[nc17]

These are good points. However, as a user of Dropbox I just don't care if they encrypt my data or not. If I back up anything sensitive, I encrypt it myself. For stuff that's not that private (e.g. pictures that I've shared) I assume that anyone at Dropbox could look at them.

[andybak]

It's more than just your data. The other service similar to tidy.io that recently launched managed to leak people's private AWS keys.