[gurabli]

I think you don't have to fully download encrypted content, the encryption decrypt is done on-the-fly.
I am kind a new to this cloud based storage, but getting more and more famiar (i do understan linux). Take a look at the gdrive implememtation of encryption.
As a reference, rclone encryption should be the aim, to be able to decode that with the password and password salt.
It would be certainly very useful, as encryption is always recommended, especially of putting content into cloud.

Your addon is really great, it works like a charm. I hope you will consider this option in near future. I'm here to test if needed.

Edit: to confirm, decrypt is done on-the-fly, no full download is required: Link. I guess gdrive implementation can serve as a reference?