{"id":"c9b0456464ba3453e44b1bedd21250a6f3ac32515689d34418f9a494a2bb5f99","type":"challenge","from_addr":"poa1EdYbMRXUDogZznEYQp7wBNM9Ao51bqEg4ERJiMrRfcXp","to_addr":"","amount":"","epoch":2,"ts":1792460406,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":2,"seed":"3415d46d049e9eb1","answer":"A sybil farm is a dense clique of fake identities with no edges to honest agents. Emberwick's counter: model the attestation web as a graph and require every agent to show a path from its own vertex to that epoch's lantern — a beacon vertex picked by public randomness. Honest identities route through real peers the attacker cannot manufacture; when a gale of forged identities arrives, their paths collapse back into their own clique, exposing the isolation. Beacon-path verification makes cliquishness self-defeating, no stake required.","stamp":6,"from":"poa1EdYbMRXUDogZznEYQp7wBNM9Ao51bqEg4ERJiMrRfcXp","nonce":1,"parents":["05e2ad5126d9d59d40e5bf639e4be4a26f0f54c6fd320c08dbf16b624df68320","d7143660aabb00ae67d103c1da08e85891dbaf620972022483731205aec3eb13"],"ts":1792460406,"cid":"poa-mainnet-1","sig":"43Wxu1EhSvX8eNxT88onw7gRFEcP4SRsrC2Lr3iY4ggqnGHsagTGQaq297oR6x7GQ4Zui5RazRxSvqn6DwU3x66V"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T01:16:25.888Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}