On a limitation of BAN logic

  • Authors:
  • Colin Boyd;Wenbo Mao

  • Affiliations:
  • Univ. of Manchester, U.K.;Univ. of Manchester, U.K.

  • Venue:
  • EUROCRYPT '93 Workshop on the theory and application of cryptographic techniques on Advances in cryptology
  • Year:
  • 1994

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Abstract

In the past few years a lot of attention has been paid to the use of special logics to analyse cryptographic protocols, foremost among these being the logic of Burrows, Abadi and Needham (the BAN logic). These logics have been successful in finding weaknesses in various examples. In this paper a limitation of the BAN logic is illustrated with two examples. These show that it is easy for the BAN logic to approve protocols that are in practice unsound.