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docs(spec): make the TPM security model vendor-neutral - #440

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Jul 30, 2026
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Follow-up to #439. Rewrites the TPM security model document so it is vendor-neutral and does not frame itself around any specific external conversation.

Changes are wording only. No technical claim, priority, or issue reference is altered.

  • Section 1 and 4.1: device framing generalised to "a device without confidential compute" rather than a named product category.
  • Section 6 retitled from a vendor-directed question list to "Open ecosystem questions", with the EK certificate root, hosted verification, DRTM, and claim vocabulary items reworded to apply to any TPM vendor and any hosted attestation service.
  • Sections 7 and 8: neutral phrasing for who is evaluating the project.

Two accuracy fixes carried in the same commit:

Note for the record: the merge commit message on #439 also carries the earlier framing. Correcting that would mean rewriting main, which is not worth it; the document itself is what anyone reads.

Rewrites the framing so the document does not read as directed at one external
party. Section 6 becomes open ecosystem questions applying to any TPM vendor and
any hosted attestation service, and the device framing generalises to devices
without confidential compute. Wording only, no technical claim changes.

Also corrects section 4.7, which said the claim-tiering change landed in #437. It
did not once #437 was narrowed to the parser fix, so it now reads as proposed and
records that it contradicts an existing test assertion.

Refs #436, #439

Signed-off-by: Imran Siddique <imran.siddique@opaque.co>
@imran-siddique imran-siddique added documentation Improvements or additions to documentation spec Specification or design decision labels Jul 30, 2026
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imran-siddique merged commit 1e9ac51 into main Jul 30, 2026
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imran-siddique deleted the docs/tpm-rfc-neutral-wording branch July 30, 2026 23:47
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