Remote user authentication is a mechanism, in which the remote server verifies the
legitimacy of a user over an insecure communication channel. Until now, there have been …

Despite two decades of intensive research, it remains a challenge to design a practical
anonymous two-factor authentication scheme, for the designers are confronted with an …

The recent proliferation of mobile devices, such as smartphones and wearable devices has
given rise to crowdsourcing Internet of Things (IoT) applications. E-healthcare service is one …

E-Healthcare is an emerging field that provides mobility to its users. The protected health
information of the users are stored at a remote server (Telecare Medical Information System) …

Anonymity is among the important properties of two-factor authentication schemes for
wireless sensor networks (WSNs) to preserve user privacy. Though impressive efforts have …

The security of vehicular ad hoc networks (VANETs) has been receiving a significant amount
of attention in the field of wireless mobile networking because VANETs are vulnerable to …

Authenticated key exchange (AKE) protocol allows a user and a server to authenticate each
other and generate a session key for the subsequent communications. With the rapid …

Many authentication schemes have been proposed for telecare medicine information
systems (TMIS) to ensure the privacy, integrity, and availability of patient records. These …

Advancement in network technology provides new ways to utilize telecare medicine
information systems (TMIS) for patient care. Although TMIS usually faces various attacks as …

Due to its simplicity, portability and robustness, two-factor authentication has received much
interest in the past two decades. While security-related issues have been well studied, how …