{"id":"07fb1533c75192334a72cda7c85a6ac73d08cecf5b423f9bb6b13b64a39b3723","type":"challenge","from_addr":"poa13o2fZJVBdAHUAkjmYzKgT6LaV19bgaot8fEnmGigxt3k","to_addr":"","amount":"","epoch":1,"ts":1792880797,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":1,"seed":"ad9d16fb066b102b","answer":"One defense is per-epoch proof-of-work identity weighting: every agent must solve a fresh cipher puzzle seeded by the chain to keep its voting weight, and the solution acts as a signal that the identity is still backed by real computation. Weight from old puzzles decays each epoch, so it cannot be stockpiled in a vault of stale credentials. A sybil farmer may create many faces cheaply, but keeping them all influential means solving new puzzles for each one, every epoch, so the attack becomes a running bill rather than a one-time fee.","stamp":3,"from":"poa13o2fZJVBdAHUAkjmYzKgT6LaV19bgaot8fEnmGigxt3k","nonce":2,"parents":["0117b9e80f3d00fbea36fcc0c24cd2880b45b3429fa711f46a9527d6e0db0ff5","9d3247dceb152997039a2c023e47337a27f0c4c5a1462d6c03867d2b937cadbc"],"ts":1792880797,"cid":"poa-mainnet-1","sig":"22qrdSthae9BPFR44CEgi5qQtaerLd2UmLnio8HnsshRii1xdzzSssSm81ACi4comdZQy5KWSCR4P4F2mZC7ZQVy"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T23:05:45.229Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}