The Bellaso cipher is a method of encrypting alphabetic text by using a series of interwoven Caesar ciphers, based on the letters of a keyword. It employs a form of [polyalphabetic substitution] (https://en.wikipedia.org/wiki/Polyalphabetic_cipher).

Kasiski Examination

Astra implementation of Vigenere Auto Encipherment. The Vigenre cipher is a method of encrypting alphabetic text by using a series of different Caesar ciphers based on the letters of a keyword. It is a simple form of polyalphabetic substitution. The term Auto-Encipherment refers to ciphers in which the plaintext serves as its own key-phrase in t…

GTU Information and Network Security ( INS ) in python .

PolyAlphabetic Cipher

A program which performs a frequency analysis on a sample of English text and attempts a cipher-attack on polyalphabetic substitution ciphers using 2 famous methods - Kasiski's and Friedman's.

Program to methodically decrypt text encrypted with Vigenère Cipher