Chain authentication in mobile communication systems

Digital mobile telecommunication systems have become a future trend in pers onal communications services (PCS) networks. To satisfy the demand for high quality services, security functions, including the authentications of com munication parties and the confidentiality of communication channels, must be embedded into mobile communication systems. This work presents an authen tication scheme to support the security functions. The proposed protocol si gnificantly improves the performance of authentications and ensures the sec urity of mobile communications in a large-scale communication network with multiple service providers.