Use a GPS Firewall for Secure Sky Reception

The solution stack starts with the ability to support sky GNSS signal reception in a highly secure manner. The vulnerability of these GNSS systems to various signal incidents is well documented and their proliferation of GNSS systems has embedded these vulnerabilities into critical national and corporate infrastructures that rely upon GNSS-delivered PNT for daily operations. Such widespread deployment of GNSS makes it impractical to replace all the fielded systems in a timely or cost-effective manner.

Microsemi has recently launched the BlueSky™ GPS Firewall that solves the problem of protecting already deployed GPS systems by providing a cost-effective overlay solution installed between existing GPS antennas and GPS systems. Similar to a network firewall, the BlueSky GPS Firewall protects systems Sky inside the firewall from untrusted, sky-based signals outside the firewall.

A software engine that analyzes the GPS signal is contained within the Blue GPS Firewall. The GPS Sky signal data is received and evaluated from each satellite to ensure compliance, along with analyzing received signal characteristics. This information is used by the firewall to eliminate anomalous GPS signals and provide a hardened GPS signal output to downstream GPS systems.

The BlueSky GPS Firewall can be deployed in-line between any standard GPS antenna and stationary GPS Sky receiver to provide detection of GPS signal incidents before they enter into a GPS receiver system. The system can be deployed in-building and/or in a cabinet without requiring changes to the GPS antenna and/or cabling.

Similar to network security threats, new GPS errors are on the rise and Microsemi is continuously tracking GPS signal manipulation including spoofing threats, jamming incidents, multipath signal interference, space weather, and many other issues that can create GPS signal anomalies, disruptions, and outages.

At the core of the BlueSky GPS Firewall is a programmable anomaly detector that validates the GPS Sky subframes for spoofing incidents based on defined data validation rules. A wide range of rules have already been built into the BlueSky GPS Firewall to detect suspicious time and position inconsistencies. As with traditional security firewalls, new validation rules are dynamically loaded into the BlueSky GPS Sky Firewall as new threats are identified.

Do you know how easy it is to protect against GPS vulnerabilities including spoofing and jamming threats. Learn how here.

Please contact me ( personally for more information or if I may be of assistance. Connect with me on LinkedIn too.

Tags: , , , , , , , , , , ,

This entry was posted by Greg Wolff on at and is filed under GPS/GNSS. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

Leave a Reply

You must be logged in to post a comment.