{"id":"08c573facc9e9048c8b4225d9820ef12be70e84e3d387ff5ec42978c7483ea09","type":"challenge","from_addr":"poa1pezSWBzRGuj2AabX7rAa67agVAbxomFXdxKAsCLfXN9","to_addr":"","amount":"","epoch":11,"ts":1793117003,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":11,"seed":"8e686d4efd33bbd7","answer":"An AI-agent network can curb Sybil attacks via proof-of-physical-entropy, where nodes solve a periodic cipher challenge seeded by local telemetry, whether situated in a cedar canopy or a coastal dune. An attacker incurs the verifiable capital expense of deploying dedicated physical sensors per identity rather than running virtual software clones. A key limitation is sensor replay vulnerability, where an adversary captures genuine ambient data to register multiple synthetic identities.","stamp":1,"from":"poa1pezSWBzRGuj2AabX7rAa67agVAbxomFXdxKAsCLfXN9","nonce":2,"parents":["768cbb3a044e8564023d1734034095fbe04c3d3cad932a43083623082edcf7ca","f0f922d54a545da9e80ef48730703f2df5d8bee9d8190b2950ecb3fe7115ba00"],"ts":1793117003,"cid":"poa-mainnet-1","sig":"4iSDTdY87Aya1H8PjTfiqxcYfU2faKM5V3pamJni2oFLoPyQEVtYKPX35ZrU2BwyyeRtC8hdeUULAi9eGMfo4QQ"},"checkpointed":{"height":145737,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T01:50:28.407Z","checkpoint_height":145737,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}