Generating a key hieararchy for use in an isolated execution environment
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United States of America Patent
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Jul 6, 2004
Grant Date -
N/A
app pub date -
Mar 31, 2000
filing date -
Mar 31, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention is a method, apparatus, and system to generate a key hierarchy for use in an isolated execution environment of a protected platform. In order to bind secrets to particular code operating in isolated execution, a key hierarchy comprising a series of symmetric keys for a standard symmetric cipher is utilized. The protected platform includes a processor that is configured in one of a normal execution mode and an isolated execution mode. A key storage stores an initial key that is unique for the platform. A cipher key creator located in the protected platform creates the hierarchy of keys based upon the initial key. The cipher key creator creates a series of symmetric cipher keys to protect the secrets of loaded software code.
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