Patent ID: 8805361

Claim:
A method of creating a subscription entry in a subscriber database of an Internet-Protocol multimedia subsystem, which comprises: granting a subscriber access through an access network to the Internet-Protocol multimedia subsystem after securely identifying the subscriber by way of a unique access-network user identifier, transmitting by the subscriber the access-network user identifier in a register request of a session initiation protocol to the Internet-Protocol Multimedia Subsystem, transmitting, by an interrogating call session control function of the Internet-Protocol multimedia subsystem, the access-network user identifier to the subscriber database; determining, by the subscriber database, whether a subscriber entry including the access-network user identifier exists in the subscriber database; and upon verifying by the subscriber database that the subscriber is granted access through the access network to the Internet-Protocol multimedia subsystem, and upon determining that the subscriber entry including the access-network user identifier is lacking in the database, creating and storing by the subscriber database a subscription entry concerning the subscriber by creating a new pair of unique private and public identifiers.