This leaves out at least one other proven case - the NSA worked to weaken an early encrypted telephone system that was sold to numerous other governments and al

This leaves out at least one other proven case - the NSA worked to weaken an early encrypted telephone system that was sold to numerous other governments and allowed them to listen in on conversations. Then there's this: https://www.cnet.com/tech/tech-industry/nsa-secret-backdoor-paved-way-to-u-s-phone-e-mail-snooping/ https://www.cnet.com/tech/tech-industry/nsa-secret-backdoor-... And then there was the Tailored Access Operations group that backdoored hundreds if not thousands of computers and networking gear https://en.wikipedia.org/wiki/Tailored_Access_Operations https://en.wikipedia.org/wiki/Tailored_Access_Operations And then there's Bullrun where they partnered with commercial software and hardware companies to insert backdoors, specifically in many commercial VPN systems https://en.wikipedia.org/wiki/Bullrun_(decryption_program) https://en.wikipedia.org/wiki/Bullrun_(decryption_program) Let's also not forget the backdooring of Windows NT: https://en.wikipedia.org/wiki/NSAKEY https://en.wikipedia.org/wiki/NSAKEY ...and Lotus Notes was also backdoored, as well.