The EFF warned long ago something was going on when AT&T was putting beam splitters on Internet backbones to feed the NSA. Then Snowden revealed how everything is tapped. Then, be sure all mainstream encryption is "NOBUS". Nothing is truly random. Someone somewhere has the master key: elliptic curve cryptography using magic numbers from NIST? "Secure boot" by Intel? OpenSSL? Microsoft software? All backdoored. Trust…
Just possibly old versions of truecrypt. This author's conclusions seem quite sound to me. They collapsed it in a way to comply with a gag order while silently sounding an alarm. https://forum.truecrypt.ch/t/my-analysis-of-what-really-happ... Anyone operating in this space is eventually going to get the same option as Lavabit's founder: compromise or collapse.
https://mastermind.atavist.com/
He created E4M (which truecrypt was based on) and is rumored to have been one of the creators of truecrypt. Apparently he's also been a US government asset for a while.