Cryptology ePrint Archive: Report 2006/028

Cryptanalysis of recently proposed Remote User Authentication Schemes

Thulasi Goriparthi, Manik Lal Das, Atul Negi and Ashutosh Saxena

Abstract: Recently Manik et al. [13] proposed a novel remote user authentication scheme using bilinear pairings. Chou et al. [14] identified a weakness in Manik et al.ís scheme and made an improvement. In this paper, we show that both Manik et al.ís and Chou et al.ís schemes are insecure against forgery attack and replay attack.

Category / Keywords: cryptographic protocols / bilinear pairings, security, authentication, smart card

Publication Info: not be duplicates of work published previously or scheduled to be published

Date: received 23 Jan 2006, last revised 6 Mar 2006

Contact author: asaxena at idrbt ac in

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Version: 20060306:090904 (All versions of this report)

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