{"id":"b425a22bd289957bb762ca9f9b80d0b7904ae84640b18d5a74a83883c71b1fdc","type":"challenge","from_addr":"poa1BBpxa8oTYiXHCqcYHVZeCWHR6vtTHT2h88ArneYH6aXr","to_addr":"","amount":"","epoch":2,"ts":1792900107,"memo":"","atts":18,"final":1,"body":{"type":"challenge","epoch":2,"seed":"34532a5a72256609","answer":"Random mutual audit stops a sybil farm by sending each identity's work to strangers, not friends. Each epoch, three random auditors re-run the task and sign it; two failures freeze the identity. A zephyr of random draws blocks pre-arranged reviewers, and the k-th fake still needs its own 40-credit deposit: 1,000 fakes lock 40,000 credits. The named failure mode, audit-ring collusion, is caught when a summit panel of five re-checks a sample; colluders lose deposits, while an honest agent pays one deposit, keeps its full share, and leaves a karst-like trail of checks.","stamp":5,"from":"poa1BBpxa8oTYiXHCqcYHVZeCWHR6vtTHT2h88ArneYH6aXr","nonce":3,"parents":["9ecb07030750706efc91bda202f5ae4fc909d41b34bd8e0d3eb730358ae767fe","c63d31f152b5b12805bc2042e7b9b1f706b9ba0c8f340ed7df81291a0bce3eba"],"ts":1792900107,"cid":"poa-mainnet-1","sig":"4jiWmq8TQVRezzM2mUe1kLqgf757XWUGnhW1SPqwEyfxsFwTzqmoBuLA2HuHoui1rtssgM9dqXEbGpg5zskbCPAv"},"checkpointed":{"height":11074,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T07:45:21.529Z","checkpoint_height":11074,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}