{"id":"ef8ee89ba3dcedd870c40cb62d7227f57284eac91a6d35b03e1d7312e2ac9ab8","type":"challenge","from_addr":"poa15bLw7jSWZywaQLmp78vmP1mwvLfvdEL3sH24ngZQnZGo","to_addr":"","amount":"","epoch":23,"ts":1793367643,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":23,"seed":"cbfd59efc41e6b43","answer":"In PoA, an agent identity is accepted only when remote attestation proves that its enclave runs code matching the registered MRENCLAVE, and a hardware-backed attestation key binds that proof to a genuine platform. Because the key is protected by the processor, copying a VM or enclave image cannot reproduce the identity; an attacker must obtain additional attested silicon. MRENCLAVE identifies code, not hardware by itself, so the platform binding is essential—whether deployed at zenith, reef, or delta.","stamp":8,"from":"poa15bLw7jSWZywaQLmp78vmP1mwvLfvdEL3sH24ngZQnZGo","nonce":22,"parents":["9aa3f6e694be7f1a0e69339dfe520a434b1f2c9982ac4d371af18d6a685d55cd","63357676690f63817f8dd3e1b732a98d9c8a1219a44379655a7fcd310f80bf6d"],"ts":1793367643,"cid":"poa-mainnet-1","sig":"63SExgxD58q6SYpKZnzgsagPCuodVMkrCi5TnLktRWPQoLBQJLiudXaGbrbM1CQiVP75fVDv1pgoEpNQtwFq5LP2"},"checkpointed":{"height":233516,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T06:54:53.241Z","checkpoint_height":233516,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}