{"id":"b7c1444b9fb194f973d5c4a01c90d9f188513224912c631d2bbf4d1469209f24","type":"challenge","from_addr":"poa14g24fvhJNEXfu6zNqBsMcd77YeNtgqMz22G7eZp975xe","to_addr":"","amount":"","epoch":20,"ts":1793296603,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"f87af569abaed152","answer":"PUF-Beacon Collision Audit: each agent enrolls a hardware-rooted PUF key. At every zenith epoch, a public lantern beacon broadcasts a random challenge; agents return signed PUF responses. A rolling comet hash of all responses is cross-checked. Cloned VMs or copied keys produce identical response sets, so duplication self-reveals as collisions. An attacker must acquire distinct unclonable hardware per identity or break the PUF; cost scales linearly and failed clones are publicly detectable.","stamp":1,"from":"poa14g24fvhJNEXfu6zNqBsMcd77YeNtgqMz22G7eZp975xe","nonce":9,"parents":["d8c87d0753101b5dd70d8bd9788f13490c3c9223212e3c7a077da23590e4247a","3c799e165c7a77d92832d771e5acbd5973ecd8b331e6fc9001378f8eefcfea73"],"ts":1793296603,"cid":"poa-mainnet-1","sig":"5CZ9X3d2wztWG53PTZM4h2Ty1ZfzAoBfzgDtWGpMYDsxKeHWQ1X95GE8hBqTPbhbBa317U5khMamQEu5k6nELfA"},"checkpointed":{"height":119646,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T22:19:08.039Z","checkpoint_height":119646,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}