NOCAS

 swMATH ID: 19584 Software Authors: Karmakar, Sandip; Chowdhury, Dipanwita Roy Description: NOCAS: a nonlinear cellular automata based stream cipher. LFSR and NFSR are the basic building blocks in almost all the state of the art stream ciphers like Trivium and Grain-128. However, a number of attacks are mounted on these type of ciphers. Cellular Automata (CA) has recently been chosen as a suitable structure for crypto-primitives. In this work, a stream cipher is presented based on hybrid CA. The stream cipher takes 128 bit key and 128 bit initialization vector (IV) as input. It is designed to produce $$2^{{128}}$$ random keystream bits and initialization phase is made faster 4 times than that of Grain-128. We also analyze the cryptographic strength of this cipher. Finally, the proposed cipher is shown to be resistant against known existing attacks. Homepage: https://hal.inria.fr/hal-01196137 Keywords: cellular automata; stream cipher; NMix; hybrid nonlinear cellular automata Related Software: Grain; Trivium Referenced in: 1 Publication

Referenced by 2 Authors

 1 Roy Chowdhury, Dipanwita 1 Karmakar, Sandip

Referenced in 2 Fields

 1 Computer science (68-XX) 1 Information and communication theory, circuits (94-XX)