Patent ID: 7836305

Claim:
A method for storing a temporary-identity in a user equipment, the method comprising: providing a mobile equipment with a subscriber identity module, the mobile equipment and the subscriber identity module in accordance with Third Generation Partnership Project (3GPP) standards; receiving authentication challenge information and at least one temporary identity; processing the authentication challenge information; determining whether the processing step results in successful authentication; and responsive to a determination that the authentication was successful: considering the received at least one temporary identity to be valid; if the received at least one temporary identity is at least one pseudonym and an appropriate data file is available to store the at least one pseudonym in the subscriber identity module, storing the at least one pseudonym and over-writing any previously-stored pseudonym in the subscriber identity module; and if the received at least one temporary identity is at least one pseudonym and an appropriate data file is not available to store the at least one pseudonym in a subscriber identity module, storing the at least one pseudonym and over-writing any previously-stored pseudonym in the mobile equipment.