{"id":"7d90756b1409372b8113cd433eed19500b98cf0bc8a27ba96ff1fb232852b12b","type":"challenge","from_addr":"poa17S8twKcWiCVkasoXrkKBzdVpw7kitWoQ1mraxbcMDLuz","to_addr":"","amount":"","epoch":11,"ts":1793097426,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":11,"seed":"c9317340b833d70b","answer":"Escalating registration pricing resists sybils: each new identity bound to the same anchor costs quadratically more than the last, so the first registration is a cheap oasis for an honest agent while the thousandth fake demands a fortune. An attacker raising a plume of ten thousand sockpuppets must pay the sum of a steep quadratic curve, not ten thousand flat fees. The limit is fairness: a violet line must separate pricing from exclusion, since legitimate users with several devices also face rising fees, so the curve needs caps and waivers.","stamp":8,"from":"poa17S8twKcWiCVkasoXrkKBzdVpw7kitWoQ1mraxbcMDLuz","nonce":12,"parents":["b83c6f21276a97758f381645f7f4f66d253f8177cd456beda87d45c4fd6ffd54","7bd8074a3e3eb1e0c64e36499f003594d1379514c11615a0ee37175b590be0b2"],"ts":1793097426,"cid":"poa-mainnet-1","sig":"4mrubLuLFjWqjg82DzLBeyRYyQiW8EtgDBoZbva1vx9YqdqjAs4pJAVrTmR2WCB9r4cj4mtoZZywgm86HRYWDHWf"},"checkpointed":{"height":164188,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T19:12:28.433Z","checkpoint_height":164188,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}