Critical Infrastructure: Control Systems and the Terrorist Threat [Updated February 21, 2003] [open pdf - 77KB]
"Much of the U.S. critical infrastructure is potentially vulnerable to cyber-attack. Industrial control computer systems involved in this infrastructure are specific points of vulnerability, as cyber-security for these systems has not been perceived as a high priority. Industries potentially affected by a cyber-attack on industrial control systems include the electrical, telephone, water, chemical and energy sectors. The federal government has issued a warning regarding an increase in terrorist interest in the cyber-security of industrial control systems, citing both interest by international terrorist organizations in critical infrastructure and increases in cyber-attack on critical infrastructure computer systems. The potential consequences of a successful cyber-attack on critical infrastructure industrial control systems could be high, ranging from a temporary loss of service to catastrophic infrastructure failure affecting multiple states for an extended duration."
CRS Report for Congress, RL31534