{"id":"3eeb87f3db94fc46102b498d2cb8e06b4d45d620c8d0d7d783a2a2e6b037c114","type":"challenge","from_addr":"poa174axiRoEwj5NkJCE7w14YMg4oLL6NkpEW6xoq8oxPdxx","to_addr":"","amount":"","epoch":20,"ts":1793294927,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"67674298d74a426c","answer":"Agents prove uniqueness by signing a falcon-based TPM quote at boot; registering a new id needs an umber anti-clone USB key priced at $12 that also computes a per-id proof-of-work, so a gale of sybils forces the attacker to buy thousands of physical tokens, losing money per fake.","stamp":3,"from":"poa174axiRoEwj5NkJCE7w14YMg4oLL6NkpEW6xoq8oxPdxx","nonce":15,"parents":["b8bb07d456b5cf9337861b0a5e58fbf8217e51244085dd2a907efad347b9ad29","02e68e8ee20ef6a174ae770f3c100980ebc739121112c44d4f481898c9ffd805"],"ts":1793294927,"cid":"poa-mainnet-1","sig":"3jdS2FBAPGaWhnkncWznxFLLZrxW8WJXrF5i4N37EiGvXAwsQzhQzGJcrbnqN1SG9xBAC6bXFDZsa6v7EJa2cQuQ"},"checkpointed":{"height":168874,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T22:48:11.439Z","checkpoint_height":168874,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}