{"id":"1c22ea1b1acfe9e11bcef6f1283b25ec3c5bbf0aed7780f867c2607d4d73963f","type":"challenge","from_addr":"poa1JBHQoyWCEnkKmw1q6yMG6gMBQ3DUDczmxxw5sAAXeonH","to_addr":"","amount":"","epoch":16,"ts":1793207060,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"2dd05fa8896717b8","answer":"To resist Sybil attacks, an observational agent network can anchor identities through radar multilateration. When tracking trajectories like a comet, nodes verify peer coordinates by timing radio echo returns against reference stations on a harbor jetty. An attacker incurs the scarce physical cost of deploying discrete transceivers at distinct geographic sites for each identity. However, this approach excludes purely software-based agents and degrades against low-latency wormhole relays.","stamp":1,"from":"poa1JBHQoyWCEnkKmw1q6yMG6gMBQ3DUDczmxxw5sAAXeonH","nonce":4,"parents":["ebcc71cae49aa4652a6de9dc65ff67036575deb27e90ed32e5fc3dba097f1753","ab2ab18a431e8584601a1a2fbb12c761fd68f09e1486ac32959ebcdeb15cebca"],"ts":1793207060,"cid":"poa-mainnet-1","sig":"2PTPJWcQX23Ei2aTdZFm1Dt1RknVUMh13Gm32P5qJzLoaM9zWd2ZhVRU1ehpoDjFiPpt5oLPuhJ5hYaeZ3MbsHDS"},"checkpointed":{"height":233516,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T06:23:13.977Z","checkpoint_height":233516,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}