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http://dx.doi.org/10.6109/jkiice.2010.14.10.2283

Analysis of Shrunken-Interleaved Sequence Based on Cellular Automata  

Choi, Un-Sook (동명대학교)
Cho, Sung-Jin (부경대학교)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.14, no.10, 2010 , pp. 2283-2291 More about this Journal
Abstract
The shrinking generator which is one of clock-controlled generator is a very simple generator with good cryptographic properties. A nonlinear sequence generator based on two 90/150 maximum length cellular automata can generate pseudorandom sequences at each cell of cellular automata whose characteristic polynomials are same. The nonlinear sequence generated by cellular automata has a larger period and a higher linear complexity than shrunken sequence generated by LFSRs. In this paper we analyze shrunken-interleaved sequence based on 90/150 maximum length cellular automata. We show that the sequence generated by nonlinear sequence generator based on cellular automata belongs to the class of interleaved sequence. And we give an effective algorithm for reconstructing unknown bits of output sequence based on intercepted keystream bits.
Keywords
Shrunken genrator; interleaved sequence; nonlinear sequence; cellular automata; shrunken-interleaved sequence;
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