Accurate position, navigation, and timing (PNT) is necessary for the functioning of many critical infrastructure sectors. Precision timing is particularly important and is primarily provided through the Global Positioning System (GPS). However, GPS’ space-based signals are low-power and unencrypted, making them susceptible to both intentional and unintentional disruption.
To address GPS vulnerabilities in critical infrastructure, S&T’s Position, Navigation, and Timing (PNT) Program has a multi-pronged approach of conducting vulnerability and impact assessments, developing mitigations, exploring complementary timing technologies, and engaging with industry through outreach events and meetings. Through these sustained efforts, the goal of the program is to increase the resiliency of critical infrastructure to GPS vulnerabilities in the future.
Examples of measures that can be taken to enhance resiliency can be found in the following DHS best practice documents released via the Industrial Control Systems Cyber Emergency Response Team (ICS-CERT):
- Best Practices for Improved Robustness of Time and Frequency Sources in Fixed Locations (PDF, 10 pages, 465.67 KB)
- Improving the Operation and Development of Global Positioning System (GPS) Equipment Used by Critical Infrastructure (PDF, 21 pages, 512 KB)
As part of industry engagement, DHS S&T hosts GPS Equipment Testing for Critical Infrastructure (GET-CI) to give technical researchers, industry partners, and stakeholders an opportunity to test and evaluate their equipment in a unique Live-Sky environment. To learn more about the work DHS S&T is doing to promote resiliency in position, navigation, and timing, email GPS4Critical-Infrastructure@hq.dhs.gov.