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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: 417984 itfreetraining
DES Algorithm
 
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Explanation of DES Algorithm
Views: 92561 Andrea Sánchez
Cryptography Lesson #1 - Block Ciphers
 
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This tutorial video will help provide an understanding of what block ciphers are, and how they are used in the field of cryptography.
Views: 112749 Ryan Kral
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: 159838 CrashCourse
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: 29088 nptelhrd
How to Break Cryptography | Infinite Series
 
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Only 4 steps stand between you and the secrets hidden behind RSA cryptography. Find out how to crack the world’s most commonly used form of encryption. Tweet at us! @pbsinfinite Facebook: facebook.com/pbsinfinite series Email us! pbsinfiniteseries [at] gmail [dot] com Previous Episode: Can We Combine pi & e into a Rational Number? https://www.youtube.com/watch?v=bG7cCXqcJag&t=25s Links to other resources: Shor's paper: https://arxiv.org/abs/quant-ph/9508027v2 Lecture on Shor's Algorithm: https://arxiv.org/pdf/quant-ph/0010034.pdf Blog on Shor's algorithm: http://www.scottaaronson.com/blog/?p=208 Video on RSA cryptography: https://www.youtube.com/watch?v=wXB-V_Keiu8 Another video on RSA cryptography: https://www.youtube.com/watch?v=4zahvcJ9glg Euler's Big Idea: https://en.wikipedia.org/wiki/Euler%27s_theorem (I can find a non-wiki article, but I don't actually use this in the video. It's just where to learn more about the relevant math Euler did.) Written and Hosted by Kelsey Houston-Edwards Produced by Rusty Ward Graphics by Ray Lux Made by Kornhaber Brown (www.kornhaberbrown.com) Challenge Winner - Reddles37 https://www.youtube.com/watch?v=bG7cCXqcJag&lc=z135cnmgxlbwch1ds233sbzgaojkivaz004 Comments answered by Kelsey: Joel David Hamkins https://www.youtube.com/watch?v=bG7cCXqcJag&lc=z13zdpcwyk2ofhugh04cdh4agsr2whmbsmk0k PCreeper394 https://www.youtube.com/watch?v=bG7cCXqcJag&lc=z135w324kw21j1qi104cdzvrpoixslmq1jw
Views: 170610 PBS Infinite Series
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: 29996 Professor Messer
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: 37559 Zariga Tongy
rc4 Solved Numerical
 
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rc4 security algorithm cryptography..(Stream Cipher).. Facebook Link-https://www.facebook.com/guidetubetuts/
Views: 5038 Guide-Tube
HangoutSquad #1 : DRM vs CAS et Encrypted Media extention / Common Encryption
 
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Le 2è Hangoutsquad vous parlera (encore) de DRM, non seulement parce que la carte blanche OVFSQUAD au Satis 2013 n'a pas été filmé, mais aussi parce qu'il reste encore beaucoup de choses à dire et à éclaircir, le 27 février à 17h (heure française !), interviendront David Bouteruche de Nagra, qui parlera DRM vs CAS et Romain Bouqueau, de Gpac, nous parlera des solutions de chiffrement de demain avec l'Extended Media Extension et la Common Encryption, Si vous avez d'ors et déjà des questions, n'hésitez pas à le poser dans ce fil de discussion, ou en privé, Cette session sera bien évidemment accessibles via Google Hangout, et disponible sur le compte Youtube de la Squad après sa diffusion, Help us caption & translate this video! http://amara.org/v/Et5N/
Views: Justin Dwah
Module 5: Encryption and Decryption with OpenSSL
 
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This video details how to encrypt and decrypt using OpenSSL. References: Farid's Blog. (n.d.). Retrieved March 1, 2015, from http://farid.hajji.name/blog/2009/07/15/encryption-and-decryption-with-openssl/
Views: 4664 Simple Security
How To Encrypt And Decrypt Files Using OpenSSL On Ubuntu Linux
 
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How To Encrypt And Decrypt Files Using OpenSSL On Ubuntu Linux OpenSSL is a program and library that supports many different cryptographic operations, including: Symmetric key encryption Public/private key pair generation Public key encryption Hash functions Certificate creation Digital signatures Random number generation The most common cryptographic operation is encryption. Lets encrypt some files using selected symmetric key (conventional) ciphers such as DES, 3DES and AES.
Views: 216 Amine Nina
Affine Cipher Encryption
 
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gcd: https://www.youtube.com/watch?feature=player_detailpage&v=WA4nP-iPYKE Decryption: http://youtu.be/XFxFPBKFVe8
Views: 19032 Theoretically
Types of Ciphers
 
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Types of Ciphers
Views: 28254 Jungwoo Ryoo
Cryptography 101 - Substitution Ciphers
 
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In this video we look at substitution ciphers: how they are made and how to break them.
Views: 54121 Pico Cetef
RSA Algorithm Example |Cryptography
 
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RSA Algorithm Example |Cryptography
Views: 7424 Last Night Study
RSA Algorithm With Example
 
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Views: 86817 B Hariharan
The one-time pad | Journey into cryptography | Computer Science | Khan Academy
 
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The perfect cipher Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/frequency-stability?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/polyalphabetic-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: 411692 Khan Academy
What is GCM? Galois Counter Mode (of operation) (usually seen as AES-GCM)
 
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In this video I'm explaining what is that Galois Counter Mode that provides Authenticated Encryption with Associated Data (AEAD). You must have heard it combined with AES, and maybe used in TLS, ... This is just a small explanation, you can get more on the NIST specs. Errata (thanks to Casper Kejlberg-Rasmussen in the comments) error at 11:21, the last M_H that is applied before going into the TAG should not be there if you compare your drawing to the diagram on https://en.wikipedia.org/wiki/Galois/Counter_Mode. Be sure to follow me on twitter :) https://twitter.com/lyon01_david and to subscribe to my blog! http://www.cryptologie.net Cheers!
Views: 15711 David Wong
RSA Algorithm
 
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Video states the RSA Encryption and Decryption
Views: 32606 apurva59
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: 13639 Audiopedia
Hill Cipher || With 3x3 Matrix Multiplicative Inverse Example in Mod 26
 
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Hill Cipher || With 3x3 Matrix Multiplicative Inverse Example in Mod 26 This is My First Video Lecture, (*Sorry for Audio Quality & Little Disturbance) Note: Watch this video in 1.5x if you feel it's slow.
Views: 36664 Pritesh Prajapati
RSA Algorithm
 
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CONNECT with me through following links SUBSCRIBE NOW https://www.youtube.com/c/SRCOMPUTEREDUCATION Facebook https://www.facebook.com/SR-Computer-Education-859020000933768/ Instagram https://www.instagram.com/shyju.raju/ Hello everyone , In this video I am going to discuss about RSA Algorithm in simple way so that you can remember and write RSA Algorithm easily in your examination . I am sure after watching this video of RSA Algorithm you will get clear idea about the basis for solving examples of RSA Algorithm. RSA Algorithm is most widely accepted and used algorithm. RSA Algorithm is Public key encryption algorithm. Rivest Shamir and Adelman published this RSA Algorithm. There are seven steps involved in RSA Algorithm. I am sure you will be able to remember this seven steps of RSA Algorithm after watching my video. I am soon going to upload another video in which I will solve one example of RSA Algorithm, but before watching that video I strongly recommend you to watch this video of RSA Algorithm I want to reach maximum number of students in this world and help each student to score well in their exam by watching my FREE videos on COMPUTER ENGINEERING related subjects, YOU can help me to achieve my GOAL by sharing this channel with your classmates, family members , friends and everyone you know so that they can also get help from my YouTube channel as you are getting. Thanks for watching my video.
RSA encryption: Step 4 | Journey into cryptography | Computer Science | Khan Academy
 
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RSA worked example Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/modern-crypt/v/checkpoint-advanced-lessons?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/modern-crypt/v/euler-s-totient-function-phi-function?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: 94062 Khan Academy Labs
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: 425846 Khan Academy
GTU INS Unit 2A Data Encryption Standard DES
 
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In this video , i discussed about GTU INS UNIT 2 first part Data Encryption Standard DES you Can find Unit PPT , related Videos and syllabus on Below Google Drive LInk https://drive.google.com/drive/folders/0B3F0L2_uTazMbDlrU0xLci1GVjg?usp=sharing For any Query you can mail me on [email protected]
Views: 760 ANKIT CHOUHAN
Advanced Encryption Standard (AES): Sub Stages; Finite Field Arithmetic
 
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AES Steps: Substitute Bytes, Shift Rows, Mix Columns, GF Arithmetic
Views: 9199 Natarajan Meghanathan
RSA algorithm example | RSA algorithm example step by step | RSA hindi | diffie hellman example
 
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In this video it is easily explained how to find mode And formulaes of rsa As well as diffie-hellman Click here to subscribe well Academy https://www.youtube.com/wellacademy1 Facebook Me : https://goo.gl/2zQDpD Thank you for watching share with your friends Follow on : Facebook page : https://www.facebook.com/wellacademy/ Instagram page : https://instagram.com/well_academy Twitter : https://twitter.com/well_academy Google+ :https://plus.google.com/+WellAcademy1 rsa algorithm rsa algorithm in network security rsa algorithm with example rsa algorithm explained rsa algorithm example with solution rsa algorithm explanation rsa algorithm example step by step rsa algorithm hindi, rsa algorithm example, rsa algorithm explanation, diffie hellman key exchange algorithm in cryptography, diffie hellman key exchange algorithm in english, diffie hellman problem, diffie hellman key exchange algorithm with example, diffie hellman example, diffie hellman problem example, diffie hellman, diffie hellman algorithm rsa algorithm example with solution, rsa algorithm example step by step, rsa algorithm hindi, rsa algorithm explained, rsa algorithm problems, rsa algorithm in hindi
Views: 58579 Well Academy
NETWORK SECURITY - DIFFIE HELLMAN KEY EXCHANGE ALGORITHM
 
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This Algorithm is used to exchange the secret /symmetric key between sender and receiver. This exchange of key can be done with the help of public key and private key step 1 Assume prime number p step 2 Select a such that a is primitive root of p and a less than p step 3 Assume XA private key of user A step 4 Calculate YA public key of user A with the help of formula step 5 Assume XB private key of user B step 6 Calculate YB public key of user B with the help of formula step 7 Generate K secret Key using YB and XA with the help of formula at Sender side. step 8 Generate K secret Key using YA and XB with the help of formula at Receiver side.
Java Advanced Programming Tutorial 20 Encryption
 
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How to create an encryption program in java
Views: 21847 CompSci Studio
How to encrypt and decrypt passwords using Cipher Algorithm and how it works? BDSide
 
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a cipher (or cypher) is an algorithm for performing encryption or decryption—a series of well-defined steps that can be followed as a procedure. An alternative, less common term is encipherment. To encipher or encode is to convert information into cipher or code. In common parlance, "cipher" is synonymous with "code", as they are both a set of steps that encrypt a message; however, the concepts are distinct in cryptography, especially classical cryptography. To get the full source code: http://www.bdside.com/tutorials/how-to-encrypt-and-decrypt-passwords-in-android.html
Views: 26 BDSide
CISSP Training - Cryptography
 
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PalaestraTraining.com This video on Cryptography (Part 1 of 3) is part of our CISSP certification Training Series. (ISC)2 CISSP certification is one of the top security certifications you can achieve, and our expert instructor walks you step by step trough all 10 domains in the CISSP Common Body of Knowledge (CBK). Visit us at PalaestraTraining.com for full details about this amazing series.
Views: 199539 The Geek Academy
The Caesar cipher | Journey into cryptography | Computer Science | Khan Academy
 
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Brit explains the Caesar cipher, the first popular substitution cipher, and shows how it was broken with "frequency analysis" Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/polyalphabetic-cipher?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/intro-to-cryptography?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: 582462 Khan Academy
Encryption Algorithms-Symmetric,DES,3DES,RC4
 
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symmetric encryption algorithm, DES, 3DES, etc
Views: 112 all about to code
Applied Cryptography: DES in Java - Part 2
 
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Previous video: https://youtu.be/MZhCpMtwHrM Next video: https://youtu.be/Eokz2arVLDI
Views: 812 Leandro Junes
Algorithm Ashish DES
 
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Views: 756 ashish k
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: 1845 WikiAudio
Breaking AES with ChipWhisperer - Piece of scake (Side Channel Analysis 100)
 
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Terrible DPA explanation and sharing my experience solving the side channel analysis challenge "piece of scake" from the rhme2 CTF. A real DPA tutorial by Colin O'Flynn: https://www.youtube.com/watch?v=OlX-p4AGhWs The ChipWhisperer AES tutorial: http://www.newae.com/sidechannel/cwdocs/tutorial.html ChipWhsiperer: http://newae.com/tools/chipwhisperer/ The DPA paper: https://www.rambus.com/introduction-to-differential-power-analysis-and-related-attacks/ rhme2 challenge files: https://github.com/Riscure/Rhme-2016 -------------------------------------- Twitter: https://twitter.com/LiveOverflow Website: http://liveoverflow.com/ Subreddit: https://www.reddit.com/r/LiveOverflow/
Views: 24478 LiveOverflow
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: 883 Udacity
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: 31 The Audiopedia
Introduction to Private (Symmetric) Key Encryption
 
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Our site: http://teamrio.blogspot.com/ In this video, Josh and Derek introduce the basic concepts behind private key encryption (more commonly known as symmetric key encryption to reduce confusion with components of the private key encryption method).
Views: 10705 Derek May-West
cryptography and network security
 
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Overview of Symmetric Cipher Model
Views: 961 Devi Priya
What is cryptography? | Journey into cryptography | Computer Science | Khan Academy
 
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What is Cryptography? A story which takes us from Caesar to Claude Shannon. Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/caesar-cipher?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/algorithms/intro-to-algorithms/v/what-are-algorithms?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: 779404 Khan Academy
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: 166 Brandon Krieger
Enhanced String encryption with PBE, DES and MD5 - Java Intermediate Tutorial #18
 
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This is a neat little method I found and will serve quite well for most purposes. Find all my tutorials at: http://indev0r.tk Follow me on Twitter: @Indev0r Check out my blog: http://indev0r.tumblr.com
Views: 4986 MrDeathJockey
Euclidean algorithm : How to find Greatest Common Divisor using Euclidean Algorithm
 
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Euclidean algorithm : How to find Greatest Common Divisor using Euclidean Algorithm | GCD Visit Our Channel :- https://www.youtube.com/channel/UCxikHwpro-DB02ix-NovvtQ In this lecture we have taught about what how to find Greatest Common Divisor (GCD) using Euclidean algorithm. Follow Smit Kadvani on :- Facebook :- https://www.facebook.com/smit.kadvani Instagram :- https://www.instagram.com/the_smit0507 Follow Dhruvan Tanna on :- Facebook :- https://www.facebook.com/dhruvan.tanna1 Instagram :- https://www.instagram.com/dhru1_tanna Follow Keyur Thakkar on :- Facebook :- https://www.facebook.com/keyur.thakka... Instagram :- https://www.instagram.com/keyur_1982 Snapchat :- keyur1610 Follow Ankit Soni on:- Facebook :- https://www.facebook.com/ankitsoni.1511 Instagram :- https://www.instagram.com/ankit_soni1511
Views: 6070 Quick Trixx
How to encrypt files, documents, emails. Asymmetric (PGP), Symmetric, Generate keys
 
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Quick tutorial explaining how to encrypt data using Act On File, how to send encrypted emails without sharing a common password - what???, and how to generate public/private keys. http://www.mbbsoftware.com/Products/Act-On-File/2012/Default.aspx http://www.mbbsoftware.com/Products/Act-On-File/2012/Download.aspx http://www.mbbsoftware.com/Products/Act-On-File/2012/Modules/Cryptor.aspx The Cryptor module is used to encrypt and decrypt files and data. When information is encrypted it cannot be read until it is decrypted. Encryption must be used whenever one stores or moves any kind of private data on a local machine, removable media (flash drive, CD, DVD, etc), or it is transmitted over the internet. For example, an email message is just like an open postcard which everyone in the message path can read. The difference is that an email and the data attached to it can be also easily monitored and copied by numerous computers on the internet. Similarly, when travelling and carrying private information on a removable media (e.g. a flash drive), it is important that the information is encrypted so that if the drive is lost or stolen then the data is not intelligible to the person who finds it. Important private data should be kept encrypted even when held on a desktop system to protect it from the possible threats of burglary and some types of spying software which may infect a computer. Encryption can sometimes be cumbersome as encrypted data needs to be decrypted before use, and then re-encrypted if it was modified. However using Act On File to encrypt and decrypt data is simple and straightforward, yet it is very cryptographically powerful. Act On File supports the modern cryptographic algorithms. Using asymmetric encryption gives strongest protection and allows exchange of encrypted data using private passwords, i.e. without requiring a common password. The maximum size of the key supported by Act On File is 16384 bit (or 2048 byte), currently 2048 bit (512 byte) key is considered strong. In difference symmetric encryption uses a single password for both encryption and decryption. Act On File supports the strongest known symmetric algorithm - AES, as well as number of other strong symmetric encryption algorithms. A step-by-step technique on how to exchange information online safely is described in the Exact Steps to Exchange Emails Safely protocol here: http://www.mbbsoftware.com/Learning/Safe-Online-Communication.aspx.
Views: 5193 MBBSoftware
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: 2647 edureka!