Contact the ISAC Help Desk toll free at 1-866-STISAC1 (1-866-784-7221)
Surface Transportation and Public Transportation Information Sharing and Analysis Center
Ninety-five percent of the United States critical infrastructures are privately owned.
Originally detailed in Presidential Decision Directive (PDD-63), Homeland Security Presidential Directive (HSPD-7)
encourages the creation of private sector Information Sharing and Analysis Centers (ISACs) to
protect this infrastructure from attack. At the request of the U.S. Department of Transportation (DOT),
this ST-ISAC was formed. The PT-ISAC has since become an "ISAC within an ISAC," to take advantage of the
overarching ST-ISAC to realize increased economies of scale.
The ISAC provides a secure cyber and physical security capability for owners,
operators and users of critical infrastructure. Security and threat information is
collected from worldwide resources, then analyzed and distributed to members to
help protect their vital systems from attack.
The ISAC also provides a vehicle for the anonymous or attributable sharing of incident,
threat and vulnerability data among the members. Members have access to information and analytical reporting
provided by other sources, such as U.S. and foreign governments; law enforcement agencies,
technology providers and international computer emergency response teams (CERTs).