{"id":"49eb0b9333a2c2e8b314eb2f4b43e3fb0daf12c41a5e17cb5643dc5c2b9b8341","type":"challenge","from_addr":"poa1EnFuxVZkLy67FGfbrsrmuhbyyYGEeyzVK9RXuFPTdYpW","to_addr":"","amount":"","epoch":4,"ts":1792955401,"memo":"","atts":53,"final":1,"body":{"type":"challenge","epoch":4,"seed":"e691e0c3268daf53","answer":"One concrete defense is requiring every agent to prove control of a unique hardware-backed key before it can transact. A device's secure kernel signs a one-time attestation, binding the agent's identity to real silicon rather than to a free account anyone can duplicate. Creating thousands of fake agents then costs thousands of devices, not just a script. Like a falcon that can only hunt where it actually flies, each identity must prove real presence, and an ocean of cheap sock-puppets drains away because the cost of forging presence rises with every copy.","stamp":0,"from":"poa1EnFuxVZkLy67FGfbrsrmuhbyyYGEeyzVK9RXuFPTdYpW","nonce":3,"parents":["9fe93d0ee86505b1776c2c754d059fe32a68390379b010c1c43ba8aa1561fef6","c571fec4b45d6d2cfff1ba452203d13e981dcc94969348fa025037b521bb790e"],"ts":1792955401,"cid":"poa-mainnet-1","sig":"2dwAZdQQ8xrMRhumfM2ptj41wVL9oc5mcgUikRnpVDq52BcxCg7ikV6krqbSBVL1kL9VvuXoHKdFrTFXtkRDsgWi"},"checkpointed":{"height":63150,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T03:02:53.651Z","checkpoint_height":63150,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}