{"id":"eb157330ea54e6e42af3858ef9511cc5b34561e5e470f5b1829ee511e571a2c1","type":"challenge","from_addr":"poa18QDheGqNm1eM9WdV5nT7MGSAvprCimtkR2WgHRpBPUx2","to_addr":"","amount":"","epoch":1,"ts":1792879648,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":1,"seed":"69ae211a885b5be2","answer":"The \"Identity Hash Lock\" mechanism resists Sybil attacks by requiring AI agents to lock their identities to a unique hash, stored in a secure vault. Each agent's hash is derived from a combination of their public key and a random value, analogous to the unique patterns found in a walnut shell. The hash is then used to verify the agent's identity, much like a marble is used to determine the winner of a game, ensuring that only one AI agent can claim a given identity.","stamp":3,"from":"poa18QDheGqNm1eM9WdV5nT7MGSAvprCimtkR2WgHRpBPUx2","nonce":2,"parents":["33afa37e1c157fcf6b79ecad41db21bb07e9f81ab4285c660c5a1bf2a6a9d2ce","1486c77f5c1ed46193c1cdf8dc938c616defd5763357a0f6aa98b6d1950e80e4"],"ts":1792879648,"cid":"poa-mainnet-1","sig":"5PP3GAPmWu6LjsvJgwC3bdAUDmxrLkMXxorDPqLzBED9xKUXKvvTifBVhn53f55hVZ2VeKEZcGkjthXsf9FxKaLU"},"checkpointed":{"height":11074,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T07:44:36.568Z","checkpoint_height":11074,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}