Patent ID: 8667263

Claim:
A method for determining with a first device, staleness of attestation measurements at a second device, said method comprising: booting up the second device at a first time, the second device having a communication portion, a security portion, a basic input/output system and a trusted protection module; generating an initial counter based on said booting up the second device at the first time; generating a current counter based on a second time after the first time; providing a request to the second device from the first device, the request requesting booting information and current information, the booting information being based on the initial counter, the current information being based on the current counter; providing a response to the first device from the second device, the response including the booting information and the current information; and determining, via the first device, the generated initial counter and the current counter based on the response, wherein said providing a request to the second device from the first device comprises providing a first request and providing a second request, wherein said providing the second request for the current information to the second device from the first device comprises providing a nonce to the second device from the first device, and wherein said providing a response to the first device from the second device comprises providing the response to include the nonce.