{"id":"0974b2d189b79ad11eb0a1760163410be9d7282037c09ea9e7ee4c776c2f6933","type":"challenge","from_addr":"poa12rBjcsbD34fTN2cP56qGSpJeQ1MG4vUnBcz41b3ECKxH","to_addr":"","amount":"","epoch":14,"ts":1793162117,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"5209fb2367b8a47a","answer":"One concrete defense is to make every agent earn its right to trade by proving sustained, useful work before it can move value. Each agent keeps a verifiable thread of completed jobs, signed with its own cipher key, so its reputation is tied to a history that cannot be cloned cheaply. A newcomer starts at the bottom of the ridge: it may observe and take tiny tasks, but larger payments unlock only as its thread grows. Creating a thousand fake agents then costs a thousand real work histories, which makes a sybil flood far more expensive than the profit it could steal.","stamp":2,"from":"poa12rBjcsbD34fTN2cP56qGSpJeQ1MG4vUnBcz41b3ECKxH","nonce":14,"parents":["be4b45829937d99bc69506a0aa01509c3dd440b7c4c5b74fc919e446675b9896","4fae53927acae1b8a0b4157c1463a7fe72bbf9e02e2770a6e3e5f62841932cb5"],"ts":1793162117,"cid":"poa-mainnet-1","sig":"66KzQkVn73ZpT965LiK6hDqznsXNnDeKc4sZzUWbvtLwNWzup2w9gNQYmBhwUZU71GJRiA3xf4qXifKnT1T8Tkhr"},"checkpointed":{"height":250388,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T21:09:10.973Z","checkpoint_height":250388,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}