U.S. flag

An official website of the United States government

Government Website

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Safely connect using HTTPS

Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

GPS

Last Updated: September 19, 2023 | Press Releases

S&T Invites Critical Infrastructure Owners and Operators to GPS Spoofing Test Event

DHS S&T announced an opportunity for Critical Infrastructure Owners & Operators (CI O&O) and GPS equipment manufacturers to test their equipment against GPS disruption and spoofing.

Last Updated: June 13, 2022 | Press Releases

S&T Publishes Resilient PNT Reference Architecture and Update to Conformance Framework

DHS S&T has published the Resilient Positioning, Navigation, and Timing (PNT) Reference Architecture.

Last Updated: June 9, 2022 | Publication

Resilient PNT Reference Architecture

The Resilient PNT Reference Architecture continues where the Conformance Framework left off by describing a concrete application of resilience concepts for a holistic approach to next-generation resilient PNT. It provides example implementations of resilience techniques as well as reference designs of architecture instances that align with the resilience levels within the Resilient PNT Conformance Framework.

Last Updated: October 7, 2021 | Press Releases

News Release: DHS Publishes Critical Infrastructure Protection Resources

DHS S&T announced that it has published a GPS Receiver Whitelist Development Guide and a new release of the Positioning, Navigation, and Timing (PNT) Integrity Library to protect against the spoofing, or deceiving, of GPS devices through false signals.

Last Updated: July 27, 2021 | Publication

GPS Receiver Allow List Development Guide

Historically, Global Positioning System (GPS) receivers have been considered single-purpose appliances like radios that required very focused, application-specific hardware but placed less emphasis on software. In contrast, today’s receivers are implemented and integrated as embedded software applications distributed over general purpose processors with special GPS hardware.

Last Updated: June 30, 2021 | Press Releases

News Release: S&T Transitions Resilient PNT Conformance Framework

DHS S&T transitioned the Resilient Positioning, Navigation, and Timing Conformance Framework to the Institute of Electrical and Electronics Engineers to further refine into international industry standards. 

Last Updated: February 26, 2021 | Press Releases

News Release: DHS Publishes Free Resources to Protect Critical Infrastructure From GPS Spoofing

DHS S&T announced today it has published the Positioning, Navigation, and Timing (PNT) Integrity Library and Epsilon Algorithm Suite to protect against Global Navigation Satellite System (GNSS) spoofing, or deceiving a Global Positioning System (GPS) device through false signals.

Last Updated: December 18, 2020 | Press Releases

News Release: S&T Publishes the Resilient PNT Conformance Framework

DHS S&T published the Resilient Positioning, Navigation, and Timing (PNT) Conformance Framework today. PNT services, such as the Global Positioning System (GPS), is a national critical function that enables many applications within the critical infrastructure sectors.

Last Updated: December 17, 2020 | Publication

ST Resilient PNT Conformance Framework

Positioning, Navigation, and Timing (PNT) services have become an invisible but essential utility for many critical infrastructure operations.

Last Updated: November 10, 2020 | Press Releases

Feature Article: Upcoming S&T Guidance Improve Critical Infrastructure Resilience

S&T's Resilient PNT Conformance Framework will improve critical infrastructure’s ability to prevent, respond, and recover from GPS disruptions.