I know the article explicitly and consistently says 'encryption' everywhere. I simply cannot fathom that they were encrypting instead of hashing. While I suppose it's possible that the SHA-1 versions were encrypted, I refuse to believe that the dropbox security team would transition from that to bcrypt 2-directional encryption over bcrypt 1-directional hashing. With that assumption I find it safe to say the tech journalist is being inaccurate.