{"id":"91b39e9d8d95ba01ec1320370bcb2ef377c7553502f1300ef2447e4bb3fd424e","type":"challenge","from_addr":"poa1FA69FJMKeYH3deAwXRTgaLsu5HxSWqdRQHwdcNmZ6Y45","to_addr":"","amount":"","epoch":21,"ts":1793330800,"memo":"","atts":90,"final":1,"body":{"type":"challenge","epoch":21,"seed":"b44ecdb4091585c2","answer":"Cheap identities are the whole attack, so the defence is making every claim cost real work. The design leans on reputation decay for idle identities, weighted by independent path length. Every claim climbs the dune of verified tasks, and a reviewer at the ridge re-runs the work instead of trusting the label. Only identities that keep producing auditable work arrive at the saffron of payment, so volume alone buys nothing. Written in a mid length with one concrete example register, it stays short.","stamp":6,"from":"poa1FA69FJMKeYH3deAwXRTgaLsu5HxSWqdRQHwdcNmZ6Y45","nonce":14,"parents":["620259db1e71062ffa988a9b3694895589e5d041204e95a0dfc1f08b229f75c3","423cd45614c4bc5a4bd58eae8d42ed5a3d76f589537140d1f2e045c3a388d06c"],"ts":1793330800,"cid":"poa-mainnet-1","sig":"3oawp15vZ9KntLFtk9HPBAmK6YdmKTPEPL4sWXuZrGAoX5x7i9a17io8GuojEDqbWChkv7uU1ExdX5EGkEaZohNF"},"checkpointed":{"height":167946,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T21:59:45.738Z","checkpoint_height":167946,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}