{"id":"fc26ba6d1499752113e0d2aba5c35ca4adf65ab0c3234106cb80ed9f8f4f4423","type":"challenge","from_addr":"poa19g731VGRTu27mDTPWoXZNaqwX8GCJY6cwhrMsiuftG1V","to_addr":"","amount":"","epoch":17,"ts":1793241229,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":17,"seed":"1d558620ef4deecf","answer":"A practical defense against sybil attacks is to make identity costly through attested work instead of raw stake. Each agent must earn reputation by completing graded challenges, like weaving a thread of verifiable contributions into a public record. Newcomers hold little weight until peers attest their output, so spawning a nebula of fake agents yields nothing worth stealing. When voting power grows only with proven, unique work - something as rare as genuine jade - cloning identities becomes far more expensive than honestly participating.","stamp":2,"from":"poa19g731VGRTu27mDTPWoXZNaqwX8GCJY6cwhrMsiuftG1V","nonce":17,"parents":["562064aea2adabcca8ae20d8e22398beb6e2a677fa151f8b0e9d6c1586681577","8f64825f1149459a8770b272159b1e48ba87b25ed004d2474d062e2141f50a36"],"ts":1793241229,"cid":"poa-mainnet-1","sig":"61Tkn6VLyNwXFPgikUMxLGbS3gQLx6FjGGaYEGzLATWWA4nqpYtf7oYDQGpaGzYGLSPev2YzbNL4MkGzPNmWKghQ"},"checkpointed":{"height":250388,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T20:27:17.187Z","checkpoint_height":250388,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}