I want to store files on my server to avoid google cloud and other services.
I’m looking for FOSS software.
I want all the files to be encrypted client side with a masterpassword via an app or a web interface, the server must not have access to them.
An included android app for uploading and downloading would be nice.
I guess what I’m looking for is some kind of FTP server?
because the server could be compromised
It’s not easy as you may think, if you use a VPN, a secure router and follow common security practices for nextcloud, SSH and the like. If someone can access your server with those thing in place you would have a lot more to worry. IMHO a selfhosted nextcloud works better without encryption, without high risks. Of course if your threat model call for it, encrypt whatever you need, but common users are going to lose too much for nearly no gain
why would it work better without encryption? I don’t see any loss in having client side encryption tbh. common security practices are cool but there are new security vulnerabilities everyday.
Nextcloud encryption isn’t perfect, and you will lose some functionality (e.g. image preview). You could think about encrypting only what you think is particularly sensible, with something like cryptomator
Could try setting up a VPN like Wireguard…
A VPN provides absolutely no protection against a compromised server.
what?