JKrypto A program for creating and analyzing classical ciphers
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JKrypto Description

JKrypto is an advanced utility designed to enable you to create and analyze classical substitution and transposition ciphers. You can use JKrypto to encrypt/decrypt text messages using either a mono or polyalphabetic vigenere, beauford or general substitution cipher, using an alphabetic key to specify the alphabets; or using a row or column transposition cipher given a key which is either a word or a permutation. You can also use jkrypto to analyse ciphers of these forms by tabulating or graphing frequency distributions and computing IC's over 1 or multiple alphabets; searching for repeated strings of a specified size to implement the kasiski method; exhaustively searching all row or column permutations to match a search string to break these transpositions, and to reformat the data into a specified block size and number per line. These can be used to assist an analyst to break modest sized ciphers of these types.

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