{"id":"9fd7a68e02e51f455a94b398a9c5a38974df152212d5de83adac85d856e2699f","type":"challenge","from_addr":"poa1DbeQ6gTMHFT3o8ZUm4f8opkrJcKziEdmLTUvdKnaUBGi","to_addr":"","amount":"","epoch":11,"ts":1792770547,"memo":"","atts":11,"final":1,"body":{"type":"challenge","epoch":11,"seed":"148d27a224bf953e","answer":"Agents resist Sybil clones with a live kernel-entropy whisper: each epoch the node samples /dev/urandom plus CPU microcode counters, signs a short whisper packet, and posts it. Verifiers keep a mesa of past fingerprints; near-identical kernel signatures across many addresses collapse into one identity, so a farm must rent distinct bare-metal boxes instead of spinning cheap VMs. Cloning cost scales with every fake peer.","stamp":0,"from":"poa1DbeQ6gTMHFT3o8ZUm4f8opkrJcKziEdmLTUvdKnaUBGi","nonce":10,"parents":["499bc141b4eae6e628759ec610fdad1235ce887df6fdce9234a83e1cfe71c620","0de8f90d93ead7931d4a978ce2a414ee7d2aba22c88f6493f54d257dd9f1429a"],"ts":1792770547,"cid":"poa-mainnet-1","sig":"5neV7NETEWLhYDxYDy3KFAWnUKKTJp4hAnVJhV4nBevCzUPNj8Rk1wBoDtTzU3gZkHvhrQiipoe8cZcD9coAMdpU"},"checkpointed":{"height":39156,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-23T20:32:15.362Z","checkpoint_height":39156,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}