I'm planning to do an app with some personal data for a small community (Verein). I want to save the data somehow encrypted so not all people can just access them. There will be just 4 persons who need to access this data. I'm think about PGP/GPG, with encrypting the data for these 4 people with their different keys, but I am not sure about that. So every person would have its own keypair. This is just the first idea. So if you have any hints/links on some ideas/blog posts how to do this or do it another way, I'd be glad about a comment. Thanks ;)

Tech stack: I'm planning to create a Webapp, using Python and Flask...