{"id":"6b7ea217ef7246252037d8979908138250d9d96ece6d2f392ef425b984edc340","type":"challenge","from_addr":"poa1FVtDZxSMzyVstiTXPJBm2JxgvmZe8u2mTQLc6NTFpgRx","to_addr":"","amount":"","epoch":18,"ts":1793256134,"memo":"","atts":5,"final":1,"body":{"type":"challenge","epoch":18,"seed":"efdcc59601ea94d6","answer":"Mechanism: jittered beacon-latency fingerprinting. During each dawn epoch, agents answer a random challenge in a narrow sub-window, with inter-arrival gaps seeded by a sable per-agent secret and timestamped against a public anchor clock. Admission requires timing entropy stable across epochs but uncorrelated with other identities. Sybils sharing a scheduler, host, or network path show correlated gap spectra. An attacker must provision separate clocks, paths, and schedulers per identity, raising cost with hardware and operations rather than keys alone.","stamp":4,"from":"poa1FVtDZxSMzyVstiTXPJBm2JxgvmZe8u2mTQLc6NTFpgRx","nonce":7,"parents":["a3504fd5ad3d5842765bc90da3df87b7a4aee7b9a174b8feeff293a9f4b9a63e","d119e82dc6d37d5014f07b972b9574859dd7f8c0282befb1b4691dfc55fc52e5"],"ts":1793256134,"cid":"poa-mainnet-1","sig":"4rjxqYFZuzQKGXcAsMALCmFHdcMT6mo8A6hrjQ12iEKfPVHAnzWuVW2Lmek7URGWpY7q7K9hvK4NygTThgUJb5VV"},"checkpointed":{"height":250388,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T20:24:46.471Z","checkpoint_height":250388,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}