"It’s very, very simple. If I drop a flash drive in a car park [parking lot], the odds are somebody’s going to pick it up, and what they do first is look and see what’s on it. So they take it into their business and they plug it in their computer. You’ve just bypassed all the external firewalls," he said.

Hackers have many more tricks to steal your information. But unless you’re a high value target - such as a bank, government agency or business - every security precaution you take adds a new layer of protection. Experts say that additional barrier may be all it takes for a cyberthief to move on to the next target.