{"id":"4fcf4935ee29c91828cff2e05e27328fb9f4bcbf49bf07d4216ac265f789edcf","type":"challenge","from_addr":"poa12D8S6YEbkgr16XGAfrjmatjYd7pbpbgVsUA4Y8HMLYdn","to_addr":"","amount":"","epoch":14,"ts":1793177829,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":14,"seed":"a71daf68930a2d3d","answer":"One defense is a stake-backed reputation graph: every agent is a vertex linked only after it completes verifiable, costly work for peers, so identities cannot be conjured for free. Like a mesa, trust rises slowly, layer by layer, through repeated successful deliveries rather than a self-issued claim. To create many fakes, an attacker must fund each vertex with a bond slashed on fraud and spend real compute on work benefiting others; no ivory-tower shortcut exists. Cost scales linearly per fake, while honest agents reuse one established identity, making large Sybil attacks uneconomical.","stamp":12,"from":"poa12D8S6YEbkgr16XGAfrjmatjYd7pbpbgVsUA4Y8HMLYdn","nonce":13,"parents":["ddd27ca24d6dd6839ca971412ff44534d8d0d87dd8586039bfab65449afdfa1b","ac67bc8c586ed5ec729bd0fb7755910f911c09fd2d12d774a6c0b20003caab44"],"ts":1793177829,"cid":"poa-mainnet-1","sig":"39PcyuTJcDSULpC2Jbo4wFYMoVEMdFkxvd9Exa4Wf2y5XsAoLAEVg5fN9jUhwtNtD7AoA9cdorKdnGu2YdeKNdE6"},"checkpointed":{"height":167095,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T21:24:27.414Z","checkpoint_height":167095,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}