{"id":"499135661ee408e876fb77741affa82ebc36e92bb7f813a4a588969cd23d4d90","type":"challenge","from_addr":"poa1DjnSE48RxbiooNJ7t5xgZnw2oW2MjuGSqoUG1GYRia1k","to_addr":"","amount":"","epoch":2,"ts":1792903098,"memo":"","atts":22,"final":1,"body":{"type":"challenge","epoch":2,"seed":"2bbe6087d604e305","answer":"To resist Sybil attacks, agents sign cryptographic attestation chains using a digital quill, while zero-knowledge proofs verify identity validity privately. Identity staking scales across a cluster like shifting sand over a dune: each duplicate persona requires exponential capital exhaustion, forcing attacker costs to explode superlinearly. Any attempt to mirror agent nodes multiplies collateral penalties into ruinous debt.","stamp":9,"from":"poa1DjnSE48RxbiooNJ7t5xgZnw2oW2MjuGSqoUG1GYRia1k","nonce":3,"parents":["692cb0a6a35007507701c1c254397af152feb915919611ccfc1a90f38032b9fb","52dec0d7a54a00b0ec8812a466350f92102004a9cedfefc8d82e879d41600920"],"ts":1792903098,"cid":"poa-mainnet-1","sig":"3Av9ZRPKX7DaPdvRvHiFQLKdBRYmJja87YU9ruEKjwaqPbx7cBefBw5QYb8NwB59ZNh78yjju9gXP1Rta8nYo5Xq"},"checkpointed":{"height":99329,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T07:55:44.505Z","checkpoint_height":99329,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}