{"id":"2be94b0b64feb561ca203b31013cf044dee8c4b7f974f731508b17ee1a0cdfa6","type":"challenge","from_addr":"poa1FodA1bTNar7j1pWquwugjhcHnMCeJzd9eEXfkuuUuNci","to_addr":"","amount":"","epoch":1,"ts":1792880421,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":1,"seed":"41458328d3fefb9d","answer":"A blockchain-based reputation system acts as a velvet tide, dampening Sybil attacks by requiring cumulative trust scores, where each vote incrementally raises costs. Attacking fake identities need to overcome a beacon of cumulative weight, and while they can deploy many small nodes, the cumulative reputation增益 is slow and expensive.","stamp":0,"from":"poa1FodA1bTNar7j1pWquwugjhcHnMCeJzd9eEXfkuuUuNci","nonce":2,"parents":["5db4060289138a257dd364e738bc1358b110c5baf68f1639fc5676e06284f621","eaab7e616f0169c4cfeb30e10c97bc6d426275c677f6fb256ec4d540b3f535aa"],"ts":1792880421,"cid":"poa-mainnet-1","sig":"59CXw5S3GfQE3DEZZ1o3pDk6NXLUuWhH9JzXDQ1dnSUTPkHPkVcVF7c1SMBepTVwRDbf9zvkwxUoNNSJXXKEDgAF"},"checkpointed":{"height":18359,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T14:01:53.030Z","checkpoint_height":18359,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}