: https://twitter.com/iamasagar
Views: 106777 Technical Sagar
Digital Encryption Vlog Part 1, Keep your Content Safe
 
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Hey what's up? I have been thinking about digital security a lot lately, whether it is for your personal computer flash-drive, cloud storage. Or if you are taking your creative content to show your high profile client, what they hired you for. In case you get robbed or you just lose it I have 2 free programs that work cross platform for both Mac and Windows. And they will keep your sensitive information, or client work safe and prevent it, to get into the wrong hands as long as you don't share your password with anyone. Let's face it, most of our sensitive information or at least a copy of it, is going to be on a form of digital media. About What got me thinking about this digital security is what has happened in Texas with Hurricane Harvey, and that got me thinking about what it was like in New Orleans under and a short while after Hurricane Katrina. LaCie Private-Public can be downloaded from here: http://www.lacie.com/products/software/private-public/ The first Encryption program is from Lacie and it's called Private-Public.app. - The first thing you want to do is insert a Flash-drive / memory stick into your computer. - Then you want to format your flash drive to exfat, so you can use it on both Mac and Windows computers. - Then you want to drag and drop the private app file on to your flash drive - Now you want to open the program from your flash drive - From there you want to decide and allocate how much space you want to be encrypted, how big your encryption container will be - ( I recommend leaving a little of the storage space on your flash-drive not encrypted so you can use it as a normal flash drive for non-sensitive info.) Once the 256bit AES encryption and formatting is done you now have a portable flash-drive with the same encryption as the Pentagon uses for their Top-Secret files. Now every time you want to access your sensitive information on your flash-drive, all you need to do is insert the flash-drive into your computer, open the LaCie app/.exe file icon type in your password and you're good to go. Now you can drag and drop, copy and paste and use it like you would use a normal flash drive. Remember to eject the encrypted container first, then your flash-drive before you remove your flash-drive again. I’m Making these Tutorials because when I had a question about this stuff, I could not find anything, so I’m trying to make these the way and how I would have wanted to find Tutorials about it. If that makes any sense. Do you think these tutorials were helpful? Let me know if you have something you want me to do a Tutorial on? Thank you for watching and I hope you enjoyed it. Don’t be afraid, the Subscribe button won’t bite if you press it ;P. If you Liked this Tutorial, Please hit the Subscribe Button Go check My other Accounts out and let me know if you like them. Instagram = https://www.instagram.com/skaugvoll/ Web page = https://spvp.myportfolio.com Twitter = kim_Skaugvoll Background music: Song: Axel - Desert Sounds (Vlog No Copyright Music) Music provided by Vlog No Copyright Music. Video Link: https://youtu.be/V_M56-DXiAw
Views: 106 Kim Skaugvoll
DES Algorithm
 
22:52
It is used for encryption and decryption
Views: 65757 Ravi Lanke
Lab6 RC5 demo
 
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This is the simple demo of Lab 6, RC5 complete.The number for encryption is 1799529900000006 and its encryption result is 480D38B1432146DB, which is also the number for decryption.
Views: 41 Tianhao Song
AACS encryption key controversy
 
14:59
AACS encryption key controversy A controversy surrounding the AACS cryptographic key arose in April 2007 when the Motion Picture Association of America and the Advanced Access Content System Licensing Administrator, LLC (AACS LA) began issuing cease and desist letters to websites publishing a 128-bit (16-byte) number, represented in hexadecimal as 09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0 (commonly referred to as 09 F9), a cryptographic key for HD DVDs and Blu-ray Discs.The letters demanded the immediate removal of the key and any links to it, citing the anti-circumvention provisions of the United States Digital Millennium Copyright Act (DMCA). =======Image-Copyright-Info======= Image is in public domain Author-Info: John Marcotte Image Source: https://en.wikipedia.org/wiki/File:Sample_09-F9_protest_art,_Free_Speech_Flag_by_John_Marcotte.svg =======Image-Copyright-Info======== -Video is targeted to blind users Attribution: Article text available under CC-BY-SA image source in video https://www.youtube.com/watch?v=tlB_cl3gXXE
Views: 522 WikiAudio
1 - Cryptographie symétrique et asymétrique - Comprendre le SSL
 
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Aujourd'hui, on va commencer une sous série de Comprendre comment marche Internet avec "Comprendre le SSL". L'objectif sera de voir diverses notions de cryptographie et de sécurité informatique pour observer comment le SSL (devenue TLS désormais) assurer la sécurité de nos échanges. Vous ne connaissez pas SSL? C'est le protocole de sécurité utilisé quand vous faîtes du HTTPS par exemple. Dans cette vidéo, on va voir deux catégories importantes de la cryptographie, le chiffrage symétrique et asymétrique. Pas de connaissance en particulier à avoir en sécurité, on reste dans du théorie et comme d'habitude sur ma série, de l'accessible.
Views: 42712 Yann Bidon
Delivering e-Commerce Mobile Solutions: Stop Fraud, Not Customers With Internet Retailer
 
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In this webinar, Carmen Honacker, Director of Customer Advocacy at ThreatMetrix, talks about the importance of understanding users’ digital identities across a global data network to deliver enhanced mobile solutions to trusted consumers while stopping cybercriminals. The growth of mobile devices is fundamentally changing the payment and commerce landscape making it critical for businesses to deliver frictionless services with utmost security. The use of mobile devices to browse, share and shop has grown rapidly with commerce growing at 56% year on year. Connected consumers are increasingly using multiple devices to complete transactions; however, mobile apps are seldom designed with adequate fraud detection capabilities and frequently lack the security features necessary for fraud prevention systems to determine if a device in question is being used legitimately – creating a prime opportunities for cybercriminals. As such, organized cybercriminal networks are developing new techniques and technologies to exploit the vulnerabilities in the rapidly expanding mobile channel, resulting in a critical need to detect and prevent mobile based fraud. View this ThreatMetrix webinar to understand the techniques and technologies behind mobile fraud, analyze the business impact of fraud, and learn how to deliver solution to stop mobile cybercrime. Stay up to date on the latest in e-Commerce fraud prevention Follow us on Twitter: http://bit.ly/29ZKimb Like us on Facebook: http://bit.ly/29MuJOJ
Views: 239 ThreatMetrix
LFSR reseeding scheme for achieving test coverage
 
10:47
www.takeoffprojects.com For Details Contact A Vinay :- 9030333433
Views: 79 takeoff edu
PKI - Introduction aux PKI : la cryptographie - Signature numérique
 
02:00
Pour plus de vidéos gratuites : http://bit.ly/1Ac7MdD
Views: 8418 Editions ENI
Legendario nieve
 
00:04
Barney Stinson
Views: 89 mrchildren21

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