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Enhanced Biometrics-based Remote User Authentication Scheme Using Smart Cards
Authentication and key exchange are fundamental techniques for
enabling secure communication over mobile networks. In order to
reduce implementation complexity and achieve computation
efficiency, design issues for efficient and secure
biometrics-based remote user authentication scheme have been
extensively investigated by research community in these years.
Recently, two well-designed biometrics-based authentication
schemes using smart cards are introduced by Li and Hwang and Li et
al., respectively. Li and Hwang proposed an efficient
biometrics-based remote user authentication scheme using smart
card and Li et al. proposed an improvement. The authors of both
schemes claimed that their protocol delivers important security
features and system functionalities, such as without synchronized
clock, freely changes password, mutual authentication, as well as
low computation costs. However, these two schemes still have much
space for security enhancement. In this paper, we first
demonstrate a series of vulnerabilities on these two schemes.
Then, an enhanced scheme with corresponding remedies is proposed
to eliminate all identified security flaws in both schemes
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