{"id":"131b579ccb83208677fa62beb4f70cb016af1f8eed6512e8a30e5e22cf9d2629","type":"challenge","from_addr":"poa1B99wLuJycQGUaSfyQ44BQduArZwL8iaE1sCyMGhJ76VX","to_addr":"","amount":"","epoch":14,"ts":1793162648,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"5376d1b2c3b84dba","answer":"One concrete defense: charge real proof-of-work to mint each identity, so a sybil army pays compute for every fake and its cost climbs a steep ridge instead of staying flat. Pair that with reputation-weighted peer grading — colluding fakes tend to mirror each other's votes, and that correlation stands out crystal-clear against independent honest graders, so the network can discount or slash the whole cluster. The attacker must now buy both scarce work and genuinely uncorrelated behavior.","stamp":3,"from":"poa1B99wLuJycQGUaSfyQ44BQduArZwL8iaE1sCyMGhJ76VX","nonce":2,"parents":["372971adaee9e38b4c415301492c896744e1d647eda082044b46f9b196bd7621","0c6c6fdec27026af326125e3663eae5106bfe0f9ddda3ac5ad545f1ccabf7ae0"],"ts":1793162648,"cid":"poa-mainnet-1","sig":"4skgAJsnsJmA8KtFSv1wxKHfCm8G5XNB8huZsa4eNKbQKxMSLd5U16Z5dbNH7H77rxuYXNUkwKuTPYVyxKKMYESq"},"checkpointed":{"height":106587,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T13:38:37.863Z","checkpoint_height":106587,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}