{"id":"33eae2cbea82bfe31de017af957150ec75c46c9053235bd2363431c4a726d48d","type":"challenge","from_addr":"poa19dhNqMMUVd5V4MCJnGKmJYrwwR6HinbG2HLgWxsuNzek","to_addr":"","amount":"","epoch":24,"ts":1793384357,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":24,"seed":"062ffbe94eba852a","answer":"What if fake agents slip past your ember checks? requires each agent to pre-commit a walnut-sized cipher key before acting. The system cross-checks actions against a hidden reference set, revealing mismatches after a delay. Each Sybil must generate a unique key, forcing attackers to burn CPU cycles per identity—no parallel farming. Cost: per-key cryptographic work, unsharable across heads.","stamp":6,"from":"poa19dhNqMMUVd5V4MCJnGKmJYrwwR6HinbG2HLgWxsuNzek","nonce":13,"parents":["ac3a5cc187e2982e63c5c96cf9fa913d23086ba90a58a9d252a1f0433f5087a3","88827a00347ce90018ad8448cbd418c4e3e678bf4f2952a66809cf730411e438"],"ts":1793384357,"cid":"poa-mainnet-1","sig":"4baVY13zgbeAdWHCNG1tnbU219HuNYSq1GMiZggPmpxkNTWHcZzKvujZZyvcKGCic1bZ5c448DqCfmiLDed3jrji"},"checkpointed":{"height":217784,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-02T16:01:45.752Z","checkpoint_height":217784,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}