Password authentication with insecure communication
Communications of the ACM
Examining Smart-Card Security under the Threat of Power Analysis Attacks
IEEE Transactions on Computers
A More Secure Authentication Scheme for Telecare Medicine Information Systems
Journal of Medical Systems
A remote password authentication scheme for multiserver architecture using neural networks
IEEE Transactions on Neural Networks
Security and Communication Networks
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Recently, Pippal et al. proposed an authentication scheme for multi-server architecture and claimed that their scheme could withstand various attacks. In this paper, we will analyse the security of Pippal et al.'s scheme. After reviewing their scheme, we find that their scheme cannot withstand the server spoofing attack, the user impersonation attack, the offline password guessing attack and the privileged insider attack. The analysis shows their scheme is not secure for practical applications.