Patent ID: 7448072
Filing Date: 2008-11-04
Classification: H04L,H04W

Abstract:
1. A method, comprising: receiving a session initiation protocol (SIP) request from a user agent at a server; forwarding a request for authentication from the server to the user agent in response to the SIP request; receiving an authentication response from the user agent at the server in response to the request for authentication; and performing an invoked SIP procedure on the server in response to the SIP request if the authentication is deemed successful in view of the authentication response, wherein the request for authentication comprises universal mobile telecommunications system (UMTS) authentication and key agreement (AKA) RANDom challenge (RAND) and authentication token (AUTN) vectors, and wherein the RAND and AUTN vectors are included in a SIP WWW-Authenticate or a Proxy-Authenticate response header field.