A remote password authentication scheme based upon ElGamal's signature scheme
Computers and Security
Strong password-only authenticated key exchange
ACM SIGCOMM Computer Communication Review
Password authentication with insecure communication
Communications of the ACM
A remote user authentication scheme using hash functions
ACM SIGOPS Operating Systems Review
A hash-based strong-password authentication scheme without using smart cards
ACM SIGOPS Operating Systems Review
A new remote user authentication scheme using smart cards
IEEE Transactions on Consumer Electronics
A modified remote user authentication scheme using smart cards
IEEE Transactions on Consumer Electronics
A remote user authentication scheme using smart cards with forward secrecy
IEEE Transactions on Consumer Electronics
A dynamic ID-based remote user authentication scheme
IEEE Transactions on Consumer Electronics
Computer Standards & Interfaces
Improved remote user authentication scheme using bilinear pairings
Proceedings of the 2009 International Conference on Hybrid Information Technology
An efficient user authentication and key exchange protocol for mobile client-server environment
Computer Networks: The International Journal of Computer and Telecommunications Networking
Towards generalized ID-based user authentication for mobile multi-server environment
International Journal of Communication Systems
Future Generation Computer Systems
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Recently Das et al. proposed a novel remote user authentication scheme using bilinear pairings. Chou et al. identified a weakness in Das et al.'s scheme and made an improvement. In this paper, we show that both Das et al.'s and Chou et al.'s schemes are insecure against forgery and replay attacks. We proposed an improved scheme that overcomes the security flaws without affecting the merits of the original scheme.