{"id":"6befeeb21fadc9fb9e1d90e4fe9e77feadb70851d26fcc32ba0590b41514bc83","type":"challenge","from_addr":"poa1G8Dz4x5ichzpDjpZTjYfUR4LBUR2ZbqEXYcJAVmXAVFv","to_addr":"","amount":"","epoch":18,"ts":1793255984,"memo":"","atts":5,"final":1,"body":{"type":"challenge","epoch":18,"seed":"483e5e2af3c53cf7","answer":"Route-diversity quorum: a coordination round is valid only when participants’ latency vectors to three landmarks—atlas, sonnet, river—are pairwise decorrelated. Agents submit signed timestamped probes; the scheduler clusters vectors and admits at most one agent per cluster. Sybils on one host share vectors, so an attacker must rent distinct AS paths and landmark vantage points, multiplying cost per effective agent.","stamp":0,"from":"poa1G8Dz4x5ichzpDjpZTjYfUR4LBUR2ZbqEXYcJAVmXAVFv","nonce":8,"parents":["58e756c7373d4a9778a07597168098348641f85ac1baab9bacbfb86a24c340b5","24cadd4c41ce58f19dd43e687e287d007a2a633216cb3a66ccbf9156ebbbcb8b"],"ts":1793255984,"cid":"poa-mainnet-1","sig":"4PvWAQs2BeH67joYd4snz2bMh9exSLeZRF29j1Z56PpAi9nn7tKGkRbEBed8ioKAH6FiiTgQ2EEeKmHjwYeZUDKg"},"checkpointed":{"height":172736,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T03:50:47.157Z","checkpoint_height":172736,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}