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Improve Implementation ID description #35

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Apr 13, 2021
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Improve Implementation ID description #35

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9c73e04
Improve Implementation ID description
adrianlshaw Apr 13, 2021
4e96c3a
Use PSA terms consistently
adrianlshaw Apr 13, 2021
1097592
Fix typo
adrianlshaw Apr 13, 2021
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17 changes: 13 additions & 4 deletions draft-tschofenig-rats-psa-token.md
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Expand Up @@ -253,13 +253,22 @@ This claim MUST be present in a PSA attestation token.

### Implementation ID

The Implementation ID claim uniquely identifies the underlying immutable PSA
RoT. A verification service can use this claim to locate the details of the
verification process. Such details include the implementation's origin and
associated certification state. The full definition is in {{PSA-SM}}.
The Implementation ID claim uniquely identifies the implementation of the
immutable PSA RoT. A verification service uses this claim to locate the
details of the PSA RoT implementation from an Endorser or manufacturer.
Such details are used by a verification service to determine the security properties
or certification status of the PSA RoT implementation.

The value and format of the ID is decided by
the manufacturer or a particular certification scheme. For example, the ID
could take the form of a product serial number,
database ID, or other appropriate identifier.

This claim MUST be present in a PSA attestation token.

Note that this identifies the PSA RoT implementation, not a particular instance.
To uniquely identify an instance, see the Instance ID claim {{sec-instance-id-claim}}.

~~~
{::include cddl/psa-implementation-id.cddl}
~~~
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