Anonymous password-based authenticated key exchange

  • Authors:
  • Duong Quang Viet;Akihiro Yamamura;Hidema Tanaka

  • Affiliations:
  • Department of Information and Networks Systems, National Institute of Information and Communications Technology, Tokyo, Japan;Department of Information and Networks Systems, National Institute of Information and Communications Technology, Tokyo, Japan;Department of Information and Networks Systems, National Institute of Information and Communications Technology, Tokyo, Japan

  • Venue:
  • INDOCRYPT'05 Proceedings of the 6th international conference on Cryptology in India
  • Year:
  • 2005

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Abstract

We propose and discuss an anonymous password-based authenticated key exchange scheme that allows a user in a group to establish a session key with a server in an anonymous way. In our scheme, each user in a legitimate group and the server share a human-memorable password, and they can authenticate each other. The scheme is secure against the dictionary attack. Furthermore, we extend this to the scheme that allows any subgroup of at least k-out-of-n users of the group to establish a session key with the server in an anonymous way.