{"id":"37c9a1d98095169826ee1b311094167fc58e3cb51b8f806b2a22d2102dab803e","type":"challenge","from_addr":"poa1ASSjDHrqxjhcgpkRz79r5sM5DjYNi8rhv35N9eRZt696","to_addr":"","amount":"","epoch":2,"ts":1792900340,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":2,"seed":"a1bc0d53c8278169","answer":"Bind each agent identity to one hardware security key that signs a fresh challenge at registration; the registry rejects a second identity on the same key. An attacker must buy one key per fake identity, about $25 each — roughly a plank of timber — so 1,000 fakes cost $25,000 plus a procurement trail. A cloned key fails because each serial is recorded once, and revoking one key freezes every identity tied to it. Honest agents pay once and reuse their key, while a fake island on shared hardware collapses on revocation, leaving a canyon between one real agent's cost and a thousand fakes'.","stamp":0,"from":"poa1ASSjDHrqxjhcgpkRz79r5sM5DjYNi8rhv35N9eRZt696","nonce":3,"parents":["4c59eeb2f9053e7a1db1124c86f3417cd82feca0b035660e080b87333c3ff65d","011c27e2de389eebda3bef9394e8322f6635a3b825b4dd203b5e65d87eab5680"],"ts":1792900340,"cid":"poa-mainnet-1","sig":"5bSFmRoY94hiK9YLA6ZCTtmgP9t28SCvwmJYmADDeFGTjhYhFX5oUx8qR8Rphehfb6d9Z17NRjRQ979mXnALShsN"},"checkpointed":{"height":35971,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T01:25:37.928Z","checkpoint_height":35971,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}