Lattice Gas Symmetric Cryptography

Lattice gas cellular automata (Lgca) are particular cellular automata that imitate the behavior of particles moving on a lattice. We used a particular set of Lgca rules, called hpp, to mix bits in data blocks and obtain a symmetric cryptographic algorithm. The encryption and decryption keys are the positions of perturbation sites on the lattice (walls). Basically, this paper presents an original way to perform cryptographic operations, based on cellular automata. In this paper, we show several characteristics about our algorithm: typical block size (22n−1), key-length (2), number of rounds (2). We also evaluate avalanche and strict avalanche properties with respect to key and plain text. Finally, we highlight the underbellies of our method and give clues to solve them.