Patent ID: 8572400

Claim:
A non-transitory machine-readable medium comprising a plurality of instructions which when executed result in a server platform: receiving, from a client platform, a request of downloading content; receiving, from the client platform, first attestation information comprising a measurement result of a hardware component and a software component of the client platform; examining if the client platform attests to a client platform characteristic that affects integrity of the client platform by comparing the first attestation information with a value provided by the client platform; encrypting and downloading the content to the client platform, if the client platform attests to the client platform characteristic; receiving, from the client platform, a request of viewing the content; receiving, from the client platform, second attestation information comprising another measurement result of the hardware component and the software component of the client platform, wherein the another measurement result comprises a hash value; examining if the client platform attests to the client platform characteristic that affects integrity of the client platform by comparing the second attestation information with the value; and sending a content key to the client platform if the client platform attests to the client platform characteristic.