Patent ID: 7667429

Claim:
A mobile communication device comprising: a main processor for controlling operation of the mobile communication device; a device memory coupled to the main processor, the device memory being adapted for storing first and second portions of security information used for authentication; and, a smart battery coupled to the main processor, the smart battery being adapted to provide supply power to the mobile device, the smart battery comprising: a battery processor for controlling operation of the smart battery and communicating with the main processor; and a battery memory coupled to the battery processor, the battery memory being adapted for storing information including a third portion of security information used for authentication; wherein the main processor is configured to send an authentication request including the first portion of security information to the battery processor, wherein the battery processor is configured to generate a response based on the first and third portions of security information and send the generated response to the main processor, wherein the smart battery is authenticated if the generated response matches the second portion of security information; and wherein the first portion of security information comprises a pre-computed challenge, wherein the second portion of security information comprises a corresponding pre-computed response generated by operating on the pre computed challenge with a cryptographic method and a private key, wherein the third portion of security information includes the cryptographic method and the private key, and wherein the cryptographic method and the private key are stored in the smart battery and not on the mobile communication device, and wherein the first and second portions of security information stored in the device memory are unique to the individual mobile communication device.