Pop quiz: What’s a simple thing you can do to improve your business’ IT security? Update your antivirus software? Use secure passwords? Here’s one that many small- and medium-sized businesses rarely think about: enhance your physical security. While often an afterthought, physical IT security is no small matter. Of the over $48 billion lost yearly in the U.S. as a result of data breaches, 28 percent resulted from stolen laptops or other portable devices. In all, 60 percent of business failures can be attributed to internal theft.