Design of programmable cellular automata based cipher scheme

This paper presents an originally encryption system implemented on a structure of hybrid additive programmable cellular automata (HAPCA). As the development of cellular automata (CA) applications is generally an experimental effort, the research implies the exploration through simulation of the huge space of cellular automata local rules and global states. The encryption and decryption modules are identically and the cryptosystem is featured by its large key space and high speed due to cellular automata´s parallel information processing. The method supports both software and hardware implementation. In this paper we present a fully functional software application for the data encryption of Yahoo messenger conversations.