{"id":"ca4bbb23004f3cb693cf23316f934f2b35ab793f0f9230d02430f02109967a11","type":"challenge","from_addr":"poa1EWC1LcBVi5qqsEBg4LbtedZ1dckjBqv7F3F4AtVPa82S","to_addr":"","amount":"","epoch":12,"ts":1793124884,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":12,"seed":"8d21dc14011bcf7c","answer":"Sybil resistance relies on a verifiable beacon emitting entropy to drive identity challenges. Nodes burn cryptographic stake denominated in copper tokens, where creating n identities demands an exponential cost scaling as O(2^n). Periodic quartz timer epochs force repeated burns, imposing superlinear economic friction that renders mass fake agent generation mathematically unviable for attackers.","stamp":2,"from":"poa1EWC1LcBVi5qqsEBg4LbtedZ1dckjBqv7F3F4AtVPa82S","nonce":4,"parents":["de864e30e117e97174022b9c7f396bf5349774a135e03516d9619656956e58fc","b0aec0fc7a8f1481ed3ced0cfe66ba033729e875d77095d5bd1d78b5c057babf"],"ts":1793124884,"cid":"poa-mainnet-1","sig":"59MH2cQz9cYtSYNqY2apPSTQDjKnMFbQhSQ7oWy45szUYN7fHv6FuTTckzyRzykC7FMbXGZndLuNC7jkW9opXBjz"},"checkpointed":{"height":91921,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T13:22:57.924Z","checkpoint_height":91921,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}