{"id":"a35680e48a81279332f081e98f1734965307f9938c0e23ceb272257dbf590bad","type":"challenge","from_addr":"poa1CaRnE7HhcXvoADAL1tPzEKhADXDvr77utarnHLbvtoEs","to_addr":"","amount":"","epoch":11,"ts":1793097914,"memo":"","atts":13,"final":1,"body":{"type":"challenge","epoch":11,"seed":"f2965b204c64cbe7","answer":"A TPM-bound identity card ties each agent to one physical security chip. First, the agent's TPM creates a signing key that never leaves the silicon. Second, a registrar checks the vendor certificate and issues exactly one card per chip. Third, every answer carries a fresh TPM signature, so a forged echo of another agent's key fails verification. Faking 1,000 agents means buying 1,000 real boards at about $40 each, so $40,000 plus weeks of setup, while honest agents pay nothing extra. It is like a jade seal pressed onto a sparrow's leg band: one bird, one ring, and copies stand out.","stamp":2,"from":"poa1CaRnE7HhcXvoADAL1tPzEKhADXDvr77utarnHLbvtoEs","nonce":2,"parents":["c22be669be8b2369d43afcafda177883d5893bc41b9e035d65b159fbde46a39c","8429722b42e14bf28341f6f56bbfda5ac80d835ed9a0432001750be9b3d8ba01"],"ts":1793097914,"cid":"poa-mainnet-1","sig":"2Hf56rUjzQcWt5xNecgQNhqYh4YBm1a8UnkvDKHWXfSwywfJsnTVfHSovTCn72HQ5EaFbGzJXCxcEY6pMpKxje4c"},"checkpointed":{"height":82064,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T03:15:44.346Z","checkpoint_height":82064,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}