Cryptology ePrint Archive: Report 2012/257

The Transformation from the Galois NLFSR to the Fibonacci Configuration

Lin Zhiqiang

Abstract: The Galois configuration of Nonlinear Feedback Shift Registers (NLFSRs) is attractive for stream ciphers for which high throughput is very important. In this paper, we prove that any Galois NLFSR can be transformed into an equivalent NLFSR in the Fibonacci configuration, which is the conventional con guration of NLFSRs. The transformation is mentioned in the proof. The mapping between the initial states of the Galois NLFSR and its equivalent Fibonacci configuration is also derived. Moreover, some properties of Galois NLFSRs are presented.

Category / Keywords: Fibonacci NLFSR, Galois NLFSR, pseudo-random sequence, initial state, stream cipher

Date: received 7 May 2012, withdrawn 13 May 2012

Contact author: linzhiqiang0824 at yahoo cn

Available format(s): (-- withdrawn --)

Version: 20120513:121306 (All versions of this report)

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