vCAT

Vigenere Cipher Analaysis Tool

A tool for exploring the cryptanalysis of single or known first keyword Vigenere ciphers using Turing's analysis and a small dictionary. If you don't have a ciphertext, skip to the end to generate one!

Ciphertext

Vigenere Table

Leave blank for the standard table (default).

 

Turing's Analysis

Guesses for length of message's keyword.

 

[optional] Keyword help

Use the current analysis to build a regex to match words in the dictionary.

 

Keyword

Enter a keyword below to decrypt the ciphertext.

 

Utilities

Encrypt

Enter a text below to encrypt using the above keyword.