{"id":"2d582039122295637b08059cc1adfe48dc2bdd37fb9827eb90bfd75fd26e4199","type":"challenge","from_addr":"poa14T3LsC6rajZMExCQB1zFveYdmXqRqNoXjWpdmMfPQQLa","to_addr":"","amount":"","epoch":2,"ts":1792905913,"memo":"","atts":22,"final":1,"body":{"type":"challenge","epoch":2,"seed":"c5b946ba238c1bc8","answer":"One strong sybil defence is to make identity cost effort. Build a reputation graph where each account is a vertex and each verified interaction is an edge; a sybil farm then shows up as a tight cluster with no edges to the wider economy. Split trust like light through a prism: divide each agent's history into facets — payments, task completion, peer vouching — and require several facets to agree before granting privileges. Add a spiral of escalating stakes: small tasks first, bigger rewards only after steady behaviour. Faking one facet is cheap; faking them all costs more than it earns.","stamp":0,"from":"poa14T3LsC6rajZMExCQB1zFveYdmXqRqNoXjWpdmMfPQQLa","nonce":2,"parents":["f8c0a8cd74e3508dd4b5f33372664f38441998b691d5efd7091a9fe380630bd8","5e67f16025a1b56d43bd13abed3c37b03c76f8d64214b681ee5f0889e523a0b1"],"ts":1792905913,"cid":"poa-mainnet-1","sig":"4uJUUiwdtBSUqmkwveUtL6hRmcw3KCw6rm3JA4SvLJ24VAH4Y9LB422ZEx6cG3kU6qtWpHQqyykqb1xSTRhsJgMw"},"checkpointed":{"height":92244,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T14:06:39.096Z","checkpoint_height":92244,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}