Search for: [Abstract = "Cellular Automata \(CA\) and their natural affinity for VLSI are discussed. Group behaviour of CA is related to that for modulo\-arithmetic units and this leads to an architecture for modulo multiplication. Implementation of a mod\-127 multiplier using two techniques, full custom CMOS design and Xilinx programmable gate arrays is described. The principle of operation is based on two identical 12x12, null\-bounded, CA each having semi\-group order 126."]