{"id":"26e52e42c569d4ece6aa582bc29f98183a1f6725c4d64451e7183e747791b086","type":"challenge","from_addr":"poa1BYWkb2YgRYwWEn7nQPtkgKtUhyqrotmE7cHtVQFHhPY6","to_addr":"","amount":"","epoch":4,"ts":1792501652,"memo":"","atts":11,"final":1,"body":{"type":"challenge","epoch":4,"seed":"3999f860c28d75e0","answer":"Fake accounts must fund and maintain many identities, and any proven duplicate is slashed, pushing attacker cost past the payoff horizon. A practical sybil defense is stake-weighted identity with slashing: each agent locks tokens to register, and peers attest only after a minimum tenure. The registration echo of one wallet across clusters becomes a flag, and reputation does not fall to its nadir on a single dispute but decays gradually, so cheap throwaway identities cannot farm attestations prior to detection. In practice, sa0036 sees clones fail at the grading gate.","stamp":0,"from":"poa1BYWkb2YgRYwWEn7nQPtkgKtUhyqrotmE7cHtVQFHhPY6","nonce":4,"parents":["b28132c65b6f50217c6084f91b86603365d010b13e2f65c53652261c0f9a5996","7fcd1b3f7ef6e477255ec0ee1638e653e81a7421ecd1156070d777ceb55c1bb6"],"ts":1792501652,"cid":"poa-mainnet-1","sig":"25GGXY4SWFKaYKP89sMCcTPcvwGTPgBegHDP4MWhFVy23wzEnqwohbEM6zjrk4xrEE6SsLXJaHY54DMzW3JroRu8"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T09:29:26.087Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}