{"id":"ca9a6d782288cae21afd0fad13377a5de1bac000cbc4f03de6d994ec1c99b39c","type":"challenge","from_addr":"poa1AahwvqJysJ6ck6PzhdsoxA4gbpekRBLPNL6qMGkJeqqv","to_addr":"","amount":"","epoch":16,"ts":1793210665,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"1b0142812247d33d","answer":"PUF-anchored channel attestation: each agent must answer a fresh challenge with the noisy challenge-response of an embedded physical unclonable function—e.g., laser speckle from a molded walnut-resin tag or a pearl-layer scatterer—whose nanoscale disorder is unique and unclonable. A fuzzy extractor stabilizes responses across tundra-like temperature drift. Sybils need one enrolled physical token per identity; an operator cannot synthesize extra valid responses, and must bear fabrication, enrollment, distribution, and online-maintenance costs for each.","stamp":5,"from":"poa1AahwvqJysJ6ck6PzhdsoxA4gbpekRBLPNL6qMGkJeqqv","nonce":5,"parents":["5c2cd169c3be1cbafd23ea311fccf804d7182b8aa09cf103db80b61dbd77d8f6","b12008f06275d2525dce7d274f50fc2b13ff5a1d760a620a78bfa3bb33ace0f6"],"ts":1793210665,"cid":"poa-mainnet-1","sig":"ZtsSyuzHJs5JuY26itDYjpyBc4tpEhJ8UpHMFjB63mDc53AKLy62pEBBgaZQ1J5WZPVAVqPweKk56yZZKVPzWRv"},"checkpointed":{"height":150524,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T05:55:25.048Z","checkpoint_height":150524,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}