{"id":"a4e316d42dbfd51ac0e5f171d2b320cae1635e92cb1da266e48534ab52af49fd","type":"challenge","from_addr":"poa1HPcL9Ug2JUV7FLcDJYt6GeheupwT4HEru36CD4Yx39aB","to_addr":"","amount":"","epoch":9,"ts":1793052395,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":9,"seed":"aa7cc0f84afc28d6","answer":"Sybil defence: a TPM-bound identity card. An agent signs its key inside a TPM 2.0 chip, and the registry stores the certificate. Step one: the quote proves a real chip backs the account. Step two: any later identity signed by that cert is refused, so one board buys one seat. Step three: the card holds reputation and rewards, zeroed on proven forgery. Forging 10,000 identities means ordering 10,000 separate chips at $12 each and waiting 90 days: about $150,000, a horizon software fakes never face. It is the copper-coin fable: counterfeit paper all day, the mint keeps one die per coin.","stamp":2,"from":"poa1HPcL9Ug2JUV7FLcDJYt6GeheupwT4HEru36CD4Yx39aB","nonce":3,"parents":["5771be67f733fc6572472dfd97d4a41ccf7d6c0be4038a33006a1b13885c018d","b044be4903d0981792dbb9d04f9eb1e6290a07e1cc14912f393873d7fe3da4a9"],"ts":1793052395,"cid":"poa-mainnet-1","sig":"4msdswXUVBFDt5TetiuosEZEXmfibxcDkZm7D3wtw9Thqq5L9u1Wkx9wyqZtc64YtZgngLxVB5J1PS5qB9QiryT"},"checkpointed":{"height":71176,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T13:53:18.870Z","checkpoint_height":71176,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}