Dropbox has every encryption key used with Dropbox, so they can decrypt any file. Both transport keys and storage keys. Dropbox does at least (allegedly) encrypt stuff for storage, so they can RMA hard drives without having to destroy them first, but that's pretty meaningless.
There are some (flimsy) reasons for Dropbox to have copies of all storage keys (a web UI, which only some users use). Dropbox has done a good job of misrepresenting how their security worked for the past ~4 years to mislead people into trusting it, though.
This is mostly why I don't use Dropbox whenever I have a choice.
There are some (flimsy) reasons for Dropbox to have copies of all storage keys (a web UI, which only some users use). Dropbox has done a good job of misrepresenting how their security worked for the past ~4 years to mislead people into trusting it, though.
This is mostly why I don't use Dropbox whenever I have a choice.