Cryptanalysis of Zhian Zhu’s Scheme and Evaluation of TMIS Smart Card Authentication Schemes

The security for Telecare Medicine Information Systems (TMIS) is extremely vital. In this context, numerous TMIS-based authentication schemes have been introduced, however different types of attacks and inefficiencies render these schemes inappropriate for this scenario. This paper investigates various TMIS-based authentication schemes present in the literature. It additionally compares these schemes based on computation cost and potential security attacks. Further, it also demonstrates that Zhian Zhu’s scheme is inaccurate as the server fails to approve and validate the login request message of a user in the authentication phase.