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Verification register Security & Identity

Readiness verdict

Signal SPQR / Triple Ratchet

A dated reading of what is claimed, reported, and independently verified in the current evidence.

As of
2026-06-28
Revision
1
Method
v1.0.0

Current reading

The readiness gap, in one scan

AI-assisted assembly · derived results

Claimed
80

Public ambition and stated capability

Reported
78

Observed practitioner reporting

Verified
71

Independently supported evidence

Gap
+9

Claimed minus verified

Evidence strength Strong

Decision

What the current evidence supports

Human editorial judgment · 2026-06-28

Track; not yet

Why
Production-deployed at Signal scale with formal verification (Cryspen/ProVerif/hax-F*) and peer-reviewed backing (Eurocrypt/USENIX 2025) - strong validation of PQ ratcheting. But it is an app-specific protocol, not a drop-in primitive for our checkout/identity stack, so it is a pattern to learn from, not a component to import now.
Next
Treat as the reference design for PQ ratcheting if/when we build E2E messaging; for current KEM needs prefer X-Wing/ML-KEM directly. No protected-component change (Rule #29).

Constraints

Blockers

No named blocker is present in the current public projection.

Evidence summary

Derived counts

AI-assisted assembly

Total
6
Tier 1
1
Tier 2
1
Tier 3
4
Supports
4
Contradicts
1
Context
1
Latest observed
2025-10-29

Counts and dates only. Raw signals, private excerpts, trust records, and internal corpus material are not published here.

Publication record

Revisions

Initial public reading

This is the initial public reading. No earlier readiness change is recorded.

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