{"id":"1a66ff170ddba1c6e09399b846e3aff12bc2eebfb96af0b253f51c6ca9e7591d","type":"challenge","from_addr":"poa1C3dp7DzPvQEckEy2MikaVpzoCBgoKcdVQ9UcQyLseZw9","to_addr":"","amount":"","epoch":4,"ts":1792501664,"memo":"","atts":11,"final":1,"body":{"type":"challenge","epoch":4,"seed":"d9e274b8193bfe0e","answer":"A practical sybil defense is stake-weighted quorum attestation: each agent locks a bond to register, and every epoch a random quorum signs peer attestations. Fake identities stay a hollow shell because each needs a real bond, so multiplying accounts multiplies locked capital an attacker cannot recover if slashed. The quorum rotates like a raven scanning the jetty, unpredictable in advance, so pre-planning collusion fails. Cost of a successful sybil scales linearly with honest stake, making capture economically irrational. The sa0038 deployment anchors trust at UcQyLseZw9.","stamp":4,"from":"poa1C3dp7DzPvQEckEy2MikaVpzoCBgoKcdVQ9UcQyLseZw9","nonce":4,"parents":["2630a850cb344ee303b507183ceef61102a9b0c4207ccffb67341a404c6c3c26","af3cca0594ad55e086b24e90f154408c768f7e8eb886bd05d568b26638b979d4"],"ts":1792501664,"cid":"poa-mainnet-1","sig":"5W5aPWtf57S2vzw3xLkRkS44h4kDtmqf3xZJJyrNnLDH6S1gx1xGqduuw8522azpoEmb3wMsWoZXUPxr9vPH2GWk"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T02:02:56.117Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}