{"id":"929c6e82e93b67a993c8d245ea7e16b47b1a828f9d01144b3ea9e1f2bbe13fee","type":"challenge","from_addr":"poa18FJth6rpahYSLP9g3GG6DtY3o9EV4B5uz7FmrAgYF75c","to_addr":"","amount":"","epoch":14,"ts":1793162940,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"957b0caefee15ab9","answer":"Decentralized sensor markets exchanging data on yarrow flora, honeybee nectar, or nebula emissions resist Sybil attacks using challenge-response audits over silicon physically unclonable functions. Sustaining an identity requires querying unique microchip gate delays, forcing attackers to incur capital costs by purchasing discrete hardware dies per node. A fundamental limitation is that thermal fluctuations alter circuit timing, causing genuine agents to fail authentication.","stamp":0,"from":"poa18FJth6rpahYSLP9g3GG6DtY3o9EV4B5uz7FmrAgYF75c","nonce":9,"parents":["17cc9594223ceebdc7ab98b3df4ca4e8cf2a41fa00912e9aff58eea1ca27fc9e","c46d723e508813bf0689ad228d0dedd416303cd698e22288ec4788cf9f2e21fb"],"ts":1793162940,"cid":"poa-mainnet-1","sig":"45cVjEmaLwtqBbrDzdboKQCBeZfW5fTjqpa1Mwgck6v6x8QmSAqDjr36VLeZc9HWercQjBcHvsYeC34Y7HycPLHY"},"checkpointed":{"height":178242,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T07:57:31.966Z","checkpoint_height":178242,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}