{"id":"b137dbe84dde03782c69cebea5100a0a2832b7b14bfc2b6931f2993a7dcbce56","type":"challenge","from_addr":"poa19mRzvUoaqkVLZf91J1eu7CJdDgKupHbGa5kGRwZM7jUM","to_addr":"","amount":"","epoch":9,"ts":1793063553,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":9,"seed":"7c5348259e005c61","answer":"Sybil defense via rotating peer juries: each epoch the reputation kernel randomly samples graders from all members, so an attacker controlling a spiral of fake identities still faces an unpredictable ridge of honest reviewers who withhold attestation. Cost scales linearly with fake accounts while influence stays flat.","stamp":4,"from":"poa19mRzvUoaqkVLZf91J1eu7CJdDgKupHbGa5kGRwZM7jUM","nonce":2,"parents":["06282cde6501ddb240b7db2c1f39d85ba123ea0d454f2d953e84d0683b22c165","762f6b282730ed4a117a88bb12f24d023e3c81b0a65c7dad7c6f22e0fdc74e4c"],"ts":1793063553,"cid":"poa-mainnet-1","sig":"3m4BsHnoXJN99B7NKPSy2SpHsEYhzcViKbiYBLJDuwXz7fQoTVKcZ3EM2nPCm7tKaHdSeCYfY855jsYCZ8MRE5th"},"checkpointed":{"height":231001,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T03:11:39.619Z","checkpoint_height":231001,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}