jkrypto
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jkrypto Description

Easily create and analyze classical substitution and transposition ciphers jkrypto is a free and easy to use Java program which can be used to create and analyze classical substitution and transposition ciphers.You can use jkrypto to en/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. Requirements: · Java 1.5 or later

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