Evolving Keys for Periodic Polyalphabetic Ciphers

Ralph Morelli, Ralph Walde

A genetic algorithm is used to find the keys of Type II periodic polyalphabetic ciphers with mixed primary alphabets. Because of the difficulty of the ciphertext only cryptanalysis for Type II ciphers, a multi-phased search strategy is used, each phase of which recovers a bigger portion of the key.

Subjects: 1.9 Genetic Algorithms; 15.7 Search

Submitted: Feb 12, 2006

This page is copyrighted by AAAI. All rights reserved. Your use of this site constitutes acceptance of all of AAAI's terms and conditions and privacy policy.