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Cryptography and security systems Series
introduction to CSS: https://goo.gl/tjrh1L
security goals and mechanism:https://goo.gl/uq35hP
symmetric cipher:https://goo.gl/KFxF9j
Substitution cipher and its types:https://goo.gl/MKmPzk
Transposition cipher:https://goo.gl/uHqD7i
diffie -hellman: https://goo.gl/YrskC5
RSA Algorithm:https://goo.gl/KwzCBF
Kerberos:https://goo.gl/MQPgzw
IDEA algorithm : https://goo.gl/PTCqFH
Dos and DDos attack: https://goo.gl/8T345G
SQL injection:https://goo.gl/bcVHnw
SHA-1 vs MD5 :https://goo.gl/QJBhJD
chalo toh public bus pass hojao aur share karo videos ko whatsapp group
apne last moment pe unn dosto ko jo apni tarah last moment pe padhte hai
Aur videos CSS ke aane waale hai so Channel ko subscribe jaroor karna
follow us on:
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Views: 71323
Last moment tuitions

Learn more advanced front-end and full-stack development at: https://www.fullstackacademy.com
SHA-1 stands for Secure Hash Algorithm 1, a cryptographic hash function developed by the NSA that can be used to verify that a file has been unaltered. In this video, we go over the basic features and common implementations of cryptographic hash functions before diving into the inner workings of a Javascript implementation of the SHA-1 function. Although out of use now, walking through the hash function code provides valuable insight into how these algorithms work.
Watch this video to learn:
- What are Cryptographic Hash Functions
- Practical uses for Cryptographic Hash Functions
- How does SHA-1 work

Views: 11924
Fullstack Academy

This video is part of the Udacity course "Intro to Information Security". Watch the full course at https://www.udacity.com/course/ud459

Views: 27646
Udacity

The MD5 algorithm is a widely used hash function producing a 128-bit hash value.
Step 1. Append Padding Bits. The message is "padded" (extended) so that its length (in bits) is congruent to 448, modulo 512. ...
Step 2. Append Length. ...
Step 3. Initialize MD Buffer
Step 4. Process Message in 16-Word Blocks. ...
Step 5. Output.

Views: 35267
Sundeep Saradhi Kanthety

In this video, I answer a question from one of the viewers of my YouTube channel YouTube.com/GeorgeLevy :
What is a SHA-256 Cryptographic Hash Algorithm?
Learn more about blockchain, and Bitcoin on my online video course Blockchain and Bitcoin Fundamentals at:
http://BlockchainandBitcoinFundamentals.com
Sign up to receive George Levy's FREE email newsletter and a video email course on blockchain, Bitcoin and cryptocurrency ($47 Value yours free) at:
https://GeorgeLevy.com/Free
Subscribe to this channel to stay up to date on new educational videos published each Thursday!
Follow George Levy at the following links:
https://GeorgeLevy.com (George Levy Website)
https://Twitter.com/GeorgeLevy
https://Facebook.com/GeorgeLevyBlockchain (Official Facebook Page)
Special offer for George Levy channel viewers, open a new Bitcoin wallet for Free and get $10 bonus in Bitcoin at:
https://blockchaininformer.com/btcwallet

Views: 10663
George Levy

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/donateinfi
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: 188941
PBS Infinite Series

For clearer illustrations, a .ppsx file (ppt slide show with narration) can be accessed at https://www.dropbox.com/s/j7k4c5nm3zgezp2/ppsxABU_SHA2_Presentation.ppsx

Views: 15937
Patricia Angela Abu

Since Keccak has been selected as the winner of the SHA-3 competition in 2012, a myriad of different hash functions have been trending. From BLAKE2 to KangarooTwelve we'll cover what hash functions are out there, what is being used, and what you should use. Extending hash functions, we’ll also discover STROBE, a symmetric protocol framework derived from SHA-3
Slides can be found here: https://www.owasp.org/images/f/f5/OWASPLondon20171123_SHA3_vs_the_world.pdf
Speaker Bio: David Wong (@lyon01_david)
David Wong is a Security Consultant at the Cryptography Services practice of NCC Group. He has been part of several publicly funded open source audits such as OpenSSL and Let's Encrypt. He has conducted research in many domains in cryptography, publishing whitepapers and sharing results at various conferences including DEF CON and ToorCon as well as giving a recurrent cryptography course at Black Hat. He has contributed to standards like TLS 1.3 and the Noise Protocol Framework. He has found vulnerabilities in many systems including CVE-2016-3959 in the Go programming language and a bug in SHA-3's derived KangarooTwelve reference implementation. Prior to NCC Group, David graduated from the University of Bordeaux with a Masters in Cryptography, and prior to this from the University of Lyon and McMaster University with a Bachelor in Mathematics.
This talk was presented at OWASP London Chapter Meeting (meetup) on 23-Nov-2017 hosted by The Telegraph. Follow OWASP London on Twitter: @owasplondon

Views: 481
OWASP London

Looking at the recent SHA-1 collision discovered by Google researchers where two different PDF share the same hash value.
https://shattered.it

Views: 3541
quidsup

https://8gwifi.org/MessageDigest.jsp
Secure Hash Standard Secure Hash Algorithm tutorial
Algorithm can be described in two stages: preprocessing and hash computation. Preprocessing involves padding a message, parsing the padded message into m-bit blocks, and setting initialization values to be used in the hash computation. The hash computation generates a message schedule from the padded message and uses that schedule, along with functions, constants, and word operations to iteratively generate a series of hash values. The final hash value generated by the hash computation is used to determine the message digest.
sha-1 algorithm
sha-1 algorithm example
sha-1 algorithm steps
sha1 algorithm explanation with example
sha1 hash
sha1 hash algorithm
sha1 tutorial

Views: 5181
Zariga Tongy

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: 479348
itfreetraining

This video cover hash functions in Java (MD2, MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512).
Please upvote & subscribe and visit https://www.facebook.com/tuts4java on facebook. Like & share :)

Views: 11491
Zoran Davidović

The Secure Hash Algorithm is a family of cryptographic hash functions published by the National Institute of Standards and Technology (NIST) as a U.S. Federal Information Processing Standard (FIPS), including:
SHA-0: A retronym applied to the original version of the 160-bit hash function published in 1993 under the name "SHA". It was withdrawn shortly after publication due to an undisclosed "significant flaw" and replaced by the slightly revised version SHA-1.
This video is targeted to blind users.
Attribution:
Article text available under CC-BY-SA
Creative Commons image source in video

Views: 8209
Audiopedia

In this video I quickly demonstrate what the well publicised collision attack on the SHA1 algorithm is all about and how to try it yourself.
https://shattered.io
You can download the files from the link below.
http://thehackernews.com/2017/02/sha1-collision-attack.html
Command to check the files: (in macOS terminal)
shasum shattered-1.pdf
shasum shattered-2.pdf

Views: 1915
Matt Thomas

This video is part of the Udacity course "Intro to Information Security". Watch the full course at https://www.udacity.com/course/ud459

Views: 56391
Udacity

AES algorithm is the Block Cipher Symmetric Algorithm
Block Size is 128 bits
Key Size is 128 bits ( 4 words or 16 Bytes )
Sub Key Size is 1 Word (32 bit)
Number of Sub keys 44 Words
Number of Rounds 10
Cipher Text Size is 128 bits

Views: 94442
Sundeep Saradhi Kanthety

PDF with additional security videos:
https://ibm.ent.box.com/s/ich0yyiw54y0ek6s9a66xvtjku8e42rc

Views: 271
Jose Bravo

Details here:
http://asecuritysite.com/crypto/day3
and lab:
https://dl.dropboxusercontent.com/u/40355863/lab03.pdf

Views: 1556
Bill Buchanan OBE

This video builds on the first two and unites the concepts of public/private key encryption and cryptographic hash functions to explain digital signatures - a key concept that underpins the security model web transactions and bitcoin among many other things

Views: 10864
Matt Thomas

How to Encrypt and Decrypt a String in C#. The C# Basics beginner course is a free C# Tutorial Series that helps beginning programmers learn the basics of the C# Programming Language. This is the best way to Learn C# for beginners
Encrypt your passwords with MD5 hashing in C#
C# Salting & Hashing Passwords
C# encrypting and decrypting using AES CBC, safe storing the encrypted data
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: 36761
Fox Learn

Researchers from Google, the Cryptology Group at Centrum Wiskunde and Informatica in Amsterdam, published a paper last week about the first practical collision attack for the cryptographic hash function SHA-1. The attack method entails the collision of two PDF files by obtaining the SHA-1 signature on the first PDF and mimicking the signature to exploit the second PDF. The attack utilized Google’s cloud infrastructure and used nine quintillion SHA-1 computations in total, making it among the largest computations ever completed. The first phase of the attack was carried out over 8 separate locations, and the second on a single cluster of GPUs hosted by Google.
SHA-1 is a 22 year old function and has had theoretical attacks conceptualized since 2005. This attack, carried out by these researchers, took 2 years to execute.
https://shattered.it/static/shattered.pdf
https://threatpost.com/first-practical-sha-1-collision-attack-arrives/123868/
Check us out:
https://www.cybertraining365.com/cybe...
Blog: http://blog.cybertraining365.com/
Twitter: @CyberTrain365

Views: 166
CyberTraining 365

Security+ Training Course Index: http://professormesser.link/sy0501
Professor Messer’s Course Notes: http://professormesser.link/501cn
Frequently Asked Questions: http://professormesser.link/faq
- - - - -
There are many methods and implementations of cryptographic hashing. In this video, you’ll learn about some of the most popular hashing algorithms.
- - - - -
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: 13557
Professor Messer

Substitution Techniques
Here the Plain Text Letters are replaced with Cipher Text Characters
1) Caesar Cipher
2) Play Fair Cipher

Views: 54722
Sundeep Saradhi Kanthety

In this video I explain the fundamental concepts of cryptography. Encryption, decryption, plaintext, cipher text, and keys.
Learn Math Tutorials Bookstore http://amzn.to/1HdY8vm
Donate - http://bit.ly/19AHMvX
STILL NEED MORE HELP?
Connect one-on-one with a Math Tutor. Click the link below:
https://trk.justanswer.com/aff_c?offer_id=2&aff_id=8012&url_id=232
:)

Views: 99127
Learn Math Tutorials

A digital signature is equivalent to a handwritten signature in paper, and a digital signature serves three basic purposes. Digital signature is commonly used for software distribution, financial transactions and other cases where it is important to detect forgery. Digital signatures are very popular with e-mail users.
In this video, I will talk about the digital, uses, and the whole process of creating and sending digitally signed document over the Internet.
Keep in mind, digital signature is not about encrypting document, just like paper-based signature.
Playlist: Basic Cryptography
https://www.youtube.com/watch?v=vk3py9M2IfE&list=PLSNNzog5eyduN6o4e6AKFHekbH5-37BdV
Advanced Cryptography:
https://www.youtube.com/watch?v=TmA2QWSLSPg&list=PLSNNzog5eydtwsdT__t5WtRgvpfMzpTc7
Please subscribe to my channel!
Please leave comments or questions!
Many thanks,
Sunny Classroom

Views: 120472
Sunny Classroom

Differences Between Encryption, Encoding and Hashing

Views: 6893
LearnEveryone

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: 7692
nptelhrd

In this video I show you how to encrypt and decrypt strings and files using Python. I show you how to create a key, store the key and then how to use the key to encrypt and decrypt strings and files. This video demonstrates the use of the cryptography module.
🌎 Post with code and a written tutorial: https://nitratine.net/blog/post/encryption-and-decryption-in-python/
📺 Auto Py to Exe: https://youtu.be/OZSZHmWSOeM
📺 Python GUI Using Chrome: https://youtu.be/2kbeBzEQfXE
📺 How to Send Emails in Python: https://youtu.be/YPiHBtddefI
The cryptography is supported by Python 2.7 and Python 3.4 and above. (Also PyPy 5.3+)
🌎 cryptography docs: https://cryptography.io/en/latest/
🐍 In this video I use Python 3.6.
👍🏼 Feel free to comment with any issues.

Views: 11452
PyTutorials

How do you secure messages over the internet? How do quantum computers break it? How do you fix it? Why don't you watch the video to find out? Why does this description have so many questions? Why are you still reading? What is the meaning of life?
Facebook: https://www.facebook.com/frameofessence
Twitter: https://twitter.com/frameofessence
YouTube: https://www.youtube.com/user/frameofessence
CLARIFICATIONS:
You don't actually need a quantum computer to do quantum-safe encryption. As briefly mentioned at 7:04 , there are encryption schemes that can be run on regular computers that can't be broken by quantum computers.
CORRECTIONS:
[2:18] Technically, you can use any key to encrypt or decrypt whatever you want. But there's a specific way to use them that's useful, which is what's shown in the video.
[5:36] In RSA, depending on exactly what you mean by "private key", neither key is actually derivable from the other. When they are created, they are generated together from a common base (not just the public key from the private key). But typically, the file that stores the "private key" actually contains a bit more information than just the private key. For example, in PKCS #1 RSA private key format ( https://tools.ietf.org/html/rfc3447#appendix-A.1.2 ), the file technically contains the entire public key too. So in short, you technically can't get the public key from the private key or vice versa, but the file that contains the private key can hold more than just the private key alone, making it possible to retrieve the public key from it.
Video links:
Encryption and HUGE numbers - Numberphile
https://youtu.be/M7kEpw1tn50
The No Cloning Theorem - minutephysics
https://youtu.be/owPC60Ue0BE
Quantum Entanglement & Spooky Action at a Distance - Veritasium
https://youtu.be/ZuvK-od647c
Sources:
Quantum Computing for Computer Scientists
http://books.google.ca/books/about/Quantum_Computing_for_Computer_Scientist.html?id=eTT0FsHA5DAC
Random person talking about Quantum MITM attacks
http://crypto.stackexchange.com/questions/2719/is-quantum-key-distribution-safe-against-mitm-attacks-too
The Ekert Protocol (i.e. E91)
http://www.ux1.eiu.edu/~nilic/Nina's-article.pdf
Annealing vs. Universal Quantum Computers
https://medium.com/quantum-bits/what-s-the-difference-between-quantum-annealing-and-universal-gate-quantum-computers-c5e5099175a1
Images, Documents, and Screenshots:
Post-Quantum Cryptography initiatives
http://csrc.nist.gov/groups/ST/post-quantum-crypto/cfp-announce-dec2016.html
http://pqcrypto.eu.org/docs/initial-recommendations.pdf
Internet map (Carna Botnet)
http://census2012.sourceforge.net/
Quantum network maps
https://www.slideshare.net/ADVAOpticalNetworking/how-to-quantumsecure-optical-networks
http://www.secoqc.net/html/press/pressmedia.html
IBM Quantum
http://research.ibm.com/ibm-q/
Music:
YouTube audio library:
Blue Skies
Incompetech:
Jay Jay
Pamgaea
The House of Leaves
Premium Beat:
Cutting Edge Technology
Second Time Around
Swoosh 1 sound effect came from here:
http://soundbible.com/682-Swoosh-1.html
...and is under this license:
https://creativecommons.org/licenses/sampling+/1.0/

Views: 664151
Frame of Essence

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: 31800
Sylvain Saurel

In this talk, we recount how we found the first SHA-1 collision. We delve into the challenges we faced from developing a meaningful payload, to scaling the computation to that massive scale, to solving unexpected cryptanalytic challenges that occurred during this endeavor.
By Elie Bursztein
Read More: https://www.blackhat.com/us-17/briefings/schedule/index.html#how-we-created-the-first-sha-1-collision-and-what-it-means-for-hash-security-7693

Views: 8554
Black Hat

Reach me at linked in:
www.linkedin.com/in/sameer-pasha-7aba6393
This video briefs on encryption, decryption and generating as well as verifying digital signatures.
=============
NOTE:
Replace GREATER-ARROW with angle-bracket below, as angle-brackets are not allowed in description.
Commands used:
Generate hash:
md5sum Plaintext.txt
gcc hash_func.c -lcrypto
Encrypt a file:
openssl enc -aes-128-cbc -in Plaintext.txt -K ABCDEF12345 -iv ABCDEF GREATER-ARROW Cipher.txt
Decrypt a file:
openssl enc -d -aes-128-cbc -in Cipher.txt -K ABCDEF12345 -iv ABCDEF
Generate a detached signature:
openssl smime -binary -sign -in Plaintext.txt -signer PK.crt -inkey PK.key -outform pem -out file.p7b
Dump signature contents:
openssl asn1parse -in file.p7b -dump -i
====
Generating digital-signature:
sha1sum Plaintext.txt | cut -d ' ' -f 1 GREATER-ARROW hash
openssl enc -aes-128-cbc -in hash -K ABCDEF12345 -iv ABCDEF GREATER-ARROW Signature.bin
Verifying digital-signature:
sha1sum Plaintext.txt | cut -d ' ' -f 1 GREATER-ARROW hash_1
openssl enc -d -aes-128-cbc -in Signature.bin -K ABCDEF12345 -iv ABCDEF GREATER-ARROW hash_2
cat hash_1
cat hash_2

Views: 2676
Sameer Pasha

Java tutorial on how to encrypt and decrypt files using DES algorithm implementation in Java programming language

Views: 7904
Zoran Davidović

by Gilles Van Assche
At: FOSDEM 2017
Since its adoption as the SHA-3 standard, Keccak has grown out of the merehashing functionality. We present a consistent set of cryptographic functions,for fast hashing, pseudo-random bit generation, authentication orauthenticated encryption, that enjoy very competitive safety margin vs speedratios. We highlight the bases for the security of these functions and diveinto their software implementations.
Beyond the FIPS 202 standard functions derived from Keccak (i.e., SHA-3 hashfunctions and SHAKE{128,256} extendable output functions), we present severalinteresting proposals, consistently based on the same permutation or its roundfunction. Among others:
* For authenticated encryption, Ketje and Keyak are schemes that were selected for the third round of the [CAESAR competition](http://competitions.cr.yp.to/caesar-submissions.html). In particular, Keyak proposes interesting features when protecting a stream of data flowing on a network. It exploits the parallelism in modern processors to achieve a high throughput. * [KangarooTwelve](http://eprint.iacr.org/2016/770.pdf) is a recently published arbitrary-output-length hash function. We designed it so that the implementation can automatically adapt to the available degree of parallelism. On Intel's Haswell and Skylake architectures, it achieves a speed below 1.5 cycles/byte for long inputs.
Two key aspects will be covered.
First, the essential goal of these functions is to remain secure despiteadvances in cryptanalysis. We will explain explain how we base the security ontwo strong pillars: the track record of third-party cryptanalysis and thegeneric security of the underlying construction.
Second, we will explore the [Keccak CodePackage](https://github.com/gvanas/KeccakCodePackage) and its two-levelstructure. The high-level cryptographic services are implemented in plain C,without any specific optimizations. The low-level services implement thepermutations and the state input/output functions, for which we provideoptimized code for different platforms. Another interesting topic to discussis how the parallelism is exploited on modern processors with SIMD units.
Room: Janson
Scheduled start: 2017-02-05 09:00:00

Views: 89
FOSDEM

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: 48698
ProgrammingKnowledge

This tutorial is an introduction to hash tables. A hash table is a data structure that is used to implement an associative array. This video explains some of the basic concepts regarding hash tables, and also discusses one method (chaining) that can be used to avoid collisions.
Wan't to learn C++? I highly recommend this book http://amzn.to/1PftaSt
Donate http://bit.ly/17vCDFx
STILL NEED MORE HELP?
Connect one-on-one with a Programming Tutor. Click the link below:
https://trk.justanswer.com/aff_c?offer_id=2&aff_id=8012&url_id=238
:)

Views: 785203
Paul Programming

Lecture 2 some basic vocabulary of computer and network reverse circle cipher for personal security (pdf encryption algorithms sorcery. The type and january 17, 2012cryptography network security. The term cipher is sometimes used as a synonym for ciphertext, but it more properly means the method of encryption rather than result in cryptography, (or cypher) an algorithm performing or decryption some systems both codes and ciphers one system, using superencipherment to increase security. Plaintext is what you have before encryption, and ciphertext the encrypted result. Encryption schemes are based on block or stream ciphers. Origin of the only security service these systems provide is confidentiality information in cryptography, cipher text (ciphertext) data that has been encrypted. Poly alphabetic cipher in network security mybscit. Chapter 3 block ciphers and the in network security as streams are widely used to protecting privacy of digital information. Key info used in cipher known only to network securityfifth edition by william stallings. Googleusercontent search. A variety of attacks against stream cipher exist;(algebraic and 16 aug 2016 the following example explains about poly alphabetic in netwrork security cryptography network select ciphertext obtain plaintext to attack either or en decrypt 30 apr 2017 lecture notes on computer by avi kak deciphering decryption recovering from also, ciphers for such as diffie hellman rsa require large number bits. Design and analysis of stream cipher for network security. What is cipher? Definition from whatis searchsecurity. William stallings, cryptography and network security 3 e. This paper suggests a simple block cipher scheme to effectively there are several types of data encryptions which form the basis network security. Lecture 3 block ciphers and desdepartment of it, bo akademi universityunconditional security. Cryptography and encryptions,network security,caesar cipherunit 1 symmetric cipher mod modelcryptography network security chapter 3. No matter how much computer power is available, the cipher cannot be broken since ciphertext provides insufficient What cipher? Definition from whatis searchsecurity. Cryptography and network security 3 e. A cipher (pronounced sai fuhr) is any method of encrypting text (concealing its readability and meaning). In addition to the cryptographic meaning, cipher also means (1) someone insignificant, and (2) a combination of symbolic letters as in an entwined weaving for monogram ciphertext is encrypted text. What is ciphertext? Definition from whatis what a cipher? techopediawhat cipher text (ciphertext)? Webopedia definition. Techtarget definition cipher url? Q webcache. Cryptography and network security bo akademi. Isbn 0 88385 622 william stallings, cryptography and network security, principles practices, 4th edition a cipher enables private communication is often used in email, so that if an encrypted message intercepted by unauthorized user, the cannot trad

Views: 296
Aile Aile

Hash functions are a fun cryptographic concept which map arbitrarily long data into a fixed-length space. In most cases, they are collision-resistant and non-reversible.
In this video, I talk about hash functions, their definition, and give examples of hash function output using Python. I also demo a small program which compares hash vs byte comparison for files.
Wikipedia Article on Hash Functions: https://en.wikipedia.org/wiki/Hash_function
An excellent (advanced) writeup on Hash Functions: https://cseweb.ucsd.edu/~mihir/cse207/w-hash.pdf
The sample program I created: https://gist.github.com/brandonio21/30fe3c81a6e763c9aaba047e70a78ebf

Views: 407
BrandonioProductions

Why encrypted group messaging isn't as secure as point to point. Dr Mike Pound explains this ongoing problem.
Instant Messaging & the Signal Protocol: https://youtu.be/DXv1boalsDI
Double Ratchet Messaging Encryption: https://youtu.be/9sO2qdTci-s
Relevant paper: https://eprint.iacr.org/2017/666.pdf
https://www.facebook.com/computerphile
https://twitter.com/computer_phile
This video was filmed and edited by Sean Riley.
Computer Science at the University of Nottingham: https://bit.ly/nottscomputer
Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com

Views: 171202
Computerphile

A look at what server administrators should be doing to secure their users' passwords—and how a lot of them AREN'T doing it.
UPDATE: Collision found in SHA-1 hashing algorithm: http://thehackernews.com/2017/02/sha1-collision-attack.html
Consumer Password Worst Practices: http://www.imperva.com/docs/wp_consumer_password_worst_practices.pdf
Salted Password Hashing - Doing it Right: https://crackstation.net/hashing-security.htm
Comparing Bank Password Requirements: https://docs.google.com/spreadsheets/d/1Z_qscNYF4fjzKoD79FlRpTV0LOw0VxceS8F16aFJoN4/edit
MD5 considered harmful today http://www.win.tue.nl/hashclash/rogue-ca/

Views: 6782
Shane Killian

In segment 1.1 we're going to talk about cryptographic hash functions. We'll talk about what they are, and what their properties are. And then later we'll move on and talk about what their applications are.
A lecture from the Coursera course Bitcoin and Cryptocurrency Technologies, as taught by Arvind Narayanan, Joseph Bonneau, Edward Felten, Andrew Miller, and Steven Goldfeder of Princeton University.
Enroll in the Coursera course at https://www.coursera.org/learn/cryptocurrency.
Check out a free draft of the textbook at https://d28rh4a8wq0iu5.cloudfront.net/bitcointech/readings/princeton_bitcoin_book.pdf.

Views: 752
Colin McDonnell

Sha 512 Hash Algorithm ...
Facebook Link- https://www.facebook.com/guidetubetuts/

Views: 4276
Guide-Tube

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Password Encryption.java
JAVA ENCRYPTION/DECRYPTION PROGRAM HELP
Encrypting and Decrypting Java
Cryptography using Java in Netbeans IDE
Cryptography using Java in Netbeans IDE
Java Cryptography APIs
Cryptography
Encrypting and Decrypting a text file in java

Views: 101388
ProgrammingKnowledge

This video describes the key generation for the DSA. An example with artificially small numbers is also given

Views: 7533
Leandro Junes

PWLMini by David Ashby on SHA256!
Meetup: http://bit.ly/2EBpwVL
Paper: http://bit.ly/2EFx1uP
Slides: http://bit.ly/2CI2r5X
Audio: http://bit.ly/2CuJsfG
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Sponsored and hosted by Two Sigma (@twosigma)
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Description
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While most of us use hash functions on a daily basis, few people can say that they truly understand what’s actually going on when they call SHA2("hello world"). Even fewer can say they’ve bothered to implement the function themselves, considering every introduction to cryptography starts off with a big warning saying to never, ever implement cryptographic primitives and just use vetted libraries due to the security implications. Of course, that important warning didn’t stop me from digging into the FIPS 180-4 spec (http://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.180-4.pdf) to scratch the itch to understand how exactly it works, and along the way get a much better intuition about what bitwise operators actually do, what a bit rotation is, and why hex notation actually matters.
Bio
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David Ashby (https://twitter.com/alazyreader) is a self-taught programmer and systems engineer who sometimes spends his weekends implementing hash functions in high-level languages. He also helps organize the meetup, but no nepotism was to blame for the existence of this presentation.

Views: 661
PapersWeLove

A high-level explanation of digital signature schemes, which are a fundamental building block in many cryptographic protocols.
More free lessons at: http://www.khanacademy.org/video?v=Aq3a-_O2NcI
Video by Zulfikar Ramzan. Zulfikar Ramzan is a world-leading expert in computer security and cryptography and is currently the Chief Scientist at Sourcefire. He received his Ph.D. in computer science from MIT.

Views: 141423
Khan Academy