Weaknesses of a dynamic identity based authentication protocol for multi-server architecture
This work addresses security flaws in a specific authentication protocol, which is incremental as it critiques and exposes weaknesses in an existing method.
The paper identifies security vulnerabilities in Li et al.'s dynamic identity-based authentication protocol for multi-server architectures, demonstrating that it is susceptible to replay, password guessing, and masquerade attacks.
Recently, Li et al. proposed a dynamic identity based authentication protocol for multi-server architecture. They claimed their protocol is secure and can withstand various attacks. But we found some security loopholes in the protocol. Accordingly, the current paper demonstrates that Li et al.'s protocol is vulnerable to the replay attack, the password guessing attack and the masquerade attack.