A reverse iteration encryption scheme using layered cellular automata

A new reverse iterative block encryption scheme using layered cellular automata with T-shaped neighborhood is proposed in this paper. Specifically, based on the T-shaped neighborhood structure, we generate some two order reversible rules and then set the plaintext as the final configuration of a 4-layer CA. Considering the definition of the two order rule, we employ a random sequence as the pre-configuration of the 4-layer CA and keep it as the key with the generated rule, and then backward evolve the CA to get its initial configuration, which is set as the corresponding cipher text. Comprehensive security analysis shows that the proposed scheme is security against statistical, linear and differential cryptanalysis techniques. In addition, the timing analysis demonstrates that the proposed scheme is more efficient than AES algorithm.