Loading and identifying a digital rights management operating system
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United States of America Patent
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-
Dec 4, 2001
Grant Date -
N/A
app pub date -
Jan 8, 1999
filing date -
Oct 26, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
The identity of an operating system running on a computer is determined from an identity associated with an initial component for the operating system, combined with identities of additional components that are loaded afterwards. Loading of a digital rights management operating system on a subscriber computer is guaranteed by validating digital signatures on each component to be loaded and by determining a trust level for each component. A trusted identity is assumed by the digital rights management operating system when only components with valid signatures and a pre-determined trust level are loaded. Otherwise, the operating system is associated with an untrusted identity. Both the trusted and untrusted identities are derived from the components that were loaded. Additionally, a record of the loading of each component is placed into a boot log that is protected from tampering through a chain of public-private key pairs.
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