One concept common to all computer users is data storage. Sometimes storage occurs on a file server and sometimes on movable media, allowing it to be transported between machines. Moving storage media represents a security risk from a couple of angles, the first being the potential loss of control over the data on the moving media. Second is the risk of introducing unwanted items, such as a virus or a worm, when the media are attached back to a network. Both of these issues can be remedied through policies and software. The key is to ensure that they are occurring. To describe mediaspecific issues, the media can be divided into three categories: magnetic, optical, and electronic.
Magnetic media store data through ...