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NETWORK SECURITY - BLOCK CIPHER MODES OF OPERATION
 
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1. Electronic Code Book Mode 2. Cipher Block Chaining Mode 3. Output Feedback Mode 4. Cipher Feedback Mode 5. Counter Mode
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: 42492 Zariga Tongy
NETWORK SECURITY - DES (DATA ENCRYPTION STANDARD) ALGORITHM
 
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DES algorithm follows the Feistel Structure Most of the Block cipher algorithms follows Feistel Structure BLOCK SIZE - 64 bits Plain Text No. of Rounds - 16 Rounds Key Size - 64 bits Sub Key Size - 48 bits No. of Sub Keys - 16 Sub Keys Cipher Text - 64 bits
Views: 191331 Sundeep Saradhi Kanthety
RSA Algorithm with solved example using extended euclidean algorithm | CSS series #7
 
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#rsa #deffiehellman #cryptographylectures #lastmomenttuitions Take the Full Course of Cryptography and Network Security What we Provide 1) 20 Videos (Index is given down) + More Update will be Coming Before final exams 2)Hand made Notes with problems for your to practice 3)Strategy to Score Good Marks in Cryptography and Network Scurity To buy the course click https://goo.gl/mpbaK3 if you have any query email us at [email protected] Sample Notes : https://goo.gl/Ze1FpX or Fill the form we will contact you https://goo.gl/forms/2SO5NAhqFnjOiWvi2 Cryptography and System Security Index Lecture 1 Introduction to Cryptography and Security System Lecture 2 Security Goals and Mechanism Lecture 3 Symmetric Cipher Lecture 4 Substitution Cipher Lecture 5 Transposition Cipher Lecture 6 Stream and Block Cipher Lecture 7 Mono Alphabetic Cipher Lecture 8 Poly Alphabetic Cipher Lecture 9 Diffie Hellman Lecture 10 RSA Algorithm with Solved Example Lecture 11 IDEA Algorithm Full Working Lecture 12 SHA-1 Algorithm Full Working Lecture 13 Blowfish Algorithm Full working Lecture 14 DES Algorithm Full Working Lecture 15 Confusion and Diffusion Lecture 16 AES Algorithm Full working Lecture 17 Kerberos Lecture 18 Malicious Software ( Virus and worms ) Lecture 19 DOS and DDOS Attack Lecture 20 Digital Signature Full working Explained More videos Coming Soon.
Views: 323117 Last moment tuitions
Lecture 8: Advanced Encryption Standard (AES) by Christof Paar
 
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For slides, a problem set and more on learning cryptography, visit www.crypto-textbook.com. The AES book chapter for this video is also available at the web site (click Sample Chapter).
Electronic code book|Electronic code block|ECB|ECB cryptography|Electronic codebook (ecb) mode
 
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Electronic code book|Electronic code block|ECB|ECB cryptography|Electronic codebook (ecb) mode
Views: 56 Last Night Study
TY BSc-IT - NS Unit 2 - Lec 1 - Symmetric Key Cryptography,Algo Types, algo modes
 
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The point discussed in this lecture:- Q-1) Explain Symmetric Key Cryptography with diagram. Disadvantages of symmetric key: Q-2) Explain Algorithm Types 2.1. Stream cipher 2.2. Block Cipher Q-3) CONCEPTS OF CONFUSION AND DIFFUSION. Q-4) What is algorithm modes? 4.1. Electronic Code Book (ECB) Mode 4.2. Cipher Block Chaining (CBC) Mode 4.3. Cipher Feedback Mode (CFB) & concept of IV in CFB mode 4.4. Output Feedback (OFB) Mode 4.5. Counter (CTR) Mode Download NS Unit 1 notes from here:- https://drive.google.com/open?id=0B_0qcYrYEFTBTWN2U3V3NGNhbGc All other material by me @ this link:- https://drive.google.com/open?id=0B_0qcYrYEFTBWjVtbS0ydjJ1REU TYBScIT - Sem 5 - Paper Solutions from the year Oct'2012 - April'2017 https://drive.google.com/folderview?id=0B8LpZ5SvGPwrZ2RYckJ2OEpSMk0
Views: 929 Tirup Parmar
Network security-modes of operations
 
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1. Electronic code book 2. cipher block chaining 3.cipher feedback mode 4. output feedback mode 5.counter mode
EnthusiastiCon 2018 – IDEA: Algorithm assembly instructions without words
 
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Computer algorithms are often seen as inherently text-based: People study pseudo-code, look at implementations in real programming languages, or read about algorithms in books or on websites. In my talk “IDEA: Algorithm assembly instructions without words” I will present a highly visual approach of conveying how algorithms work: We use single-page images which have a similar aesthetic like the furniture assembly instructions of a big Swedish company. The diagrams involve arrows, icons, physical objects, intuitive operations, and a lot of cute little people. They are designed to be used in educational contexts, but can also be understood with no prior knowledge. The audience will gain insights in our process of creating the diagrams: I will explain how we prototype, test, and iterate, I will share which lessons we learned and which best practices we discovered. I will also demonstrate one of the resulting diagrams in detail, and empower the audience to create their own assembly instructions. A talk at EnthusiastiCon 2018 by Sebastian Morr / blinry. Intro and closing music: "Open Those Bright Eyes" by Kevin MacLeod (incompetech.com), licensed under CC-BY 3.0 http://creativecommons.org/licenses/by/3.0/
Views: 54 EnthusiastiCon
Building a CPU on an FPGA, part 6
 
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Designing the memory interface module. The Z-Machine specification: http://inform-fiction.org/zmachine/standards/z1point1/index.html Source code for this video: https://github.com/RobertBaruch/plugh-1/tree/1.2 eevblog forum for this project: http://www.eevblog.com/forum/projects/an-fpga-that-you-can-play-zork-on/
Views: 11069 Robert Baruch
Blowfish Encryption with python التشفير بإستعمال بايثون
 
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Views: 149 Aymen tech
Algoritmo de encripcion RC5 MIPANA
 
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vide explicativo del algoritmo de encripcion RC5 REFERENCIAS Salvaguarda y seguridad de los datos (Google Books) https://people.csail.mit.edu/rivest/Rivest-rc5rev.pdf Administración de servicios de internet (Google Books) https://www.ecured.cu/RC5 http://www.openboxer.260mb.com/asignaturas/criptografia/CSimetrica/RC5.php?i=1 https://www.uv.es/sto/cursos/seguridad.java/html/sjava-12.html
Views: 202 Andres Buitrago
Password based Encryption / Decryption on Android with AES Algorithm
 
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Learn to Encrypt and Decrypt data on Android Applications with the Advanced Encryption Standard (AES) Algorithm. Note that this tutorial has been made by Tamil for the SSaurel's Channel. If you want to collaborate on the SSaurel's Channel, don't hesitate to send me your ideas for further details. ► Discover all the Android Apps offered by SSaurel Mobile Apps : https://play.google.com/store/apps/dev?id=6924401024188312025 ► Learn to create Android Apps step by step on the SSaurel's Blog : https://www.ssaurel.com/blog ► Enter in the Bitcoin and cryptocurrency World : https://www.toutsurlebitcoin.fr
Views: 35688 Sylvain Saurel
How I Made 68 DASH = $2933 USD Submitting 6 Dash Budget Proposals Funded By Masternodes Voting Yes!
 
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Will you learn how to submit Dash budget proposals with me today because you might be able to make more Dash than I have made and offer a huge contribution to the Dash cryptocurrency community? Watch this video to see how to use the Dash forums on Dash.org to get feedback on a pre-proposal for free and to get ideas for submitting your own proposal! See how to use dashcentral.org to create and submit your Dash budget proposal for voting by the masternodes at a cost of 5 Dash which you can ask for back in the proposal plus whatever else you would like to earn! Would you leave a comment to help me decide whether I should submit any more proposals for my own projects? More about Dash! Dash was originally released as XCoin (XCO) on January 18, 2014. On February 28, the name was changed to "Darkcoin". On March 25, 2015, Darkcoin was rebranded as "Dash" Dash was formerly known as Darkcoin and XCoin. Dash is an open source peer-to-peer cryptocurrency that offers instant transactions with InstantSend, private transactions using PrivateSend, and token fungibility. Dash operates a decentralized governance and budgeting system, making it the first decentralized autonomous organization. Dash uses a chained hashing algorithm called X11 for the proof-of-work. Instead of using the SHA-256 (from well-known Secure Hash Algorithm family) or scrypt it uses 11 rounds of different hashing functions. Watch more of my videos or those on Dash Detailed with Amanda B. Johnson to continue learning more about Dash! https://www.youtube.com/channel/UCAzD2v9Yx4a4iS2_-unODkA. To track the value of Dash in USD, I use https://coinmarketcap.com/currencies/dash/. SUBSCRIBE? Help me reach 250,000 YouTube subscribers at http://jerry.tips/250kyts. COUPONS! Get free coupons to all of my Skillshare classes at https://jerrybanfield.com/freecourses/. CC! Amazon Prime members watch free with closed captions at http://jerry.tips/amzpm. LISTEN! Audible gold members listen to my audio books with a credit at http://jerry.tips/jbaudible. ABOUT! Enjoy an unforgettable autobiographical experience with me free with Amazon Prime at http://amzn.to/2mR7DJD or on YouTube at https://youtu.be/aPzmDezsRZA or on Skillshare at http://skl.sh/2kTgP1d. PRICING for my SERVICES is at http://jerry.tips/isrvcs. HOW? Learn how I do my live streaming and video recording at http://skl.sh/2j8ZSgR. PODCAST! Listen to a new episode of my podcast free every day at http://jerry.tips/hppdc or on iTunes at http://jerry.tips/itunesj or on Google Music at http://jerry.tips/goopjb. YOUTUBE! Would you like more views and subscribers on your channel? Take my newest YouTube Partner Program secrets class free at https://jerrybanfield.com/freecourses/ or read my YouTube book on Amazon with Kindle at http://jerry.tips/mboks or listen on Audible at http://jerry.tips/audibyt. PARTNERS! How would you feel with access to my MASTERMIND named "Masters of Online Business Administration," private label rights (PLR) to my 3,000+ videos, COLLABORATION with me on new tutorials, and word of mouth marketing? Find out as a member of my partners program at http://jerry.tips/prtnsjb. FACEBOOK! Would you prefer to watch on Facebook? Like my page and select "see first" to view my new posts in your newsfeed at http://facebook.com/jbanfield. TWITTER! Would you follow me with @jerrybanfield at https://twitter.com/jerrybanfield. BLOG! Read 300+ posts on my blog at http://jerry.tips/blgpsts. RESOURCES! View my list of everything I use in my business at http://jerry.tips/rsourcs. READ books with me on Amazon by viewing my author profile at http://jerry.tips/readwme. SHOP for the merchandise I wear and design including the shirts I show in my videos http://jerry.tips/rbshp. THANKS! I appreciate you reading this and hope you have a wonderful day! Sincerely, Jerry Banfield https://jerrybanfield.com/freecourses/
Views: 2358 Jerry Banfield
Key size
 
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In cryptography, key size or key length is the size measured in bits of the key used in a cryptographic algorithm. An algorithm's key length is distinct from its cryptographic security, which is a logarithmic measure of the fastest known computational attack on the algorithm, also measured in bits. The security of an algorithm cannot exceed its key length, but it can be smaller. For example, Triple DES has a key size of 168 bits but provides at most 112 bits of security, since an attack of complexity 2112 is known. This property of Triple DES is not a weakness provided 112 bits of security is sufficient for an application. Most symmetric-key algorithms in common use are designed to have security equal to their key length. No asymmetric-key algorithms with this property are known; elliptic curve cryptography comes the closest with an effective security of roughly half its key length. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video
Views: 1477 Audiopedia
Linear Cryptanalysis
 
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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: 18399 nptelhrd
What Is Public Key Cryptography (PKC) Full Explain In Hindi For O level Exam
 
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What Is Public Key Cryptography? What is encryption encryption-kya-hota-hai ╔╦╦╦═╦╗╔═╦═╦══╦═╗☆ ║║║║╩╣╚╣═╣║║║║║╩╣TO My Channel ╚══╩═╩═╩═╩═╩╩╩╩═╝☆ Subscribe my channel like videos comment below any query to Subscribe Us & Comment:- https://goo.gl/FJ1nWJ Follow On social site © original channel ██║▌│║║█║█║▌║║█║▌│ █ __/LINKS\_ ► Facebook:➜ http://facebook.com/techvideoguru ► Twitter:➜ https://mobile.twitter.com/techvideoguru ► Google+:➜ https://plus.google.com/u/0/107344256878607670469 ► Website:➜ http://techvideoguru.mobi ►Youtube:-https://www.youtube.com/techvideoguru ►Blog:-http://techvideoguru.blogspot.in ►Instagram:-https://www.instagram.com/techvideoguru/ ►Pinterest:- https://www.pinterest.com/techvideoguru/ ►Dailymotion:-http://www.dailymotion.com/techvideoguru ►LinkedIn:-https://in.linkedin.com/in/vikas-kumar-maurya-27262b78 ================================================ ╔══════════════════════╗ __|Watch More Videos|_ https://goo.gl/FJ1nWJ ╚══════════════════════╝
Views: 69669 TechVideo Guru
Implementación de Algoritmos Cifrados en GPU y en FPGA
 
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Se muestra la implementación de algoritmos livianos de Cifrado a nivel de hardware como en la GPU y en FPGA
keamanan komputer RC6
 
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tugas akhir implementasi di raspberry RC6
Views: 46 isya alfian
Deconstructing The Xbox Security System
 
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Google Tech Talks December 1, 2006 ABSTRACT In late 2001, Microsoft released the Xbox, their first gaming console, to compete against Sony and Nintendo in the living room. As the real money is made with the games and not the consoles, Microsoft had to make sure (as much as they could) that nobody could play pirated games or use the machine for anything other than games. Although the original security design idea was a good one and has been copied a lot since then, Microsoft's inexperienced team made a variety of design, implementation, and policy mistakes. This talk first (re)constructs the design of the Xbox security system from Microsoft's point of view, and then deconstructs it from the...
Views: 4646 Google
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: 1144 Audiopedia