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Examples of applying Kasiski examination and Index of Coincidence along with Frequency analysis to restore cryptographic key of Vigenere encypted ciphertext and decrypt it.
Optimized for progressive key
Program to encrypt and decrypt Vigenère cipher, allowing the user to break it through frequency analysis.
The first project of the COMP543: Modern Cryptography, Koç University Fall 2022
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.
Vigenere cipher tool.
C implementation of the Vigènere cipher and the attack on it using Kasiski examination and frequence analysis