Depends, can I encrypt my data before I back it up with them? I am reasonably satisfied with PGP/GPG. I don't assume that they absolutely cannot crack it, but

Depends, can I encrypt my data before I back it up with them? I am reasonably satisfied with PGP/GPG. I don't assume that they absolutely cannot crack it, but I am confident enough that it is expensive to do. I would be willing to back up some of my data with them, after encrypting it. (Mostly stuff the IRS could get anyway).