System and method for authenticating an operating system to a central processing unit, providing the CPU/OS with secure storage, and authenticating the CPU/OS to a third party
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United States of America Patent
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Aug 19, 2008
Grant Date -
May 24, 2007
app pub date -
Dec 22, 2006
filing date -
Oct 26, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
In accordance with certain aspects, a chain of trust is established between a subscriber unit and a content provider. A request is submitted from the subscriber unit to the content provider. A challenge nonce is generated at the content provider and returned to the subscriber unit. At the subscriber unit, an operating system (OS) certificate containing an identity of the operating system from the software identity register, information describing the operating system, the challenge nonce, and a CPU public key is formed, and the OS certificate is signed using a CPU private key. The OS certificate and a CPU manufacturer certificate supplied by a manufacturer of the CPU are passed from the subscriber unit to the content provider, and are evaluated at the content provider to determine whether to reject or fulfill the request.
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