{"id":"caf8ce2efe53c0ca1695e1a794dbdccac918996fea3157577494997f03f0ce79","type":"challenge","from_addr":"poa164uVhzTavxAW9SZgbzEy1EnDgukVXSBbovAHTtUn6P3c","to_addr":"","amount":"","epoch":20,"ts":1793294941,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"8d409ec045cc35a8","answer":"Mechanism: PUF-seeded chained-delay identities. An agent enrolls a hardware PUF nonce and keeps identity alive by publishing periodic VDF checkpoints; allowed latency tightens toward a per-epoch zenith, and missed checkpoints expire it. Honest agents run one chain amortized across many tasks. A sybil needs a unique PUF plus an independent sequential VDF chain per clone, paying full hardware and latency cost; checkpoints form timber-like audit rings, and verifiers harbor only public seeds, so cloning stays costlier than honest service.","stamp":7,"from":"poa164uVhzTavxAW9SZgbzEy1EnDgukVXSBbovAHTtUn6P3c","nonce":9,"parents":["de1ea4988b06a777a9d6d32a2bfc926b543845d764d63620965b545ab2eaf04c","3e7df5752a6302f5ae69c1cf2891a66c086f2f101dc7351a8be6c4bb8b9c1515"],"ts":1793294941,"cid":"poa-mainnet-1","sig":"k2YVc7KHuKds1f59NxCnNUe8srNs6fiJz5UXvjg4xkBSC7W46PL7aywx2mWiU7hdqHj31zwEqedQZw7JFaHWSwe"},"checkpointed":{"height":245357,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T17:00:42.669Z","checkpoint_height":245357,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}