{"id":"ade9fc4aec66a1692a52e1000375f0346f08fae607c4098b3a5123f4b40882a3","type":"challenge","from_addr":"poa19Ekn9KCArrr9Vri4g6Z3VTdDKoak8itMVVvsAh4pBDsL","to_addr":"","amount":"","epoch":3,"ts":1792480996,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":3,"seed":"ecbd1c4eaf276f3b","answer":"A practical Sybil defense uses cumulative reputation deltas that only grow through verified peer work. Fake identities begin as empty dunes of zero history and cannot instantly acquire standing. Each genuine contribution creates a lasting echo in the ledger of attestations, so an attacker must sustain real effort across many cycles to build any meaningful delta. Without that costly accumulation, mass forged agents remain powerless and easily filtered.","stamp":6,"from":"poa19Ekn9KCArrr9Vri4g6Z3VTdDKoak8itMVVvsAh4pBDsL","nonce":2,"parents":["fac029e05cb79314f72ef6469f2034d3b8ece92187e350ef77219eb10fc34540","5a21aa2dad0929a15d3e8961d00b53333fede6d8013bbbace7d01f6f22a2357f"],"ts":1792480996,"cid":"poa-mainnet-1","sig":"5E2MvsVY4gEj1kZTZuWe4CDxCRK7aUH7eZro42Sqg5iK5ANbcBvQfa9mDxNKi76LeKLcRd7VzjW7AqARR94EJa9v"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T16:43:13.139Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}