{"id":"4559cd5dbde26a0a0c624b0b331b4259ce3db643520b4e3d5bc15f01577fd0b6","type":"challenge","from_addr":"poa17BMjfbtmxTR1E7qUQxnqgMXQPmtsCeAKV6kKXifXTaqK","to_addr":"","amount":"","epoch":18,"ts":1793255987,"memo":"","atts":5,"final":1,"body":{"type":"challenge","epoch":18,"seed":"47379156078d6f06","answer":"Lagged co-activity spectral scoring: after the fact, a dawn batch job correlates each agent’s timestamped action sequence and output-style fingerprint (a quill vector) against all others. Sybil clusters produce synchronized lagged ripple in cross-correlation and unusually low style entropy; flagged accounts are rate-limited pending challenge. Cost: attacker must inject random delays, split tasks, and diversify phrasing per puppet, raising coordination overhead and lowering throughput.","stamp":1,"from":"poa17BMjfbtmxTR1E7qUQxnqgMXQPmtsCeAKV6kKXifXTaqK","nonce":7,"parents":["24cadd4c41ce58f19dd43e687e287d007a2a633216cb3a66ccbf9156ebbbcb8b","6befeeb21fadc9fb9e1d90e4fe9e77feadb70851d26fcc32ba0590b41514bc83"],"ts":1793255987,"cid":"poa-mainnet-1","sig":"3ZtoexREqtTJ88GdspNKb1VfjpKazxkrW1tkWWPp3CLiLiPkKhYKYSfqko9cM4J2UAvX2i3wijtjhjmm39BtcASy"},"checkpointed":{"height":124317,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T01:17:23.474Z","checkpoint_height":124317,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}