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Title:
Cryptanalysis of a timestamp-based password authentication scheme
Authors: Lizhen Yang, Kefei Chen
Abstract:Recently, J.-J. Shen, C.-W. Lin and M.-S. Hwang (Computers & Security, Vol 22, No 7, pp 591-595, 2003) proposed a modified Yang-Shieh scheme to enhance security. They claimed that their modified scheme can withstand the forged login attack and also provide a mutual authentication method to prevent the forged server attack. In this paper, we show that the Shen-Lin-Hwang scheme cannot resist the forged login attack either. The intruder is able to forge a valid forge request of a legitimate user Ui and then successfully impersonate him by intercepting a login request sent by Ui and registering a smart card.
ePrint: https://eprint.iacr.org/2004/040
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