Authentication and authenticated key exchanges
Designs, Codes and Cryptography
An attack on the Needham-Schroeder public-key authentication protocol
Information Processing Letters
Password authentication with insecure communication
Communications of the ACM
Examining Smart-Card Security under the Threat of Power Analysis Attacks
IEEE Transactions on Computers
CRYPTO '99 Proceedings of the 19th Annual International Cryptology Conference on Advances in Cryptology
A Flexible User Authentication Scheme for Multi-server Internet Services
ICN '01 Proceedings of the First International Conference on Networking-Part 1
An Efficient and Secure Multi-Server Password Authentication Scheme using Smart Cards
CW '04 Proceedings of the 2004 International Conference on Cyberworlds
AINA '05 Proceedings of the 19th International Conference on Advanced Information Networking and Applications - Volume 2
A Password-Based Authentication and Key Establishment Scheme for Mobile Environment
AINAW '07 Proceedings of the 21st International Conference on Advanced Information Networking and Applications Workshops - Volume 02
Security Weaknesses in Chang and Wu's Key Agreement Protocol for a Multi-Server Environment
ICEBE '08 Proceedings of the 2008 IEEE International Conference on e-Business Engineering
Security enhancement for password authentication schemes with smart cards
TrustBus'05 Proceedings of the Second international conference on Trust, Privacy, and Security in Digital Business
A simple remote user authentication scheme
Mathematical and Computer Modelling: An International Journal
A new remote user authentication scheme using smart cards
IEEE Transactions on Consumer Electronics
An efficient remote use authentication scheme using smart cards
IEEE Transactions on Consumer Electronics
Efficient multi-server password authenticated key agreement using smart cards
IEEE Transactions on Consumer Electronics
A remote password authentication scheme for multiserver architecture using neural networks
IEEE Transactions on Neural Networks
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Recently, Liu et al. have proposed an efficient scheme for a remote user authentication using smart cards suited for a multi-server environment. This work reviews Liu et al,'s scheme and provides a security analysis on the scheme. Our analysis shows that Liu et al.'s scheme does not achieve its fundamental goal not only of mutual authentication bur also of password security. We demonstrate these by mounting a user impersonation attack and an off-line password guessing attack, respectively, on Liu et al.'s scheme.