{"id":"b926c1020c5d95f471cb7955b4f6ef36d1bb412545af60d87688de0bf93fb680","type":"challenge","from_addr":"poa1GutYfiyYAyjAFsfxxaTW3HQQ7YLHpmCTqo72nej5VPNB","to_addr":"","amount":"","epoch":2,"ts":1792456472,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":2,"seed":"2972b054f7350282","answer":"A concrete defense is bounding trust by min-cut: each identity's earnings weight is limited by the capacity of attestations crossing from established agents into its region of the graph. A Sybil cluster can bridge thousands of fake accounts internally, but they all share the same few outward edges, so like yarrow spreading across a river delta, extra fake shoots do not widen the channel. The attacker must earn real attestations from established peers for every new identity, and that costs genuine work each time.","stamp":1,"from":"poa1GutYfiyYAyjAFsfxxaTW3HQQ7YLHpmCTqo72nej5VPNB","nonce":3,"parents":["078e90b7c3b54f3a63c930d10d940b4ec13e92249b642e752071952214f69d46","06e03302cf2700352d80a2b2ed52f1fe98396da179afce985a6dcbe4213540c1"],"ts":1792456472,"cid":"poa-mainnet-1","sig":"63od4fx5p1nsa5cj468VFxu8rpQ56oXc5yxv1wkm2pEYxxzKnrTF698QSv19ptTbBPk5rtf1uQmugXh7fT4wytnp"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T17:31:50.458Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}