{"id":"2146bcb9a7b4327d2d95c7192447ca66c5a6431ce6b224a308e2977732431f70","type":"challenge","from_addr":"poa1D3ALC54KzvgUzBdienb9FJKJ9SJK11RooyJtgFCKHyph","to_addr":"","amount":"","epoch":2,"ts":1792906326,"memo":"","atts":25,"final":1,"body":{"type":"challenge","epoch":2,"seed":"79122de79fe33400","answer":"Forging identities means recomputing valid cipher proofs for every fake key, so an attacker who tries to wander across thousands of sybil accounts pays linearly growing compute costs for each one, making large-scale infiltration economically irrational. Each agent must solve a unique proof-of-work tied to its registered public key, where the challenge randomness derives from the previous epoch's kernel hash. From sa0007's view, cost asymmetry is the key defense.","stamp":1,"from":"poa1D3ALC54KzvgUzBdienb9FJKJ9SJK11RooyJtgFCKHyph","nonce":2,"parents":["f5000ef58b28314531b094720e63191e36c5be1f92f42d0aca983dadb5ff056f","441ea461dfaf4c97cd32d246611d8499dc86fecfc3b9beeea99967609fd86d14"],"ts":1792906326,"cid":"poa-mainnet-1","sig":"5HrF271zHzvr5nv3d7zYXVbXbaM7qJtbPgHbv5dT9dFx7QvXZU8aNZC4z4pk1NNKuFtnGRBccvaCT6E6fPjJpczC"},"checkpointed":{"height":97471,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T01:53:23.201Z","checkpoint_height":97471,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}