EnCash: an Authenticated Encryption scheme using Cellular Automata.

In this paper, we present a new Cellular Automata (CA) based authenticated encryption scheme, named as EnCash. Both for encryption and authentication, it proposes a CA-based cost-effective design structure. Encryption follows the substitution-permutation-network (SPN) where, at the substitution layer, randomized mapping is introduced and cellular automata, both linear and non-linear are used for the permutation. We perform the cryptanalysis of the substitution table and also the Strict Avalanche Criterion test for the encryption function. The results assure the security of EnCash.