Efficient Password-Based Group Key Exchange

• Autores: Su Mi Lee, Jung Yeon Hwang, Dong Hoon Lee
• Localización: Trust and Privacy in Digital Business: First International Conference,TrustBus 2004 Zaragoza, Spain, August 30 - September 1, 2004 Proceedings / coord. por Sokratis Katsikas, Günther Pernul, Javier López, 2004, ISBN 3540229191, págs. 191-199
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • Password-based authenticated group key exchange (denoted by PGKE) provides n parties holding a common human-memorable password with secure group communication. Most PGKE protocols proposed so far are inefficient since they require O(n) communication rounds where n is the number of group members. In the paper, we propose the first 2-round PGKE protocol with 3-exponentiations required per user and prove its security in the random oracle model and the ideal cipher model under the intractability of the decision Diffie-Hellman problem and computation Diffie-Hellman problem. The proposed protocol also provides forward secrecy.