Comments on "Improved Efficient Remote User Authentication Schemes"

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Das, Manik Lal
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Abstract
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Recently, Tian et al presented an article, in which they discussed some security weaknesses of Yoon et al's scheme and subsequently proposed two ``improved'' schemes. In this paper, we show that the Tian et al's schemes are insecure and vulnerable than the Yoon et al's scheme.
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Computer Science - Cryptography and Security
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