Provably secure MACs from differentially-uniform permutations and AES-Based implementations

  • Authors:
  • Kazuhiko Minematsu;Yukiyasu Tsunoo

  • Affiliations:
  • NEC Corporation, Kawasaki, Japan;NEC Corporation, Kawasaki, Japan

  • Venue:
  • FSE'06 Proceedings of the 13th international conference on Fast Software Encryption
  • Year:
  • 2006

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Abstract

We propose message authentication codes (MACs) that combine a block cipher and an additional (keyed or unkeyed) permutation. Our MACs are provably secure if the block cipher is pseudorandom and the additional permutation has a small differential probability. We also demonstrate that our MACs are easily implemented with AES and its 4-round version to obtain MACs that are provably secure and 1.4 to 2.5 times faster than the previous MAC modes of AES such as the CBC-MAC-AES.