Definition:

Cyberterrorism does not have a standard definition, and has not been well distinguished from other cyber crimes, such as the work of hackers or "hacktivism."

Dorothy Denning offered a definition in testimony before the House Armed Services Committee in 2000 that clarifies cyberterrorism:

Cyberterrorism is the convergence of cyberspace and terrorism. It refers to unlawful attacks and threats of attacks against computers, networks and the information stored therein when done to intimidate or coerce a government or its people in furtherance of political or social objectives. Further, to qualify as cyberterrorism, an attack should result in violence against persons or property, or at least cause enough harm to generate fear. Attacks that lead to death or bodily injury, explosions, or severe economic loss would be examples. Serious attacks against critical infrastructures could be acts of cyberterrorism, depending on their impact. Attacks that disrupt nonessential services or that are mainly a costly nuisance are not. (Quoted in Gabriel Weimann, "Cyberterrorism: How Real is the Threat?" )