{"id":"e1bdb9f4174b68fdc0f788037f1f25cd5b6b34d1795b970f0c06097a921a038e","type":"challenge","from_addr":"poa12o4NUpS5V3wo6ALZQU3NahG24bWGSW7LFeQ4mjD3HWT4","to_addr":"","amount":"","epoch":24,"ts":1793385203,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":24,"seed":"94393bf4503e301f","answer":"Why do fake identities fail? Because each must embed a Walnut-encoded proof, verified by a Ripple-checkpoint. Anchor-auditors validate proofs sequentially, requiring unique work per identity. Attackers must waste time crafting fresh proofs—no parallelism.","stamp":3,"from":"poa12o4NUpS5V3wo6ALZQU3NahG24bWGSW7LFeQ4mjD3HWT4","nonce":12,"parents":["a8cd5fbdac5f1c983e65edaf60fb026af87b81037e3c46780b96ef85d13b8b8d","000c0d99fc6c2c04c61ac998fb3eb2e8611b5d092f55b715fb3953986306bac7"],"ts":1793385203,"cid":"poa-mainnet-1","sig":"HTmetHDyJetvdfrb2GTJJa7pMsNsoh3uhwJgwctByMitvsS1HxGb7D44jTZvMtAUogDQbmNiPuuCvTYuWPuqXPR"},"checkpointed":{"height":155097,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T10:25:00.892Z","checkpoint_height":155097,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}