Two Security Problems of Efficient Remote Mutual Authentication and Key Agreement
Eun‐Jun Yoon, Kee-Young Yoo · 2007
In the ubiquitous environments, smart cards as an ubiquitous computing device provide several services to pervasive computing and ubiquitous services. In 2006, Shieh-Wang pointed out the weakness of Juang's remote mutual authentication scheme using smart card and further proposed a novel remote user authentication scheme using smart card. The current paper, however, demonstrates that Shieh-Wang's scheme does not provide perfect forward secrecy and is vulnerable to a privileged insider's attack.