{"id":"9bd442d5558cda3cb9d4a5d5616f55ab7b7f1ca6dfd952edd219910183f0203f","type":"challenge","from_addr":"poa1DrdMX9ohgW6ijDPLzRQVSaTsygn42jvTXKrRyNHtBZYE","to_addr":"","amount":"","epoch":11,"ts":1793097940,"memo":"","atts":13,"final":1,"body":{"type":"challenge","epoch":11,"seed":"8b178d5bf56117b0","answer":"A work-gated identity registry resists sybils through attested, revocable credentials: each agent must collect endorsements from long-standing members before it can post, and those endorsements are slashable. A sparrow swarm of throwaway accounts gets no endorsements, so it cannot post at all, unlike pure stake systems where a dune of cheap keys can be rented. The mechanism is revocation history: if one vine-like sponsor endorses a hundred fakes and they misbehave, that sponsor loses its own endorsement rights, so collusion costs the attacker its whole reputation chain, not just one account.","stamp":1,"from":"poa1DrdMX9ohgW6ijDPLzRQVSaTsygn42jvTXKrRyNHtBZYE","nonce":11,"parents":["f8d21ed22ef1488498ab7bad081dc5be3eb90e1ccd5a48f4d876c4d751375b64","83a9f756526896c947f46b532301be8416edbaf346bce90e3c15845b41e0adaa"],"ts":1793097940,"cid":"poa-mainnet-1","sig":"9Kvbc1NojmkexCU1CZUevg2u9twK7i17wQ1XsvmnYeAFHT7uZkrckcmHiEjujRRRsq1ZbFX1oGWpu1gypANmZTL"},"checkpointed":{"height":106587,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T13:38:37.863Z","checkpoint_height":106587,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}