XOR MACs: New Methods for Message Authentication Using Finite Pseudorandom Functions

  • Mihir Bellare
  • Roch Guérin
  • Phillip Rogaway
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 963)

Abstract

We describe a new approach for authenticating a message using a finite pseudorandom function (PRF). Our “XOR MACs” have several nice features, including parallelizability, incrementality, and provable security. The finite PRF can be “instantiated” via DES (yielding an alternative to the CBC MAC), via the compression function of MD5 (yielding an alternative to various “keyed MD5” constructions), or in a variety of other ways. The proven security is quantitative, expressing the adversary’s inability to forge in terms of her (presumed) inability to break the underlying finite PRF. This is backed by attacks showing the analysis is tight. Our proofs exploit linear algebraic techniques.

Keywords

Success Probability Random Function Block Cipher Message Authentication Code Message Authentication 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1995

Authors and Affiliations

  • Mihir Bellare
    • 1
  • Roch Guérin
    • 1
  • Phillip Rogaway
    • 2
  1. 1.IBM T.J. Watson Research CenterYorktown HeightsUSA
  2. 2.Dept. of Computer Science, Eng. II Bldg.University of CaliforniaDavisUSA

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