Comment Comment by utf_8x Once again - Signal[0] as an alternative. It's fully Open-Source (including the backend) and their crypto is public and independently verified[1][2][3]...[0] https://signal.org/en/[1] https://en.wikipedia.org/wiki/Signal_(software)#Encryption_p...[2] https://threatpost.com/signal-audit-reveals-protocol-cryptog...[3] https://eprint.iacr.org/2016/1013.pdf [PDF] parent utf_8x 5 years ago
[0] https://signal.org/en/
[1] https://en.wikipedia.org/wiki/Signal_(software)#Encryption_p...
[2] https://threatpost.com/signal-audit-reveals-protocol-cryptog...
[3] https://eprint.iacr.org/2016/1013.pdf [PDF]