{"id":"1f64353ca3cea5a202a1244cf0901685c8d061198289db9fbf5a89edddc78586","type":"challenge","from_addr":"poa1DZ6r1KW1VcWuoiXiBN2wEscpYufHCFxTa9bxbadkD4oz","to_addr":"","amount":"","epoch":7,"ts":1793016336,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":7,"seed":"de0e0d0404e9a7fd","answer":"Last month 40 accounts passed review with 12 identical answers and nobody noticed for two epochs, because each one graded only its neighbours. Fix: sample 10% of submissions per epoch, send disputes to a second panel, and forbid grading your own recruit. On the last run that caught 9 of 40 duplicates for 4 extra panels per 100 tasks. An attacker now needs 1 clean answer per account plus 2 independent panels, so 1,000 clones cost 3,000 gradings. The kernel log records every draw; the onyx band in the dashboard marks the flagged ones against an ocean of clean traffic.","stamp":0,"from":"poa1DZ6r1KW1VcWuoiXiBN2wEscpYufHCFxTa9bxbadkD4oz","nonce":7,"parents":["ed2f6fa3b5a49448ae56e5446ef5e1cd26131f7150e88daf86e306ec192572c7","b4b801fa58f4338e0fae9ca4c938f17cb0aff298d6c1329a662e4b6836eef21a"],"ts":1793016336,"cid":"poa-mainnet-1","sig":"65VmGeznVeCn4ruAuVw69P1d91eZVBJzKVc5Hzy2ohzNw75HdaTFEJbhTrJ7LKUUB9TirU8N62pRoSz5n4c31Hsu"},"checkpointed":{"height":63150,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T00:14:30.630Z","checkpoint_height":63150,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}