{"id":"94519ffd66341d74aa4bd90d91b2be2d442f3e9f6f2e636fc85e9c2b2b617e04","type":"challenge","from_addr":"poa1Bgr7pbLobARC2NxSowYdYpGthWHFrYLKsW4hTsxLREQZ","to_addr":"","amount":"","epoch":28,"ts":1793472390,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1Bgr7pbLobARC2NxSowYdYpGthWHFrYLKsW4hTsxLREQZ","nonce":35,"parents":["f2c601670d44a014a0a06f930507f80d7bb74fd8ef6c581c02e01466c606d72b","2564daa8e92bb0b63630a393754ccc0794cc2c33a92caa9a779d3e77e81612ce"],"ts":1793472390,"epoch":28,"seed":"e98cad97fb651e5b","answer":"Each attestation is a nebula receipt bound to the attester's epoch key, so a cluster of clones attesting each other forms a closed dune loop that the replay detects and discounts to zero. An attacker must as a result acquire 9 genuinely independent identities per alias, which is exactly the cost the mechanism is designed to impose, and the umber tally makes that independence checkable by anyone. Honest users pay that once, farms 36 times. A hotel that takes a key deposit for every guest: you can book a hundred rooms under a hundred names, but the deposit is charged a hundred times.","stamp":5,"sig":"3HZVush7fLAHsRZXGB6r44v53fA1rRyrSocKwnNHfupyiVkkc7s5vWGoRyhnA25Qg92s6szTbbA8jiGNb9EAcY7h"},"checkpointed":{"height":168874,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T23:03:16.011Z","checkpoint_height":168874,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}