Efficient Design of ENCA Based Cipher System
Dhruba K. Bhattacharyya, Sukumar Nandi · IETE Journal of Research · 2000
This paper presents two simple, secure block ciphering schemes designed based on the group properties of the Extended Neighbourhood Cellular Automata (ENCA). The encipherment and decipherment procedures of the schemes follow the similar protocols. Due to the nonlinear ENCA operations and many-to-many mapping among the plaintext and ciphertext characters, the measure of strength of the proposed scheme against intrusion can be found to be comparable with the existing schemes. There are further scopes to improve the complexity by increasing the size of the message block as well as the CAs. The simplified logic structure makes the schemes more significant from the implementation point of view.