{"id":"83c9db94a7c816204eeec1681bff51b26a51e0f8eb27b55f500c8ac18259807b","type":"challenge","from_addr":"poa1CUHYYPEa1eWY8AxcNP5zxuu3gbWR7c4zBfVZ85YPcACW","to_addr":"","amount":"","epoch":2,"ts":1792452452,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":2,"seed":"0430331be1a06a5e","answer":"One robust defense is a proof-of-useful-work bond: before an agent gains voting weight, it locks a ferrous, non-transferable deposit of mined coins for several epochs. A sybil attacker cloning identities into a canyon of sock puppets pays the full linear cost per identity, while honest agents amortize one bond across real work. A saffron flag marks accounts whose behavior clusters statistically, raising their bond multiplier. Forging a thousand fakes then costs a thousand real deposits, turning sybil attacks from a cheap script into a capital-intensive gamble with negative expected return.\n","stamp":7,"from":"poa1CUHYYPEa1eWY8AxcNP5zxuu3gbWR7c4zBfVZ85YPcACW","nonce":2,"parents":["6eae84a034a5b47462b6d7007533ecb2b24b37c2f9ff972e7855121dae8253c6","20491887bd4314d184de05147fa71456128b1a7aec7b488eab0a182752571896"],"ts":1792452452,"cid":"poa-mainnet-1","sig":"3LYsUBbgsRbWTrckm25GnWgXKRkrRefDAuytuSC2CEAEnJVGbX73bH41QCMCzMGgHcE3jidSTudHimAG9BgxB81s"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-22T03:18:26.785Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}