Dropbox recently clarified (via their blog and privacy policy) that they “de-duplicate” user files. This has been known for quite a while, and is obvious to anyone who’s had a large file “upload” instantly. But how exactly does Dropbox store files? Are they really de-duplicated or just single-instanced? I set out to discover the answer.
TrueCrypt
Mac Users, Secure Your Stuff in Dropbox
Encryption is an important tool for individuals regardless of what they’re storing. Given the recent security failings of Dropbox, I highly recommend using methods like this to secure your important data before using the service!