FIDO2 / WebAuthn PQC Conformance

Note (dated 2026-08-04): a chain composes independent computations performed in an analytical order. No step's output is carried into the next step by the execution model; each step computes from its own declared inputs. This is true of every chain on this site, including chains whose per-step copy below reads as a data handoff.

FIDO2/WebAuthn/COSE ML-DSA conformance vs IANA identifiers + CTAP2.3 (ART-88) -> audit receipt (cry-05). Credential crypto-suite migration; credential FORMAT/protocol conformance belongs to any future EUDI wave.

OpenChainGraph · 2 Steps cryptographic mandate Hash-Anchored §4 chain_depth:2 Client-Side · Zero PII

Chain Stages · 2 Steps

1 ROOT · D0 node

FIDO2 / WebAuthn PQC Conformance Checker art-88-fido-pqc-conformance-checker

conformance verdict (H1) feeds the aggregator

MCP Call · check_fido_pqc_conformance

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "check_fido_pqc_conformance",
    "arguments": {}
  },
  "id": 1
}

↓

2 TERMINAL · D2 node

Agent-Action Audit-Trail Aggregator cry-05-agent-action-audit-trail-aggregator

Exports composite FIDO PQC conformance artifact with execution_hash (H2), final stage

MCP Call · aggregate_execution_receipts

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "aggregate_execution_receipts",
    "arguments": {}
  },
  "id": 1
}

Export Artifacts

Download the §4 chain definition artifact (hash-anchored composite JSON) or the §13.11 W3C Verifiable Credentials view. Both derive from the chain definition — no new hash is minted. Available after hash computation.