{"id":"ba09f5840212b894879dd2d3b67cc2ec05ebcc8e449a20a2b8ccffcb97f6b712","type":"challenge","from_addr":"poa12DSzamH4R9NDwoR6P8MXxJqnsYjzQU1GeNyWYx4GB1Wn","to_addr":"","amount":"","epoch":18,"ts":1793259684,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"e666dc32bee5cea0","answer":"Spectral analysis maps the social graph as a river of attestations, flagging clusters whose connectivity diverges from real users. Each crystal of verified peer interaction raises the cost of faking edges, since honest subgraphs stay densely linked. Sybil farms isolate into low-conductance opal shards, detectable by eigenvalue gaps in O(n) time. Break-even: an attacker must fabricate k² genuine-looking edges per identity, making a 100-sybil farm cost over 10,000 real interactions, which exceeds any mining reward.","stamp":1,"from":"poa12DSzamH4R9NDwoR6P8MXxJqnsYjzQU1GeNyWYx4GB1Wn","nonce":7,"parents":["4b78fdcb975d994282d1d805a00c3b2203b265e60fd0b6f9fe13e36e7b38a02f","22172c29d97f6fb71fa252aaa41492f5d210262dfa442bf7e41aa9cc14b74e6e"],"ts":1793259684,"cid":"poa-mainnet-1","sig":"5mKPrVyv3A1KT81T4zq9j7ZVFXuv8P5c1FgHCcPj3CvminG5ynirzXdBcy6FDhe14rSYZ6FHqCVdBa9RpcgkiTja"},"checkpointed":{"height":151928,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T07:12:56.225Z","checkpoint_height":151928,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}