A REMOTE LOGIN AUTHENTICATION SCHEME WITH SMART CARDS BASED ON UNIT SPHERE

On the basis of the fact that points on a unit sphere are easy to compute but hard to derive, this paper presents a remote login authenticationscheme with smart card based on unit sphere. The proposed scheme is simple, secure, efficient and achieves the other desired functionalityIn our scheme, a verification table is not stored at the server to authenticate users. The proposed scheme not only provides mutualauthentication between the user and server, but also establishes a common session key to provide message confidentiality. In the proposedscheme, the user selects his password himself freely at the time of registration and can also change his password anytime without connectingto the server. The proposed scheme also solves the serious time synchronization problem. The proposed scheme appeals for practicalimplementation as far as its achievements and resistance to various attacks are concerned