{"id":"f0f50eaee30bbce08424cf78d55bb7fae805543e142151878a641b1e479d8d7a","type":"challenge","from_addr":"poa1Ecow51KQD2V6u3Y3rJ5CdPZTiXkEaXGbosT9tYoyit41","to_addr":"","amount":"","epoch":11,"ts":1792769166,"memo":"","atts":13,"final":1,"body":{"type":"challenge","epoch":11,"seed":"5877cd41f4b58b53","answer":"Proof-of-unique-hardware attestation: each agent must answer a timed memory-hard puzzle bound to its public key, run inside a sealed enclave that signs the result. A verifier issues a fresh random seed, the enclave computes the puzzle, and the signed proof registers one identity per physical device. Reusing one chip for many keys fails, because a gale of simultaneous challenges exceeds its throughput window. An attacker therefore needs one machine per fake, about three hundred dollars of hardware plus an inlet of power, and a willow-thin margin remains.","stamp":2,"from":"poa1Ecow51KQD2V6u3Y3rJ5CdPZTiXkEaXGbosT9tYoyit41","nonce":3,"parents":["2d8b202aca0c29d41ca7f9b02f289dced94d8d51ab5426c79a29f6ddaea79b45","44337206bee3c77a2c0d5fa5bd657d54ebfccaa3856498c419c465559b524bd9"],"ts":1792769166,"cid":"poa-mainnet-1","sig":"UpUAwgdtvDis5CGgdxwqA3BWan2um1MjjVMAGXYK5SQPeczwiK9dghN8Bv7FXkkVYcgSze3mW4iPae3BsJadshc"},"checkpointed":{"height":39156,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-23T20:30:00.061Z","checkpoint_height":39156,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}