https://github.com/codlocker/cryptography_algos

Implementing different Cryptography Algorithms
https://github.com/codlocker/cryptography_algos

cipher cryptography

Last synced: 22 days ago
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Implementing different Cryptography Algorithms

• Host: GitHub
• URL: https://github.com/codlocker/cryptography_algos
• Owner: codlocker
• Created: 2017-02-09T09:44:02.000Z (almost 8 years ago)
• Default Branch: master
• Last Pushed: 2017-03-11T21:47:51.000Z (over 7 years ago)
• Last Synced: 2024-10-08T02:50:53.401Z (about 1 month ago)
• Topics: cipher, cryptography
• Language: HTML
• Homepage: https://codlocker.github.io/Cryptography_Algos/html/index.html
• Size: 433 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
IMPLEMENTING CRYPTOGRAPHY ALGORITHMS            {#mainpage}

====================================

Documentation for the Algorithms used

------------------------

> Basic implementation of Classical Cipher Algorithms. The aim of the 

> repository is to include implementation of major cipher algorithms

> during the course

1. [PlayFair Cipher](https://en.wikipedia.org/wiki/Playfair_cipher)

   > The technique encrypts pairs of letters (bigrams or digrams), 

   > instead of single letters as in the simple 

   > substitution cipher and rather more complex Vigenère cipher systems 

   > then in use. The Playfair is thus significantly harder 

   > to break since the frequency analysis used for simple substitution ciphers does not work with it.

2. [Route Cipher](https://en.wikipedia.org/wiki/Transposition_cipher#Route_cipher) 

   + Encryption to Cipher text

   

        The implementation of Route Cipher is similar to a spiral matrix

        where the key is a matrix written as spiral inwards, starting 

        from top right.

   

   + Decryption of the Cipher text

3. [Row Transposition Cipher](https://en.wikipedia.org/wiki/Transposition_cipher#Columnar_transposition)

    + Single Encryption

4. [DES Key generation and first step Encryption](https://www.tutorialspoint.com/cryptography/data_encryption_standard.htm)

    > DES is an implementation of a Feistel Cipher. It uses 16 round Feistel structure. 

    > The block size is 64-bit. Though, key length is 64-bit, DES has an effective key length of 56 bits, since 8 of the 64 bits of the 

    > key are not used by the encryption algorithm (function as check bits only). General Structure of DES is depicted in the following illustration −