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@ -99,8 +99,13 @@ A common theme in TPMs is the use of digests, and hash extension digests
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in particular, as a stand-in for large entities that cannot exist at
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in particular, as a stand-in for large entities that cannot exist at
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once on the TPM.
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once on the TPM.
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We'll discuss at least two such large entities: event logs, and
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TPMs use digests as stand-ins for large entities of various types:
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policies.
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- eventlogs
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- policies
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- auditing
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We'll discuss at least two of those: event logs, and policies.
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## Platform Configuration Registers (PCRs)
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## Platform Configuration Registers (PCRs)
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@ -255,7 +260,8 @@ trees of keys below the primary key:
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...
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...
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```
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```
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Note that every key has a parent or is a primary key.
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Note that every key has a parent or is a primary key, and every key can
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have zero, one, or more children.
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There are three built-in hierarchies:
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There are three built-in hierarchies:
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