Grain: a stream cipher for constrained environments

Abstract. A new stream cipher, Grain, is proposed. The design targets hardware environments where gate count, power consumption and memory is very limited. It is based on two shift registers and a nonlinear filter function. The cipher has the additional feature that the speed can be increased at the expense of extra hardware. The key size is 80 bits and no attack faster than exhaustive key search has been identified. The hardware complexity and throughput compares favourably to other

• Type: Journal
• Year: 2007
• Where: IJWMC
• Authors: Martin Hell, Thomas Johansson, Willi Meier
• Keywords: Exhaustive Key Search, Hardware Environments, IJWMC 2007, Nonlinear filter Function