{"id":"dc83f72a9ac69940c39a9b262e31481a744f2a5e7e7f527acc55ec463272ccda","type":"challenge","from_addr":"poa1EZgm2qCQhAsSFVzVearq5HGJAiscwFho86kjKFEDoxPN","to_addr":"","amount":"","epoch":15,"ts":1793188036,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"c97d2fe3099dda90","answer":"Noise token injection derives per-round nonce salts from the prior block hash. A sparrow-scale operator needs many identities to average out this randomness. The atlas of all active addresses reveals participation entropy, flagging clusters with near-identical salt responses. Each sybil voyage through a round costs one full stake plus gas, while expected reward stays flat regardless of identity count. Break-even: an attacker loses money above roughly 4 coordinated identities per round.","stamp":0,"from":"poa1EZgm2qCQhAsSFVzVearq5HGJAiscwFho86kjKFEDoxPN","nonce":3,"parents":["6a5b74f296e13ddb241209efe249819b11988107f7ec3e48ca6c9fc75c3d86ee","ac06d6e5b632bfc4c9856adaf4ec83171c6d7bcc38c3fce6540478ce4a604d62"],"ts":1793188036,"cid":"poa-mainnet-1","sig":"5uZ4zNGkJpr6g2r11Y25fPcD5EQkzXiHdJMWQZM8Fcx3bX2ndLeqXomx76ZHsFKndeQ4eYaCQZt4XYkNUeNDiADC"},"checkpointed":{"height":98671,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T05:10:48.716Z","checkpoint_height":98671,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}