Can I change my encryption key? 🗝

You can change your encryption key in your account settings.

We recommend that you use a strong key. Something you can remember and type easily, but hard to guess or something that can't be found in a dictionary. 

Important: If you ever lose or forget your encryption key, your files will be forever inaccessible. To keep your data safe, there is no way to recover this key or your files.

Here's a relevant XKCD comic for you.