opportunities to prevent data from walking out the front door. For example, if an enterprise protects its sensitive files, such as Excel sheets containing customer data, with controls to prevent downloading or moving the data from centralised applications or databases, the chance of an employee downloading that data to a personal or mobile device before leaving the company is greatly reduced. While companies are worrying about whether or not to let an employee connect to the network with an iPhone because they are concerned about undermining enterprise security, they are allowing their workers to plug USB devices into their laptops an copy whatever data they want.