Cyberterrorism can be defined as the use of information technology by terrorist groups and individuals to further their agenda. This can include use of information technology to organise and execute attacks against networks, computer systems and telecommunications infrastructures, or for exchanging information or making threats electronically. Examples are hacking into computer systems, introducing viruses to vulnerable networks, web site defacing, denial-of-service attacks, or terroristic threats made via electronic communication. This book examines various aspects of this new type of warfare.