The Internet is a vast network of interconnected networks that is used by governments, businesses, research institutions, and individuals around the world to communicate, engage in commerce, do research, educate, and entertain. From its origins in the 1960s as a research project sponsored by the U.S. government, the Internet has grown increasingly important to both American and foreign businesses and consumers, serving as the medium for hundreds of billions of dollars of commerce each year. The Internet has also become an extended information and communications infrastructure, supporting vital services such as power distribution, health care, law enforcement, and national defense. Today, private industry— including telecommunications companies, cable companies, and Internet service providers—owns and operates the vast majority of the Internet’s infrastructure. In recent years, cyber attacks involving malicious software or hacking have been increasing in frequency and complexity. These attacks can come from a variety of actors, including criminal groups, hackers, and terrorists. Federal regulation recognizes the need to protect critical infrastructures such as the Internet. It directs federal departments and agencies to identify and prioritize critical infrastructure sectors and key resources and to protect them from terrorist attack. Furthermore, it recognizes that since a large portion of these critical infrastructures is owned and operated by the private sector, a public/private partnership is crucial for the successful protection of these critical infrastructures. Federal policy also recognizes the need to be prepared for the possibility of debilitating disruptions in cyberspace and, because the vast majority of the Internet infrastructure is owned and operated by the private sector, tasks DHS with developing an integrated public/private plan for Internet recovery. In its plan for protecting critical infrastructures, DHS recognizes that the Internet is a key resource composed of assets within both the information technology and the telecommunications sectors. It notes that the Internet is used by all critical infrastructure sectors to varying degrees and provides information and communications to meet the needs of businesses and government. In the event of a major Internet disruption, multiple organizations could help recover Internet service. These organizations include private industry, collaborative groups, and government organizations. Private industry is central to Internet recovery because private companies own the vast majority of the Internet’s infrastructure and often have response plans. Collaborative groups—including working groups and industry councils—provide information-sharing mechanisms to allow private organizations to restore services. In addition, government initiatives could facilitate response to major Internet disruptions. Federal policies and plans assign DHS lead responsibility for facilitating a public/private response to and recovery from major Internet disruptions. Within DHS, responsibilities reside in two divisions within the Preparedness Directorate: the National Cyber Security Division (NCSD) and the National Communications System (NCS). NCSD operates the U.S. Computer Emergency Readiness Team (US-CERT), which coordinates defense against and response to cyber attacks. The other division, NCS, provides programs and services that assure the resilience of the telecommunications infrastructure in times of crisis. Additionally, the Federal Communications Commission can support Internet recovery by coordinating resources for restoring the basic communications infrastructures over which Internet services run. For example, after Hurricane Katrina, the commission granted temporary authority for private companies to set up wireless Internet communications supporting various relief groups; federal, state, and local government agencies; businesses; and victims in the disaster areas. Prior evaluations of DHS’s cybersecurity responsibilities have highlighted issues and challenges facing the department. In May 2005, we issued a report on DHS’s efforts to fulfill its cybersecurity responsibilities. We noted that while DHS had initiated multiple efforts to fulfill its responsibilities, it had not fully addressed any of the 13 key cybersecurity responsibilities noted in federal law and policy. We also reported that DHS faced a number of challenges that have impeded its ability to fulfill its cyber responsibilities. These challenges included achieving organizational stability, gaining organizational authority, overcoming hiring and contracting issues, increasing awareness of cybersecurity roles and capabilities, establishing effective partnerships with stakeholders, achieving two-way information sharing with stakeholders, and demonstrating the value that DHS can provide. In this report, we also made recommendations to improve DHS’s ability to fulfill its mission as an effective focal point for cybersecurity, including recovery plans for key Internet functions. DHS agreed that strengthening cybersecurity is central to protecting the nation’s critical infrastructures and that much remained to be done, but it has not yet addressed our recommendations. The Internet’s infrastructure is vulnerable to disruptions in service due to terrorist and other malicious attacks, natural disasters, accidents, technological problems, or a combination of the above. Disruptions to Internet service can be caused by cyber and physical incidents—both intentional and unintentional. Recent physical and cyber incidents have caused localized or regional disruptions, highlighting the importance of recovery planning. However, these incidents have also shown the Internet as a whole to be flexible and resilient. Even in severe circumstances, the Internet has not yet suffered a catastrophic failure. To date, cyber attacks have caused various degrees of damage. For example, in 2001, the Code Red worm used a denial-of-service attack to affect millions of computer users by shutting down Web sites, slowing Internet service, and disrupting business and government operations. In 2003, the Slammer worm caused network outages, canceled airline flights, and automated teller machine failures. Slammer resulted in temporary loss of Internet access to some users, and cost estimates on the impact of the worm range from $1.05 billion to $1.25 billion. The federal government coordinated with security companies and Internet service providers and released an advisory recommending that federal departments and agencies patch and block access to the affected channel. However, because the worm had propagated so quickly, most of these activities occurred after it had stopped spreading. In 2002, a coordinated denial-of-service attack was launched against all of the root servers in the Domain Name System. At least nine of the thirteen root servers experienced degradation of service. However, average end users hardly noticed the attack. The attack became visible only as a result of various Internet health-monitoring projects. The response to the attacks was handled by the server operators and their service providers. The attack pointed to a need for increased capacity for servers at Internet exchange points to enable them to manage the high volumes of data traffic during an attack. If a massive disruptive attack on the domain name server system were successful, it could take several days to recover from. According to experts familiar with the attack, the government did not have a role in recovering from it. Like cyber incidents, physical incidents could affect various aspects of the Internet infrastructure, including underground or undersea cables and facilities that house telecommunications equipment, Internet exchange points, or Internet service providers. For example, on July 18, 2001, a 60- car freight train derailed in a Baltimore tunnel, causing a fire that interrupted Internet and data services between Washington and New York. The tunnel housed fiber-optic cables serving seven of the biggest U.S. Internet service providers. The fire burned and severed fiber optic cables, causing backbone slowdowns for at least three major Internet service providers. Efforts to recover Internet service were handled by the affected Internet service providers; however, local and federal officials responded to the immediate physical issues of extinguishing the fire and maintaining safety in the surrounding area, and they worked with telecommunications companies to reroute affected cables. In addition, Hurricane Katrina caused substantial destruction of the communications infrastructure in Louisiana, Mississippi, and Alabama, but it had minimal affect on the overall functioning of the Internet outside of the immediate area. According to an Internet monitoring service provider, while there was a loss of routing around the affected area, there was no significant impact on global Internet routing. According to the Federal Communications Commission, the storm caused outages for over 3 million telephone customers, 38 emergency 9-1-1 call centers, hundreds of thousands of cable customers, and over 1,000 cellular sites. However, a substantial number of the networks that experienced service disruptions recovered relatively quickly. Federal officials stated that the government took steps to respond to the hurricane, such as increasing analysis and watch services in the affected area, coordinating with communications companies to move personnel to safety, working with fuel and equipment providers, and rerouting communications traffic away from affected areas. However, private-sector representatives stated that requests for assistance, such as food, water, fuel, and secure access to facilities were denied for legal reasons; the government made time-consuming and duplicative requests for information; and certain government actions impeded recovery efforts. Since its inception, the Internet has experienced disruptions of varying scale—including fast-spreading worms, denial-of-service attacks, and physical destruction of key infrastructure components—but the Internet has yet to experience a catastrophic failure. However, it is possible that a complex attack or set of attacks could cause the Internet to fail. It is also possible that a series of attacks against the Internet could undermine users’ trust and thereby reduce the Internet’s utility. Several federal laws and regulations provide broad guidance that applies to the Internet infrastructure, but it is not clear how useful these authorities would be in helping to recover from a major Internet disruption because some do not specifically address Internet recovery and others have seldom been used. Pertinent laws and regulations address critical infrastructure protection, federal disaster response, and the telecommunications infrastructure. Specifically, the Homeland Security Act of 2002 and Homeland Security Presidential Directive 7 establish critical infrastructure protection as a national goal and describe a strategy for cooperative efforts by the government and the private sector to protect the physical and cyber-based systems that are essential to the operations of the economy and the government. These authorities apply to the Internet because it is a core communications infrastructure supporting the information technology and telecommunications sectors. However, this law and regulation do not specifically address roles and responsibilities in the event of an Internet disruption. Regarding federal disaster response, the Defense Production Act and the Stafford Act provide authority to federal agencies to plan for and respond to incidents of national significance like disasters and terrorist attacks.