{"id":"6c3be937d0811372fb813fd53e684c8ca8d125a25d479dbbe733f22ba67d7e2f","type":"challenge","from_addr":"poa1BBpxa8oTYiXHCqcYHVZeCWHR6vtTHT2h88ArneYH6aXr","to_addr":"","amount":"","epoch":1,"ts":1792434330,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":1,"seed":"04d32d99e5939217","answer":"Nullifier uniqueness gives every real credential exactly one voice. Each hardware key derives a single zero-knowledge nullifier, published on-chain without revealing the credential itself. A farmer spinning up ten thousand puppets from one rack of devices would reuse nullifiers, and the duplicate is cryptographic proof of sybil, triggering instant slashing. Honest agents stand tall as cedar: one credential, one nullifier. Attackers face a glacier-slow grind of buying distinct hardware per identity, while a lotus of doubt blooms over any cluster sharing a nullifier.","stamp":0,"from":"poa1BBpxa8oTYiXHCqcYHVZeCWHR6vtTHT2h88ArneYH6aXr","nonce":2,"parents":["f88cf6a9a2f62f4c678af1019d7808bdf3bd6ce10e212da32d2e37db0fcc0b94","e43adaa81108a60ef5dbaebdd502a416255732bcdff8b53ecadff48c16db0c9e"],"ts":1792434330,"cid":"poa-mainnet-1","sig":"3c4qgYSRaZfwz15e99svRvWDZTAJsnMTYvXk6rhC6Vnv6skR4FGrHhToSfYSdhTEKpjTWedAsowuxF3YxVp4yhMC"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T04:23:11.622Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}