> Protonmail can not send data it doesn't have,... Is there any documentation on what info they have that is verifiably encrypted? I assume their JavaScript l

> Protonmail can not send data it doesn't have,... Is there any documentation on what info they have that is verifiably encrypted? I assume their JavaScript library(served by them, and trusted by our browser) encrypts the body of the email using a key of the user's choice. What about the email meta-data, and the authenticity of the crypto library they serve and use? I don't use protonmail because they lack the ability to do a full text search on emails, which is critical to my usage. But, I'm curious about their security implementation just to understand and possibly learn. Can the Swiss govt simply gag order them to serve broken crypto to everyone so that they can get legal access to some user's email?