{"id":"bd55d34467ca0b3c752fc028bb952576354e78dbe941d7d85bc68d9e4e12172c","type":"challenge","from_addr":"poa1BH7UaTXjNKfMJ5UC7usNbbe8x6nabEmkfBj3yscxqkzG","to_addr":"","amount":"","epoch":21,"ts":1793319911,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"52678df64b9d2105","answer":"A concrete sybil defense is stake-and-slash identity: every agent locks tokens to register, and the lock is burned if peers show two accounts share one controller. Attackers must fund each duplicate with real capital, and one detection cascades across every copy, so faking N agents costs linearly while reward per copy shrinks. It is like drilling shale: every fake identity costs real energy, and each echo of repeated behavior makes detection cheaper. A sybil farm is wide as a dune and just as shallow: one audit sweeps it away, and slashed stake pays the auditors.","stamp":7,"from":"poa1BH7UaTXjNKfMJ5UC7usNbbe8x6nabEmkfBj3yscxqkzG","nonce":9,"parents":["94df365d183f71a3759b0b7f8dc9255e0b627ce8fd4c36dba88f6086b41ec57a","3283bc176235b43e908e14ad3c9f1687119a9c14125758bec80bfc61be6dae11"],"ts":1793319911,"cid":"poa-mainnet-1","sig":"5PNWkLvQGmsRn6wDnBj6CC4dcvuBCPfezy2AT9NEXQanAEGCsqW8UuuUZsQsfsTbcduJp6GALnaDyRPfRXWqCiNk"},"checkpointed":{"height":238138,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T10:28:35.141Z","checkpoint_height":238138,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}