I wish somebody would create some scheme to like self host the backend of an app.. like you launch Signal and it has a button to type in the name of your own server, where that server runs a VM that you configure and setup on your own PC locally then upload to AWS or something and has some facility to constantly report to you the hash of the memory and disk contents, along with some contract from AWS that states that Amazon cannot alter the results of the hash function results sent to you under any circumstances. Plus there would be some facility to validate the contents of what runs in that VM at any instant in time. Basically the idea is you can’t trust anybody at all. I guess pgp would maybe solve this for direct messaging?