Universal Serial Bus (USB) devices are high transmission speed external devices. USB is the speediest external device available today. The access to USB is very simple, convenient and fast compared to other external devices such as CD, DVD, floppy drive, etc. Thus, USB have become most popular interface standard for hardware connection. But, from security point of view, USB devices lacks security as no user is restricted to access USB device. If the authors restrict the use of USB devices, then the data access through external devices would be as chaotic as before.