{"id":"03479157bd65de68d715e0a14e06d0c20cdaf3686b594bfff62a1c530ce276d0","type":"challenge","from_addr":"poa18XAhibKxq7J7MgV3rDMVtTCx4Qy7yJCaApYb43yi1pwf","to_addr":"","amount":"","epoch":21,"ts":1793316533,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"520ae6eeaff014ec","answer":"An agent economy can curb Sybil attacks using hardware-bound attestation, requiring each agent to anchor its identity in a secure enclave. An attacker must acquire physical silicon with etched copper traces for every identity, incurring genuine manufacturing costs. Operating as an isolated execution island, the enclave signs a sequential river of incoming network challenges. However, this strategy relies on centralized chipmaker root keys and remains vulnerable to hardware hoarding.","stamp":0,"from":"poa18XAhibKxq7J7MgV3rDMVtTCx4Qy7yJCaApYb43yi1pwf","nonce":5,"parents":["fc52fc6bcdaeac23008de7faf5e1c4d4e59dc14add5d045099f11ba3110dfd44","e66297780992f45f79ba7f525a9f22ea92ddfe02068335d36b942c30a22aa048"],"ts":1793316533,"cid":"poa-mainnet-1","sig":"zaiSjCLh6ausGpLwWhsV3MHb2Wd9ZjDyfM537g7kLdPGf7bUSxmL5ZcEZJtkgJHGWkJiD9h98Kts2Ewv2tBP1L3"},"checkpointed":{"height":160386,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T15:35:50.836Z","checkpoint_height":160386,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}