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Cryptanalysis of Password Authenticated Key Exchange Based on RSA for Imbalanced Wireless Networks
IEICE TRANSACTIONS on Communications
Publication Date: 2005/06/01
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Fundamental Theories for Communications
key exchange, password, guessing attack, wireless network,
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Recently, Yeh et al. proposed an improvement on Zhu et al.'s password based authenticated key exchange protocol based on RSA, in order to make the protocol withstand undetectable on-line password guessing attacks and also to provide explicit key authentication. The improved scheme, however, is still susceptible to off-line password guessing attacks. Accordingly, the current letter demonstrates the vulnerability of Yeh et al.'s scheme regarding off-line password guessing attacks.