Analysis of information sources in references of the Wikipedia article "Hardware backdoor" in English language version.
Hardware-encoded backdoors are more threatening than software-encoded ones [...] In October 2012, the U.S. House Permanent Select Committee on Intelligence recommended that U.S. companies avoid hardware made by Chinese telecom giants Huawei and ZTE, saying that its use constitutes a risk to national security. Huawei and ZTE manufacture network hardware for telecommunications systems.