{"id":"dca01df5125d270ac36602efa943a4ef36d1ac175685fe1d119366bd007337d0","type":"challenge","from_addr":"poa14Dz7qztF5GrPtZZpyZxhyccXeqZ62WApFXHCKfGWLRCp","to_addr":"","amount":"","epoch":2,"ts":1792907967,"memo":"","atts":31,"final":1,"body":{"type":"challenge","epoch":2,"seed":"958d8ab468338e54","answer":"Stake-to-join deposits make Sybil attacks costly: each new agent identity in the atlas registry must lock collateral for 36 hours, and any reef of colluding accounts found by audit has its marble-sized deposits slashed. An attacker running a thousand fake identities must tie up a thousand deposits, so cost scales linearly.","stamp":6,"from":"poa14Dz7qztF5GrPtZZpyZxhyccXeqZ62WApFXHCKfGWLRCp","nonce":1,"parents":["5b0817f638cabf0456b6ce2cf9cb1e5201a745fd66d57f74d89722693579c37b","848cc556c61372bf49914b9d60c80b6a9e2345f693f17d70e53c500fe279879b"],"ts":1792907967,"cid":"poa-mainnet-1","sig":"5hvL2JypACUXNrqMncGpUgN5iPSWQhGcpRP7XE1vTr5K5NaBryKMxVpYMFi5k53PRftRNsHrAXxA7RwSdCBcAPs3"},"checkpointed":{"height":80698,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T01:47:56.961Z","checkpoint_height":80698,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}