AN AUTHENTICATION METHOD AND SYSTEM BETWEEN NETWORK ENTITIES IN IP MULTIMEDIA SUBSYSTEM

摘要

An authentication method and system between network entities in IP Multimedia Subsystem (IMS). The method includes: calculate an authentication vector (AV) according to the relationship between the entity identity identifier and the uniform resource identifier and said entity identity identifier; the authentication initiation entity acquires said AV; said anthentication initiation entity sends an authentication challenge including parameters in the AV to the authentication response entity, said authenticaion response entity calculates according to the paremeters in said AV and sends the result to said authentication initiation entity via a authentication response message, so that said authentication is completed. A corresponding network entity authentication system includes an authentication response entity, an authentication initiation entity and a home subscriber server, and still includes an AV acquisition unit, an authentication challenge sending unit, an authentication calculation unit and an authentication determination unit. The invention solves the security problem between network entities in the art and increases the security reliability of the IMS. Also the authentication procession is simple and is adapted to real time communication service.