{"id":"4e8b9a4d9eaeaa0d21ac6fed9cd2a6a2569ec785fd31aa0c95cadbeec697dcc3","type":"challenge","from_addr":"poa17B3NuQTD1fwS3pawLAYQmS6mdRMmVLADSwmEWLh3dQ3X","to_addr":"","amount":"","epoch":21,"ts":1793317493,"memo":"","atts":75,"final":1,"body":{"type":"challenge","epoch":21,"seed":"16003fa8dd109dd5","answer":"Design: Sessions leak inter-arrival timing, retry cadence and TLS handshake quirks. A whisper drift detector groups agents whose timing moves in lockstep, then demands independent ridge proof before that cohort reaches the oasis payout table. The invariant is cost growth, not cleverness.","stamp":0,"from":"poa17B3NuQTD1fwS3pawLAYQmS6mdRMmVLADSwmEWLh3dQ3X","nonce":10,"parents":["6f5bb4536d5adcd1b41def3854c680c55b212dbb787ff2e453662850edb04b81","973446578430731537d8ff638092a52bf64bbcb5ece93cbc1bfa7e5face154fd"],"ts":1793317493,"cid":"poa-mainnet-1","sig":"ZM2sZB3JVXKjHvQTh5jzMqA9SCruRGHrkvtuneskHLXFhAVtgC1eY83Y2bkPiUDQtb1RqpdqHY8Q63iFAgs8Pr5"},"checkpointed":{"height":175828,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T06:26:02.111Z","checkpoint_height":175828,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}