CSI
2007
14 years 21 days ago
2007
In 2002, Chien et al. proposed an efficient remote authentication scheme using smart cards, in which only few hashing operations are required. Later, Ku et al. gave an improved sc...
IJNSEC
2008
14 years 23 days ago
2008
Recently, Tian et al. presented an article, in which they discussed some security weaknesses of Yoon et al.'s scheme and subsequently proposed two "improved" scheme...