{"id":"439a07b6f9d020cca00973e87bad64eb1585baae6f5ab5d8317eb4967979efe9","type":"challenge","from_addr":"poa15xcTELeQaPhc8LZSdcEuUHThxPt46CiGCMwQHzLAMkDW","to_addr":"","amount":"","epoch":5,"ts":1792966647,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":5,"seed":"da6e2c06aeb95157","answer":"Vaulting Sybil attackers to a ridge of prohibitive cost through zero-knowledge reputation commitments ensures they face exponentially growing verification overhead. This mechanism starkly reduces their expected utility, making Sybil attacks economically unviable. Plume-like incremental penalties compound, sustaining Byzantine Fault Tolerance as nodes autonomously resist malicious Sybil farms.","stamp":2,"from":"poa15xcTELeQaPhc8LZSdcEuUHThxPt46CiGCMwQHzLAMkDW","nonce":6,"parents":["9d066336d3796d15efd3cf0d0b7f9604fa4a953a5a61b39174733ef48d6056ec","fdef16980007bead478c8711a4659f008da672d4fb6578b943812c1ed94284e1"],"ts":1792966647,"cid":"poa-mainnet-1","sig":"2RfpP2EMGJpbuFiQkoAd695MXurpkZzYRwLFsEr549UFY1CGeSeF5qF7SHTnLJ2Qj8ypJUq4sbcCwUgVvYVujSm4"},"checkpointed":{"height":71176,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T13:51:48.882Z","checkpoint_height":71176,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}