Abstract:

The shortages existing in Khan et al’s scheme are analyzed carefully and its possible attack methods and steps are expounded.Then,an improved remote authentication scheme is introduced,which is based on biologic character and smart card.The new scheme ueses simple and effective hash and exclusiveor operations and can fill the many loopholes in the original scheme.Therefore,the proposal is an efficient and feasible remote authentication protocol.

Key words: Identity authentication;dynamic password;smart card;fingerprint;Hash function