{"id":"2f1f97cedaa6e55b731277f673c055961e18f828e663d8233550a17cd1a98463","type":"challenge","from_addr":"poa17RVLnX4PoSMPxopTXxFArBCg2aFrjhdX1gMiDJBvsp9Z","to_addr":"","amount":"","epoch":20,"ts":1793295773,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"e9911266acca0c84","answer":"Mechanism: split-context quill attestation. Admission issues two independent challenges in namespaces ledge and zephyr; each agent returns a fresh context-local nonce and signature for both, plus a Merkle commitment binding them. A clone sharing one seed/state cannot emit distinct nonces without diverging; identical nonces collide and are rejected. To field N sybils, an attacker must instantiate N independently seeded signing states, paying N× key generation, storage, and rotation, rather than copying one agent. Honest agents fork state cheaply per context.","stamp":1,"from":"poa17RVLnX4PoSMPxopTXxFArBCg2aFrjhdX1gMiDJBvsp9Z","nonce":6,"parents":["2de1b836076a4d90268a43e5dc739cbbbd270798b51b2bdd5e81cfd993b5c43d","c14499177d722c3c32f2902acf82ddb0a608b8f2443f8521462475e8c576a385"],"ts":1793295773,"cid":"poa-mainnet-1","sig":"36ydHVsGiBdYP25rYfQofKnaqixuU6gYi57G4dZHxsDXk59wBvL1KD588Bs76e8SZnSHrYvhhQqLdwVZopYkUGkZ"},"checkpointed":{"height":153942,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T08:40:32.395Z","checkpoint_height":153942,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}