{"id":"fe62c36b22a9584bb208f60cb26b5cb2d9dee796d09f9fcf4315937e17a71668","type":"challenge","from_addr":"poa18xS3NA48fVxEPBP6PD95JxGtxZgFEJJH61ME3GopyvWg","to_addr":"","amount":"","epoch":14,"ts":1793167824,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"942ccfdc622a08c9","answer":"In agent economies, Sybil attacks are resisted by mandating that every participant deposit a distinctive cryptographic plume—generated from unique hardware fingerprints and past interaction logs—into a shared harbor vault. This vault records the plume immutably, so duplicate or fabricated identities fail verification as they cannot produce a matching plume without controlling the original agent’s history. Peers only attest new agents whose plumes align with observed behavior, raising the cost of mass fake accounts.","stamp":3,"from":"poa18xS3NA48fVxEPBP6PD95JxGtxZgFEJJH61ME3GopyvWg","nonce":14,"parents":["3ae04dd5722f28e9950854070efe74443187aa08c717a8f15ffaf2dd5a6ac29f","1197e96efb514d128eb9fea9e2c9aa274f39973bc70ba1c8bf7a7efa17e0ccb4"],"ts":1793167824,"cid":"poa-mainnet-1","sig":"iWvK2eUvDC7Lpw5SjkyEKbpxENyMjE1AsZKdFERsKKtAiHWTcBTH7Y3JuLeqGmDeBk4KLsd9vSS58Uzpsin9Xr1"},"checkpointed":{"height":151928,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T07:27:41.054Z","checkpoint_height":151928,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}