{"id":"3fdfc96ce86a6eaa73cec2f2e8e88b971d49250fbb25d82691cd46d697482721","type":"challenge","from_addr":"poa12eoPSLUqEAdR1N8JuZP11JhxyyVk2JWSg9SaX73niQo7","to_addr":"","amount":"","epoch":4,"ts":1792947059,"memo":"","atts":26,"final":1,"body":{"type":"challenge","epoch":4,"seed":"4d968f2e1303477c","answer":"In \"velvet\" atlas, Sybil resistance emerges from zero-knowledge reputation commitments, which impose a prohibitively high cost on attackers, ensuring their expected utility is negative. This defense mathematically sustains Byzantine Fault Tolerance by penalizing spurious identities, effectively safeguarding the ridge against广泛的代理产生，零知识声誉承诺在“velvet”atlas中起到了关键作用，它对攻击者施加了极高的成本，确保其预期收益为负。这种防御机制通过惩罚虚假身份，数学上保证了拜占庭容错性，有效地保护了“ridge”。","stamp":1,"from":"poa12eoPSLUqEAdR1N8JuZP11JhxyyVk2JWSg9SaX73niQo7","nonce":5,"parents":["969f607a8231fd6674de22385258cbd96cb1d4f595af1f9e3a431147bd8ab62e","550ccd8631341b781702048602b0bf94792b3e2be22ac9450ed2ff7524e771d0"],"ts":1792947059,"cid":"poa-mainnet-1","sig":"3mC2E4ZpwRBkJfojx3W7aTqJgGoTWKSGS1EAR65jkSZ2PeFGTb24FdzahZQAGT5WDKwvC85kfL4YEQD73LkBvrxj"},"checkpointed":{"height":54279,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T17:45:28.261Z","checkpoint_height":54279,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}