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An Analysis of SAFER
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Sean Murphy1
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Information Security Group, Royal Holloway, University of London, Egham, Surrey TW20 0EX, England, UK |
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.
Key words. Block cipher, SAFER, Cryptanalysis, Invariant \Z -submodules.
Received 12 June 1995 and revised 22 July 1997
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