HB^+^+: a Lightweight Authentication Protocol Secure against Some Attacks

  • Authors:
  • Julien Bringer;Hervé Chabanne;Emmanuelle Dottax

  • Affiliations:
  • Sagem Defense Securite, France;Sagem Defense Securite, France;Sagem Defense Securite, France

  • Venue:
  • SECPERU '06 Proceedings of the Second International Workshop on Security, Privacy and Trust in Pervasive and Ubiquitous Computing
  • Year:
  • 2006

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Abstract

At Crypto'05, Juels and Weis introduce HB+, an enhancement of the Hopper and Blum (HB) authentication protocol. This protocol HB+ is proven secure against active attacks, though preserving HB's advantages: mainly, requiring so few resources to run that it can be implemented on an RFID tag. However, in a wider adversarial model, Gilbert, Robshaw and Sibert exhibit a very effective attack against HB+. We here show how a modification of the HB+ protocol thwarts Gilbert et al's attack. The resulting protocol, HB++, remains a good choice for RFID authentication.