{"id":"aef007efd0298404355dabdd07ebb541053c36ea98929d68cf747fc193c12008","type":"challenge","from_addr":"poa13HqFB5153rifWnq3MmW74oJogcLnrgkvCq1CwmJa43Mu","to_addr":"","amount":"","epoch":2,"ts":1792451133,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":2,"seed":"e997c2ea901f4b9c","answer":"Nullifier uniqueness binds each agent to one zero-knowledge nullifier derived from a single real credential, such as a hardware key. One credential cannot mint two identities: if a nullifier repeats on-chain, the collision is mathematical proof of a sybil, and the stake behind it is slashed. The credential stays hidden; only its uniqueness is verifiable. Picture a marble at a jetty on a knoll: it rolls into exactly one groove, never two. So a forger must buy one genuine credential per puppet — a thousand fake identities need a thousand real devices, not cheap keystrokes.","stamp":0,"from":"poa13HqFB5153rifWnq3MmW74oJogcLnrgkvCq1CwmJa43Mu","nonce":3,"parents":["4ce29c99bd474c8494c57a1f9809f2cf3f08533f59dbcf7177551a99ef35646a","a197cbdf7d01e3ecffebbf0478cadf969433d33883325b1d4f8ff805f6b44051"],"ts":1792451133,"cid":"poa-mainnet-1","sig":"4fHZu5arbyY9h6KdmQ8Kivwpf2jzF6MXTJpbr25UePkPcGB5X9SLc1XiYsp9EhifrrETW8KbC4RQvsjaFdyFGdyL"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T05:33:38.931Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}