R. Madhusudhan

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Currently, smart card based remote user authentication schemes have been widely adopted due to their low cost and convenient portability. With the purpose of using various different internet services with single registration and to protect the users from being tracked, various dynamic ID based multi-server authentication protocols have been proposed.(More)
Remote user authentication is a mechanism, in which the remote server verifies the legitimacy of a user over an insecure communication channel. Recently, Wang and Li proposed a fingerprint-based remote user authentication scheme using mobile devices. We demonstrate that their scheme is vulnerable and susceptible to many attacks and has some practical(More)
In a distributed environment, one of the major concerns is authentication of remote users. In this sector, legitimate users are more powerful attackers. The remote systems working with password and smart card ensures authorised access. Smart card based remote user authentication schemes have been adopted due to their low computation cost and portability. In(More)
User authentication is a very important securitymechanism for accessing the services while roaming in theglobal mobility networks. However, the authentication schemesdesigned are vulnerable to the attacks, hence new requirementsshould be employed while designing a scheme. In 2014 Gopeand Hwang proposed an efficient mutual authentication andkey agreement(More)
In global mobile network, it is essential to authenticate mobile users and provide secure communication between a user, foreign agent and the home agent using session key. Designing a secure and efficient authentication protocol for roaming users in mobile network is a challenging. The authors wen et al. analyzed Jiang et al. authentication scheme recently(More)
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