Everything should be encrypted, right?

Here's the perfect plan to solve all those pesky security problems. Confidentiality and data leakage, secure backups, individual privacy, data integrity, identity and access management - all can be dealt with in some way by encryption. So why don't we all just use it then, and be done?

Of course encryption is out there, embedded in various technologies – every time we see the key in the browser status bar, open a VPN connection or send a signed email, we're using encryption. But there's a massive gulf between this, embedded use and the broader potential for in-your-face, soup-to-nuts data encryption. For example, we have the fact that while hard disk encryption is now available on a variety of desktop and server platforms, it has yet to see widespread deployment outside of certain verticals.