Symmetrical Cryptosystems based on Cellular Automata

This paper deals with the development of two symmetric encryption algorithms on basis cellular automata: a block cipher, that is based AES and uses three-dimensional automata; stream exploits hardware-software entropy generation (tracking keystrokes mouse pointer movement), as well developed hash function, “cryptographic sponge” architecture SHA-3, modified by automata transformations. The cipher designed in SP-network substitution block. Permutation layer key rules (rules “22”, “105” “150”). optimal number rounds to achieve maximum crypto resistance determined. cryptographic hash-function SHA-3 architecture. function “30” “146”). procedures shift permutation rows columns used for better permutation. A final state elements improve avalanche effect. received results are analyzed summarized; conclusions justifications about parameters (like rounds, where needed) made.