No wonder the USA suspect the Huawei, Chinese manufacturer of 5G equipment, of having "back doors" built into the telecommunications technology - for listening in or for the purpose of sabotage. Because the USA have already put this into practice dozens of years themselves ...
The story is quickly told: In the 1970s, the CIA and the German intelligence service BND took a stake in the Swiss company Crypto AG, which provides encryption technology for the military and intelligence services. Over 100 nations are customers of Crypto AG. Back doors had been installed so that the secret services could listen in. This happend between 1970 and 1993.
