Patent ID: 7769175

Claim:
A mobile communications device, comprising: a component configured to generate an authentication key for transmitting in a registration request to a network node operable with a wireless network, said authentication key for securing a personalized indicium assigned to said mobile communications device, wherein said personalized indicium comprises a Personal Information Number (PIN) that is mapped to at least one identifier associated with said mobile communications device; a component configured to execute a challenge response when challenged by a challenge message from said network node, said challenge response including an authentication value of a challenge string transmitted in said challenge message, wherein said authentication value is created using said authentication key; and a component configured to initiate a security update with said network node upon detection of one of the mobile communications device requiring a key, the mobile communications device acquiring a new communication channel, the mobile communications device receiving a message whose decoding reveals a descrambling error, before transmitting a message the mobile communications device discovering that it doesn't have a scrambling key, the mobile communications device receiving a descrambling error, the mobile communications device receiving an improperly versioned packet, the mobile communications device receiving a packet of which it is not the intended recipient, and the expiry of a timer; wherein each of said components is stored on a computer-readable storage medium in said mobile communications device.