"For many, the Internet has become inextricably intertwined with daily life. Many rely on it to perform their jobs, pay their bills, send messages to loved ones, track their medical care, and voice political opinions, among a host of other activities. Likewise, government and business use the Internet to maintain defense systems, protect power plants and water supplies, and keep other types of critical infrastructure running. Consequently, the federal government's role in protecting U.S. citizens and critical infrastructure from cyber attacks has been the subject of recent congressional interest. This report discusses selected legal issues that frequently arise in the context of legislation to address vulnerabilities of private critical infrastructure to cyber threats, efforts to protect government networks from cyber threats, and proposals to facilitate and encourage sharing of cyber threat information amongst private sector and government entities. This report also provides an overview of the ways in which federal laws of these types may preempt or affect the applicability of state law."
CRS Report for Congress, R42409