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Geedge and MESA leak: Analyzing the great firewall’s largest document leak
The Great Firewall of China (GFW) experienced the largest leak of internal documents in its history on Thursday September 11, 2025. Over 500 GB of source code, work logs, and internal communication records were leaked, revealing details of the GFW's research, development, and operations.
The leak originated from a core technical force behind the GFW: Geedge Networks (whose chief scientist is Fang Binxing) and the MESA Lab at the Institute of Information Engineering, Chinese Academy of Sciences. Due to the highly sensitive nature of these leaked materials, we strongly advise anyone who chooses to download and analyze them to take proper operational security precautions. At the end of 2008, he established the National Engineering Laboratory for Information Content Security (NELIST), initially based at the Institute of Computing Technology, Chinese Academy of Sciences.
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