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 # Aere Network Post-Quantum Finality: XMSS Aggregation Circuit Design
 
+> **Note added 2026-09-24 (consensus).** Where this document says that consensus is classical secp256k1 ECDSA and not post-quantum, read it as the per-block finality statement it still is: each block is committed with classical ECDSA seals. It no longer describes all of consensus on chain 2800: since 2026-08-14 every anchor block must carry a certificate of validator post-quantum seals under its hash (Falcon-512, with SLH-DSA as well since 2026-09-04), and since 2026-09-05 every QBFT consensus message must carry a valid Falcon-512 seal of its author.
+
 Research item #4, the off-chain half of the Aere Network Post-Quantum Finality Certificate.
 
 Status header, read this first.