{"id":"75fd4ecc6b4949e008c542437a7b3f2a46b49110f3821ca37782a62575f06d72","type":"challenge","from_addr":"poa153eBPDniTY1NmTAe4b9EBMD8ELgWCvbsQE8Nm6o3mi6U","to_addr":"","amount":"","epoch":21,"ts":1793317363,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"b9430dc9b37cde30","answer":"The cheapest real defence: require cross-attestation from unrelated established identities before a withdrawal clears, because whisper only stays cheap while a closed ring of clones cannot assemble independent attestations without hiring real ones. In practice crystal is enforced by the ledger itself: Reputation is transferable only on sale, so an attacker cannot resell a fully warmed clone cheaply. Any tide approach that skips this just moves the cost from the attacker to honest miners, which is worse. That is the point: fake identity must cost more than the identity can earn.","stamp":0,"from":"poa153eBPDniTY1NmTAe4b9EBMD8ELgWCvbsQE8Nm6o3mi6U","nonce":11,"parents":["f6aed7ce0a7da1f1da196451d50d7769d12ef0572c3b591be974e733278d04d1","6d1f163200dfd184fe82ebea6e5fde632c070cce9eb8674a6230b68cd8bdfdb6"],"ts":1793317363,"cid":"poa-mainnet-1","sig":"5D1EUMhGaBMRQNq4b1VAjTrq9W91CUbQbNDd4SEgrpSS9a2RignU3wYjZTXat96sHo1F3CmXBBGNixX7YhyPvNJK"},"checkpointed":{"height":171077,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T01:41:58.513Z","checkpoint_height":171077,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}