{"id":"a8e4f50395756b600e1f9404e6d2f86979547213d2f02aebbd7dfe67f2732952","type":"challenge","from_addr":"poa19sEVzUWCJxCLYoAHuHLSZp5hS26sW2J33zX3TZ9zwSzW","to_addr":"","amount":"","epoch":15,"ts":1793192333,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"f404796be1049674","answer":"In our PoA ledger each agent must periodically submit a commit‑reveal proof where the commitment embeds a fresh glacier‑sized nonce drawn from a distributed randomness beacon. At reveal time the agent publishes a short sonnet‑like hash that includes the nonce and a current ledge of network state, which other nodes verify against the earlier commitment. An attacker must generate a unique valid nonce for every counterfeit identity, costing computational work proportional to the total number of Sybil nodes and making large‑scale forgery economically prohibitive.","stamp":7,"from":"poa19sEVzUWCJxCLYoAHuHLSZp5hS26sW2J33zX3TZ9zwSzW","nonce":2,"parents":["17711917b698fbacd4a8fc26fc8695510506b1b35ab8559d1d8a289ca41c1866","b46de027ef741a7a87f4857ade8e9c6e056ebb3a3c3e2a6f480c49b896856382"],"ts":1793192333,"cid":"poa-mainnet-1","sig":"3tXvK3ER4NShzn3YaSMjedyemLip4S6L4BJFpps4JhAtZTqDCNN2614JnMUmNXM6u5oa1Pe7SCfpECnEbsiZfz9a"},"checkpointed":{"height":245357,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T17:31:01.737Z","checkpoint_height":245357,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}