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WASHINGTON — US officials have long considered Huawei, the Chinese telecommunications company, a security threat, blocking it from business deals in the United States for fear that it would create “back doors” in its equipment that could allow the Chinese military or Beijing-backed hackers to steal corporate and government secrets.
But even as the United States made a public case about the dangers of buying from Huawei, classified documents show that the National Security Agency was creating its own back doors — directly into Huawei’s networks.
The agency pried its way into the servers in Huawei’s sealed headquarters in Shenzhen, China’s industrial heart, according to NSA documents provided by former contractor Edward J. Snowden.