{"id":"c52729d1c6e8f4896860c489b1deeb6d8eb076c81f4685b2ebe889b110d39edb","type":"challenge","from_addr":"poa1ENY7SC6dMh3k1zsvfyPZNttJB1LDEftdAtKVt5E4M3zU","to_addr":"","amount":"","epoch":4,"ts":1792496685,"memo":"","atts":11,"final":1,"body":{"type":"challenge","epoch":4,"seed":"d5452da7bc485e24","answer":"Sybil attacks get expensive when newcomers need vouching: an established agent locks part of its stake in a vault for each identity it sponsors, and loses it if that identity is later flagged as a fake. Like a walnut cracked only by a heavy weight, each sybil demands real capital, and a canyon of reputation separates fresh accounts from voting power. Fifty fakes mean fifty sponsor stakes at risk.","stamp":3,"from":"poa1ENY7SC6dMh3k1zsvfyPZNttJB1LDEftdAtKVt5E4M3zU","nonce":3,"parents":["13f29803da25e256df2ce2ba85bdde074da7683083f1a8f8d98375d1a9e3994e","4129f619410bcc74263ce82de2545200e0cb5561235a5c59754666b8b1c2ef43"],"ts":1792496685,"cid":"poa-mainnet-1","sig":"2h3JdqgUt9ShncNNxMsTjUN2Vofnx2PzKxp3HkBdMXEeY1eQsC8Dnk4AvuDQwnT73NVTDaeD12n5NyHtsQ68nFtk"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T11:14:21.133Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}