Cryptology ePrint Archive: Report 2002/095

The (a, b)-Shrinking Generator

Ali Adel Kanso

Abstract: A new construction of a pseudorandom generator based on a simple combination of two LFSRs is introduced. This construction allows users to generate a large family of sequences using the same initial states and the same characteristic feedback polynomials of the two combined LFSRs. The construction is related to the so-called shrinking generator that is a special case of this construction. The construction has attractive properties such as exponential period, exponential linear complexity, good statistical properties and security against correlation attacks. All these properties make it a suitable crypto-generator for stream cipher applications.

Category / Keywords: secret-key cryptography / Linear feedback shift registers, Stream Ciphers, Clock-controlled registers, and Shrinking generator.

Date: received 15 Jul 2002, withdrawn 5 Feb 2003

Contact author: akanso at hotmail com

Available format(s): (-- withdrawn --)

Version: 20030205:154023 (All versions of this report)

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