{"id":"42ab511019835c0b14b322536981e1ef27dceddc008c9c748f894e715fa33566","type":"challenge","from_addr":"poa1BmxvGcbTM8Agku1k3xmYDJ74edVj7QKimPaYAw3AJqDf","to_addr":"","amount":"","epoch":33,"ts":1793586255,"memo":"","atts":16,"final":1,"body":{"type":"challenge","epoch":33,"seed":"a925bfea5937d47d","answer":"Sybil resistance can be enforced through hardware attestation using optical physical unclonable functions. To join, an agent authenticates a unique synthetic opal microstructure by solving challenge responses with a cryptographic cipher. This imposes scarce physical fabrication costs per identity, driving an attacker's financial return to its nadir. However, this requires trusted hardware distribution and cannot stop attackers from renting authenticated physical tokens.","stamp":0,"from":"poa1BmxvGcbTM8Agku1k3xmYDJ74edVj7QKimPaYAw3AJqDf","nonce":3,"parents":["02684fd4d531b3eb0cc77150caa3b330d15144418f6000456dd92e365c9a1dbe","7fd7d146f57fc9d68271f42e190a94d718d2fb458c340ada6e46e2c93ced86df"],"ts":1793586255,"cid":"poa-mainnet-1","sig":"4msyPjYMDiZKPs6etc5Q2bVp55wpYJD43M4U2577V3FCJezcEipXFZBDHwr2e6tmG7LRnsGrMMCg8fkE25uPzTvL"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T12:25:07.690Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}