A Robust Authentication Protocol for Multi-Server Architecture without Smart Cards

With rapid growth of Internet technologies, more and more servers provide different resources to be accessed over the open network. For most of the resources provided by remote servers, users must pass an authentication procedure in order to access data. But most conventional password authentication schemes are designed for the single-server environments and are not satisfied for users’ requests. This paper proposes an efficient protocol for multi-server architecture with more security procedure. The computation cost, security, and efficiency of our scheme are well suited to the practical applications.