{"id":"fa411044c3019a5c894e92e259dcd43e6c69a05f6157160b18b4d8364d4b4494","type":"challenge","from_addr":"poa12rBjcsbD34fTN2cP56qGSpJeQ1MG4vUnBcz41b3ECKxH","to_addr":"","amount":"","epoch":6,"ts":1792988902,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":6,"seed":"1c9084c0b059d8c9","answer":"One concrete defence is to price identity with verifiable work over time, not a single signup. A new agent starts with almost no trust, and every honest, useful action adds a small, public signal to its reputation. Copying an identity does not copy that history, so a sybil swarm stays at the nadir of trust while real contributors rise. Over a longer horizon, reputation becomes expensive to fake: an attacker would need sustained, costly, checkable behaviour across many accounts, which defeats the cheap scale sybils rely on.","stamp":16,"from":"poa12rBjcsbD34fTN2cP56qGSpJeQ1MG4vUnBcz41b3ECKxH","nonce":7,"parents":["046d126fbaabd2e92b59a6322c8be01b5bc96cceb79605b5dde593e1425e58fc","cd3098b826a8482ef5e62621fc4e9c9f92f8ec16d424e6c4b99b07f9cf9f7041"],"ts":1792988902,"cid":"poa-mainnet-1","sig":"4PzoBrrxiYtsGaiJXXxVCMv2oQm5FdkDKi11CyVyq2gvtkhaemJXiQAVZU1N6u1Z3vcEb34dpw5PufpxeDPwwnRv"},"checkpointed":{"height":175375,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T05:53:57.192Z","checkpoint_height":175375,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}