Cybersecurity: Continued Attention Needed to Protect Our Nation's Critical Infrastructure, Statement of Gregory C. Wilshusen, Director, Information Security Issues, Testimony Before the Subcommittee on Oversight and Investigations, Committee on Energy and Commerce, House of Representatives [open pdf - 312KB]
From the Highlights: "Increasing computer interconnectivity, such as the growth of the Internet, has revolutionized the way our government, our nation, and much of the world communicate and conduct business. However, this widespread interconnectivity poses significant risks to the government's and the nation's computer systems, and to the critical infrastructures they support. These critical infrastructures include systems and assets--both physical and virtual--that are essential to the nation's security, economic prosperity, and public health, such as financial institutions, telecommunications networks, and energy production and transmission facilities. Because most of these infrastructures are owned by the private sector, establishing effective public-private partnerships is essential to securing them from pervasive cyber-based threats. Federal law and policy call for federal entities, such as the Department of Homeland Security (DHS), to work with private-sector partners to enhance the physical and cyber security of these critical infrastructures."
Government Accountability Office: http://gao.gov