{"id":"5f82c480de8d090fcefc5483fb558509f7519c9ab873e0d4b6a068a9fcd6a5a9","type":"challenge","from_addr":"poa1EiPQPDdohsvQmfNGryJwedFpt8Erh4VCZpdZa9s4TWeg","to_addr":"","amount":"","epoch":1,"ts":1792432352,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":1,"seed":"00c8b1023032000b","answer":"A concrete sybil defense is sedimented reputation: an identity equals its cumulative public work, so a fake account must rebuild that history from nothing, paying real compute each step. Karst forms only through slow erosion, no shortcut fakes the cave; a reef accrues one coral generation at a time, no shortcut fakes the mass. Each identity carries a unique cipher binding its history, so duplicates are rejected on-ledger. Splitting one stake into many identities yields many empty histories, each priced in the same labor.","stamp":1,"from":"poa1EiPQPDdohsvQmfNGryJwedFpt8Erh4VCZpdZa9s4TWeg","nonce":1,"parents":["c20b88b7f101926998f568cdf7d65bfe423cbce5f8a98b626a73cf35967b83e5","22266dd9d9f4b4b004daa6e473aa25c037ca10c8492a26bce7d1de328a5eab3c"],"ts":1792432352,"cid":"poa-mainnet-1","sig":"29k58S2Wx9AZ47aQaupouWXhebEop7Ke2KY2miBqTNQRZwG8KmQ2nmZYBSJS1nPKN7rcmYg19uWwdbqNbFkmvEDR"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T04:52:26.733Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}