The term cyberterrorism is being used with increasing frequency today. Since widespread concern with cyberterrorism is relatively new, understanding of the term is somewhat limited. Government officials and experts are often heard claiming that the world is unprepared for cyberterrorism; however, other officials and experts state that cyberterrorism does not pose a threat to anyone. Examines the reasons for these disparate viewpoints and reviews the theoretical and actual forms in which cyberterrorism may occur. Further, proposes the use (and refocusing) of an existing model of computer security to help understand and defend against cyberterrorism.