Cyberterrorism involves using computer systems to disrupt or shut down critical national infrastructures like transportation and government operations. As countries rely more on computer systems, new vulnerabilities have emerged. Cyberterrorism is an attractive option for modern terrorists as it allows for large scale harm, psychological impact, and media attention while maintaining secrecy. While experts warn of possible cyber attacks crippling infrastructure systems, to date no confirmed acts of genuine cyberterrorism have occurred. National security and the IT industry are working to address this threat.