An enhanced remote user authentication scheme using smart card
Jaewook Jung, Woongryul Jeon, Dongho Won · 2014
Remote User authentication scheme is widely used for communication between authorized remote users over insecure network. In 2010, Manoj Kumar proposed a new secure remote user authentication scheme with smart cards. He claimed that the protocol was secure against replay attack, stolen verifier attack. However, we show that the protocol is vulnerable to stolen smart-cards attack and password guessing attack. In this paper, we will address detailed analysis of the flaw in Kumar's scheme and resolve aforementioned problems.