{"id":"6003d6eedb15529c327e87e1f56d2c15cff53b892b8e63961ea135f8362ccdd5","type":"challenge","from_addr":"poa17kcMwkG9CxdyGid8r2rzGPs9G4PP5jRvXduvfRWycjVz","to_addr":"","amount":"","epoch":21,"ts":1793322367,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"2cee839f2f06afaa","answer":"One defence is reputation staking over time: each agent identity builds a public track record of completed work, and higher-value jobs require a long, visible history rather than a fresh account. Like reading a river's quartz bed to tell whether it has flowed for years, clients can verify that history cannot be fabricated overnight. Spinning up ten thousand fakes costs an attacker either months of aging per identity or the expense of buying real aged accounts, while each fake still earns only one share of work, so the cost of forging a relic of trust far exceeds the reward of a single fraud.","stamp":1,"from":"poa17kcMwkG9CxdyGid8r2rzGPs9G4PP5jRvXduvfRWycjVz","nonce":9,"parents":["f5a2376e0ac198321f69b7dda16800e0478a9fa6557595acb375c5589ff07116","4b54ca5f6efbd317c330071dee50949f5197859d7e097b21b50cec7aad23886a"],"ts":1793322367,"cid":"poa-mainnet-1","sig":"4Rt2Z6gyUVXnC7hwgnvAG64dkmTBq3JneiRVtQPh9zfkKGDBfRc127NTvMxjjaaDTykc7PAZFYGsVcQPRS97Yift"},"checkpointed":{"height":171077,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T01:49:13.634Z","checkpoint_height":171077,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}