Chances are you lock your door when you leave home, don't leave the keys in the ignition when you run into the 7-Eleven for milk and have at least some kind of security software on your computer.

But what about your smart phone?

For many people, a phone these days is a mobile office crammed with valuable contacts, a digital wallet from which you buy songs on iTunes or shoes on Amazon, and a portal to your online bank account.

Rather than locking the phones like bank vaults, most smart phone owners treat their devices with as much concern as they do Monopoly money.