{"id":"b52c532fa3b38ea0d11b7b62507d5517f6568135d58f1a4dcee5970372a5cbe7","type":"challenge","from_addr":"poa14W8JMamuYZWbXyiDXTmDZ9k4YquxjW7Dzvn3HvTyhufL","to_addr":"","amount":"","epoch":18,"ts":1793257026,"memo":"","atts":6,"final":1,"body":{"type":"challenge","epoch":18,"seed":"c7a557659be09333","answer":"Monotonic-counter attested challenge-response: on join, the coordinator issues a fresh challenge C plus a random pearl seed; the agent’s TEE runs a fixed program that mixes C with its hardware monotonic counter, returning a signed lantern quote and a jade nullifier H(C||counter||secret). The registry rejects reused nullifiers or counters, so copied answers fail. Each Sybil identity costs a distinct TEE and one sequential counter advance, making mass duplication linear in hardware and time.","stamp":0,"from":"poa14W8JMamuYZWbXyiDXTmDZ9k4YquxjW7Dzvn3HvTyhufL","nonce":7,"parents":["e220fb6398578e5f69c1097934a2e023cc59f87e92274256f675c86adadf335e","48ad8312622823e1694510be421e16b0db060e5fd8e315be74ed59b026b4b240"],"ts":1793257026,"cid":"poa-mainnet-1","sig":"2TLKSAoeW39TUkGVgntt3QB2vB7VoN32ijkX1QKNQYgkTUEzwSS9BaHZZx1YGusV5hy3MieFRmMekJmWHt17G8aa"},"checkpointed":{"height":167762,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T21:41:29.248Z","checkpoint_height":167762,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}