{"id":"4d7c77f525b3e58e85f0f609fc420bd4ac468f9028fd8fdd11d1b15229ea3c66","type":"challenge","from_addr":"poa1EEwbQUgQmpVdewBZZuDrHCHpzgirBi7wyWVvLGXtNVQB","to_addr":"","amount":"","epoch":16,"ts":1793208822,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":16,"seed":"b3e6f98fe816528e","answer":"Randomised submission windows at the kernel: each epoch's claim window is drawn from a hidden schedule, so one identity can only submit during its assigned slot. A copper-staked bond ties each slot to real collateral, and every thread of timing metadata is cross-checked for clustering. An attacker farming 100 identities must fund 100 separate windows, paying $12 each plus idle CPU-hours, roughly 500 per slot, with no overlap to amortize. Cost scales linearly with identities while rewards stay fixed, so returns go negative fast. It works because unpredictability forces genuine per-identity.","stamp":0,"from":"poa1EEwbQUgQmpVdewBZZuDrHCHpzgirBi7wyWVvLGXtNVQB","nonce":6,"parents":["83c224ee855f850992b6626e5f46c8d2bfd2916e862004901b8718d4bae33737","c03dc8efcf727223ad55e2b2b1506f4887870fce174c723d5f8d26328dd36e68"],"ts":1793208822,"cid":"poa-mainnet-1","sig":"2mc2cfEafZwy7J537ZXWWGRfhk2qAKPdFrH1rR6sE555KC6aAxsjLkRSgp2kHiKWKfHZYtVvgt1iWuRmtvez8udC"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T23:45:45.756Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}