Maritime critical infrastructure protection

" U.S. maritime ports handle more than $1.3 trillion in cargo annually. The operations of these ports are supported by information and communication systems, which are susceptible to cyber-related threats. Failures in these systems could degrade or interrupt operations at ports, including the flow of commerce. Federal agencies-in particular DHS- and industry stakeholders have specific roles in protecting maritime facilities and ports from physical and cyber threats. GAO's objective was to identify the extent to which DHS and other stakeholders have taken steps to address cybersecurity in the maritime port environment. GAO examined relevant laws and regulations; analyzed federal cybersecurity-related policies and plans; observed operations at three U.S. ports selected based on being a high-risk port and a leader in calls by vessel type, e.g. container; and interviewed federal and nonfederal officials. "