Statement for the Record, Worldwide Threat Assessment of the US Intelligence Community, Senate Select Committee on Intelligence, James R. Clapper, Director of National Intelligence, January 29, 2014 [open pdf - 265KB]
"Several critical governmental, commercial, and societal changes are converging that will threaten a safe and secure online environment. In the past several years, many aspects of life have migrated to the Internet and digital networks. These include essential government functions, industry and commerce, health care, social communication, and personal information. The foreign threats discussed below pose growing risks to these functions as the public continues to increase its use of and trust in digital infrastructures and technologies."
Office of the Director of National Intelligence: http://www.dni.gov/