Accurate position, navigation and timing (PNT) is necessary for the functioning of many critical infrastructure sectors. Precision timing is particularly important and is mainly provided through the Global Positioning System (GPS). However, GPS’s 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 GPS 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 near term future.
Examples of measures that can be taken to enhance resiliency can be found in the following DHS issued set of best practice documents released via 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
DHS S&T will also be hosting a series of test opportunities for stakeholders to test equipment in unique live-sky signal environments with GPS interference. The first event will be in April 2017 and is intended for manufacturers of GPS receivers or equipment used in critical infrastructure.