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).

PolyAlphabitec Cipher in python

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.

Enigma PolyAlphabetic Ciphering Method Emulator

PolyAlphabetic Cipher