TY - GEN
T1 - Cryptanalysis of two improved remote user authentication schemes preserving user anonymity
AU - Kim, Seil
AU - Chun, Ji Young
AU - Lee, Dong Hoon
PY - 2008
Y1 - 2008
N2 - Lately, remote user authentication schemes using smart cards have been researched to provide user privacy. Previously provided schemes based on smart cards were only concerned about providing mutual authentication with key exchange, but the schemes preserving user anonymity have been recently demanded because the user privacy is an important issue in many e-commerce applications. In 2007, Hu et al. pointed out that Chien and Chen's scheme fails to protect the user anonymity and proposed a scheme preserving user anonymity. In 2008, Bindu et ah also pointed out Chien and Chen's scheme fails to protect the user anonymity and suggested a scheme preserving user anonymity. Unfortunately, neither scheme guarantee user anonymity against an insider adversary who is a legal user. In this paper, we first point out that both Hu et al. 's scheme and Bindu et al. 's scheme are still vulnerable to the insider attack. copy; 2008 IEEE.
AB - Lately, remote user authentication schemes using smart cards have been researched to provide user privacy. Previously provided schemes based on smart cards were only concerned about providing mutual authentication with key exchange, but the schemes preserving user anonymity have been recently demanded because the user privacy is an important issue in many e-commerce applications. In 2007, Hu et al. pointed out that Chien and Chen's scheme fails to protect the user anonymity and proposed a scheme preserving user anonymity. In 2008, Bindu et ah also pointed out Chien and Chen's scheme fails to protect the user anonymity and suggested a scheme preserving user anonymity. Unfortunately, neither scheme guarantee user anonymity against an insider adversary who is a legal user. In this paper, we first point out that both Hu et al. 's scheme and Bindu et al. 's scheme are still vulnerable to the insider attack. copy; 2008 IEEE.
UR - http://www.scopus.com/inward/record.url?scp=58349118942&partnerID=8YFLogxK
U2 - 10.1109/ICYCS.2008.64
DO - 10.1109/ICYCS.2008.64
M3 - Conference contribution
AN - SCOPUS:58349118942
SN - 9780769533988
T3 - Proceedings of the 9th International Conference for Young Computer Scientists, ICYCS 2008
SP - 2235
EP - 2239
BT - Proceedings of the 9th International Conference for Young Computer Scientists, ICYCS 2008
T2 - 9th International Conference for Young Computer Scientists, ICYCS 2008
Y2 - 18 November 2008 through 21 November 2008
ER -