FOX: a new family of block ciphers

  • Authors:
  • Pascal Junod;Serge Vaudenay

  • Affiliations:
  • École Polytechnique Fédérale de Lausanne, Switzerland;École Polytechnique Fédérale de Lausanne, Switzerland

  • Venue:
  • SAC'04 Proceedings of the 11th international conference on Selected Areas in Cryptography
  • Year:
  • 2004

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Abstract

In this paper, we describe the design of a new family of block ciphers based on a Lai-Massey scheme, named FOX. The main features of this design, besides a very high security level, are a large implementation flexibility on various platforms as well as high performances. In addition, we propose a new design of strong and efficient key-schedule algorithms. We provide evidence that FOX is immune to linear and differential cryptanalysis, and we discuss its security towards integral cryptanalysis, algebraic attacks, and other attacks.