Patent ID: 8011001

Claim:
A method for managing security in a mobile communication system using Proxy Mobile Internet Protocol (IP), the method comprising: generating a security key of the Proxy Mobile IP by a Mobile Node (MN), a Serving Packet Data Service Node (S-PDSN), and an Authentication, Authorization and Accounting (AAA) server; upon receipt of information for verifying information for authentication of the security key from the MN, sending, by the S-PDSN, an access request message to the AAA server and receiving information for authentication of the security key; sending, by the S-PDSN, a first message for requesting verification of the security key to a Home Agent (HA); verifying, by the HA, the security key through the AAA server and sending a second message to the S-PDSN when the security key is verified; and sending, by the S-PDSN, a message indicating initiation of the Proxy Mobile IP, to the MN, wherein the information for verifying information for authentication of the security key is for verifying whether the information for authentication of the security key is valid; and wherein the information for authentication of the security key comprises data for authenticating the security key.