An Analysis of SAFER

Abstract.

We investigate some of the algebraic properties of the SAFER block cipher when the message space is considered as a Z -module. In particular, we consider the invariant Z -submodules of the PHT layer and show how these invariant Z -submodules give potential cryptographic weaknesses.

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1. Information Security Group, Royal Holloway, University of London, Egham, TW20 0EX, Surrey, England

   Sean Murphy

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1. Sean Murphy
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Received 12 June 1995 and revised 22 July 1997

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Murphy, S. An Analysis of SAFER . J. Cryptology 11, 235–251 (1998). https://doi.org/10.1007/s001459900046

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• Published: 01 September 1998

• Issue Date: September 1998

• DOI: https://doi.org/10.1007/s001459900046

• Key words. Block cipher, SAFER, Cryptanalysis, Invariant \Z -submodules.