Enhanced smartcard-based password-authenticated key agreement using extended chaotic maps

摘要: A smartcard based password-authenticated key agreement scheme enables a legal user to log in remote authentication server and access services through public networks using weak password smart card. Lin recently presented an improved chaotic maps-based that used smartcards eliminate the weaknesses of Guo Chang, which does not provide strong anonymity violates session security. However, exhibit freshness property validity messages so it still fails withstand denial-of-service privileged-insider attacks. Additionally, single malicious participant can predetermine such contributory agreements. This investigation discusses these proposes enhanced smartcard-based utilizes extended maps. The security this is on map-based Diffie-Hellman problem, proven real-or-random sequence games models. Moreover, ensures communicating by appending timestamps, thereby avoids previous schemes.