A robust and efficient smart card based dynamic identity authentication protocol

The fast emerging of new technology called (IoT) i.e., Internet of Things technology, every network like WSN etc and every object like mobile phones, smart phones etc., can be interconnected via insecure public communication channel called Internet, to form scalable and inter operable networking system. IoT also brings numerous security challenges as it is working on top of Internet. Recently Liou et al. enhanced Das et al. protocol and asserted that the enhanced scheme assures strong mutual authentication and resistant to various attacks. Later Kuldip Singh et al. confirmed that Liou et al. scheme is susceptible to user impersonation attack, offline password guessing attack etc and projected an enhanced scheme. Unluckily, in this manuscript we will make clear that Kuldip et al. scheme cannot prevent any of the attacks they claimed that their scheme will prevent and as a part of our contribution we present our enhanced dynamic ID oriented remote user authentication design while preserving their merits.