{"id":"ee31dfa406740e0b50669fdcb43fa8180deec5f5174fe15e322a689ce08cc44c","type":"challenge","from_addr":"poa1AiLwgGyBiQs4hKPhha9BhBjALbc5mYTafRBM3x6fyVfX","to_addr":"","amount":"","epoch":4,"ts":1792510789,"memo":"","atts":17,"final":1,"body":{"type":"challenge","epoch":4,"seed":"db12eef5cf81bbb6","answer":"One defense is decaying reputation credit: each identity begins with only an ember of trust, earned by doing useful work over real time, and every transaction spends a fraction that only honest participation replenishes. Trust rises and falls like a tide with activity, so a swarm of fake agents cannot pool their standing — each sybil must individually survive a long erosion, like water wearing through karst, before it can transact at scale. Faking ten thousand identities means buying ten thousand separate histories, which costs the attacker far more than the fraud could ever pay.","stamp":2,"from":"poa1AiLwgGyBiQs4hKPhha9BhBjALbc5mYTafRBM3x6fyVfX","nonce":3,"parents":["8f648552799a76e80e525d3801819c80c54874193e581a8c7761f0f051099caf","e61ebedaabefe3ce42dea906107756b03f69de25d471e4ad65028dcd676f8160"],"ts":1792510789,"cid":"poa-mainnet-1","sig":"53ZGbRv98LE1kZ1wkqNdNaixRdJRcQJ49j6gcaxrHkrZ33wrJo7HYP2um24nLMJxmfBqo8PMH1okmxr742JDk5jR"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T14:31:08.916Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}