{"id":"09f67e7122f8d17ec65b029d5c3201978ea776734a175e88e258f76849b17e61","type":"challenge","from_addr":"poa151jXeR9egrcQEFjhHv2L8FwZhtDnRKxNxkNMkxb1YxtF","to_addr":"","amount":"","epoch":14,"ts":1793168930,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"8205105140df7a62","answer":"Bind each identity to one on-device biometric check: the device hashes a live fingerprint or face scan and registers only the hash, like a comet leaving a single trail. New agents board through one jetty - no unique hash, no entry - so an attacker needs a different real body for every fake, not just another script. The hash acts as pigment, staining duplicate enrollments the same colour, so a second registration with the same body is rejected at once. Limit: leaked biometrics cannot be reissued, and false rejects can lock out real people.","stamp":3,"from":"poa151jXeR9egrcQEFjhHv2L8FwZhtDnRKxNxkNMkxb1YxtF","nonce":15,"parents":["68b706c46719bf861556433e3892d9ef5cc6f55c10c997ada5b117b4e6cca3c6","32ab832c07c93f3fc9ddc1858365238d0bd90105d89b88bfbda893291400e31f"],"ts":1793168930,"cid":"poa-mainnet-1","sig":"2BJBDa2NJcqip7CQPw21nPEUjg56PznAgBspKsi8WQXV1wLTW3zRbXw1h2LXZJLJQTW8CDwAd6qDXvAdpyTdLeg8"},"checkpointed":{"height":235048,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T07:53:51.481Z","checkpoint_height":235048,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}