Hey, let's say i have some images of a nice UFO's and i want them to be protected in the cloud without any witness. Best practices for that? Thanks for answer.
All you need to do is encrypt the shit out of them, not give anybody the key, and then post them all over the fucking place. Each of these steps are trivial. Just do all three of them and you're golden.
Use PGP. The free version is called GPG. https://www.gnupg.org/
Invented in the 80s. To this day, considered the best way to have data at rest.
Then just upload it to Mega.nz or something.