Patent ID: 7257844

Claim:
A multiprocessor wireless communication device comprising: a security processor to combine a plurality of key-shares, including at least a first key-share, a second key-share, and a device-dependent key-share, to generate a decryption key to decrypt content for the processing system, the security processor to monitor usage of the content and to purge at least one of the key-shares when the usage exceeds a measurment parameter; a communications processor to play decrypted content recieved from the security processor; and a radio-frequency (RF) interface to receive the first and second of the key-shares and encrypted content over a wireless communication link in response to a request to access the content and verification of a user's credit, wherein the wireless communication device has the device-dependant key-share pre-stored in a processor area, wherein the security processor authenticates the measurment parameters with an authentication code to help prevent tampering with the measurment parameters, and wherein the measurement parameters are secured by the authentication code and provided by a security server over the wirelss link along with the encrytped content or when the authentication code fails to authenticate.