The critical infrastructure sectors rely on accurate position, navigation and timing (PNT) to function. Currently, the global positioning system (GPS) is the primary source of distributed and accurate timing information. However, GPS’s space-based signals are low-power and unencrypted, making them susceptible to both intentional and unintentional disruption.
The Department of Homeland Security (DHS) Science and Technology Directorate (S&T) has dedicated a multi‑year program to address GPS vulnerabilities in critical infrastructure, with a multi‑pronged approach to:
Conduct vulnerability and impact assessments;
Explore complementary timing technologies; and
Engage with industry through outreach meetings and events.