Cryptology ePrint Archive: Report 2005/209

Comments on Weaknesses in Two Group Diffie-Hellman Key Exchange Protocols

Jin Wook Byun and Dong Hoon Lee

Abstract: In [3], Tang presented two password guessing attacks such as off-line and undetectable on-line dictionary attacks against password-based group Diffie-Hellman key exchange protocols by Byun and Lee [2]. In this paper, we present countermeasures for two attacks by Tang.

Category / Keywords: cryptographic protocols / countermeasure, password authentication, group key exchange

Date: received 30 Jun 2005

Contact author: byunstar at korea ac kr

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Version: 20050701:052944 (All versions of this report)

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