Cryptanalysis and Improvement of an Improved Two Factor Authentication Scheme for Telecare Medicine Information Systems

Abstract

Telecare medical information systems (TMIS) aim to provide healthcare services remotely. Efficient and secure mechanism for authentication and key agreement is required in order to guarantee the security and privacy of patients in TMIS.

After checking the manuscript again a crucial error was founded in the section " Security weaknesses of Amin et al.'s scheme". In fact Amin et al.'s scheme resists offline password guessing attacks but the manuscript claims that it doesn't