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Password-Authenticated Key Exchange between Clients with Different Passwords

  • Jin Wook Byun
  • Ik Rae Jeong
  • Dong Hoon Lee
  • Chang-Seop Park
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2513)

Abstract

Most password-authenticated key exchange schemes in the literature provide an authenticated key exchange between a client and a server based on a pre-shared password. With a rapid change in modern communication environments, it is necessary to construct a secure end-to-end channel between clients, which is a quite different paradigm from the existing ones. In this paper we propose a new framework which provides a password-authenticated key exchange between clients based only on their two different passwords without any pre-shared secret, so called Client-to-Client Pas sword-Authenticated Key Exchange (C2C-PAKE). Security notions and types of possible attacks are newly defined according to the new framework. We prove our scheme is secure against all types of attacks considered in the paper. Two secure C2C-PAKE schemes are suggested, one in a cross-realm setting and the other in a single-server setting.

Keywords

Password authentication key exchange cross-realm Kerberos dictionary attack 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2002

Authors and Affiliations

  • Jin Wook Byun
    • 1
  • Ik Rae Jeong
    • 1
  • Dong Hoon Lee
    • 1
  • Chang-Seop Park
    • 2
  1. 1.Center for Information Security Technologies(CIST)Korea UniversitySeoulKorea
  2. 2.Division of Computer Science & ElectronicsDankook UniversityCheonanKorea

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