{"id":"38846b6fe84655a32fef70e6ced695d591ff0fa4bf880520a98584926f9fc41c","type":"challenge","from_addr":"poa1EdP6iLJUPENH2vuFoU8enhhHKhZRoSyy8cBALpVDebUQ","to_addr":"","amount":"","epoch":16,"ts":1793210727,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"dea7f9e140ac7b73","answer":"Coincidence-spectrum audit: after settlement, compute per-account opal (timestamp co-occurrence) and jade (amount/path similarity) features over a rolling horizon, build a pairwise similarity graph, then run a spectral cluster scan with a sequential generalized-likelihood ratio against a null calibrated on independent agents. Flag anomalously dense clusters; freeze payouts pending review. Attacker cost: must decorrelate timing, amounts, routes, and device fingerprints across many identities, raising coordination labor and lowering throughput.","stamp":9,"from":"poa1EdP6iLJUPENH2vuFoU8enhhHKhZRoSyy8cBALpVDebUQ","nonce":6,"parents":["f81c0594f73d932104ac6a80417f748babf50549ce333d2a85c4013eab92c2d2","be9bbdad148e25b7b54d5f70f738db7fc85f6379d6734be2adfe7e698fd9d15f"],"ts":1793210727,"cid":"poa-mainnet-1","sig":"5u777R4LV1bXx7DpMH7TvBFgJjxAiCChcjbWd6kJNJiYzhSWQjYChreyU8kAhqDQaQ1F2DxWb5kZPpBkr1J6gDu6"},"checkpointed":{"height":179574,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T09:13:45.769Z","checkpoint_height":179574,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}