TAG: Todd Humphreys

Image: GPS World

Directions 2013: The Future of GNSS Security

December 1, 2012

The GNSS interference session this year at the ION-GNSS conference in Nashville was one of the most crowded, confirming the need of all sectors of the community to understand the threats in GNSS and how they can be mitigated. In that context I received one of the most challenging questions of my career: “Can we predict the future of GNSS security?” What is the status of civil and commercial GNSS security today? Which are the threats and risks and how they are mitigated? Where are we going and what shall we expect from the future?


Read More
This article is tagged with , , , , , , , and posted in Defense, From the Magazine, Opinions
Image: GPS World

Future Visions from the GNSS Oscar Winners

October 3, 2012

At the magazine’s annual Leadership Dinner, held during the ION-GNSS Conference, we gave the first GNSS Leadership Awards […]


Read More
This article is tagged with , , , , and posted in Opinions
Image: GPS World

Drone Hack: Spoofing Attack Demonstration on a Civilian Unmanned Aerial Vehicle

August 1, 2012

By Daniel Shepard, Jahshan A. Bhatti, and Todd E. Humphreys  Unmanned aerial vehicle (uav) used in the […]


Read More
This article is tagged with , , , , , , , , , and posted in Transportation, UAV/UGV
Image: GPS World

Going Up Against Time: The Power Grid’s Vulnerability to GPS Spoofing Attacks

August 1, 2012

Spoofing tests against phasor measurement units demonstrate their vulnerability to attack. A generator trip in an automatic control scheme could be falsely activated by the GPS spoofing, possibly leading to cascading faults and a large-scale power blackout.


Read More
This article is tagged with , , , , and posted in Mobile
Image: GPS World

Detecting False Signals with Automatic Gain Control

April 1, 2012

A component of most GPS receiver front-ends, the automatic gain control (AGC) can flag potential jamming and spoofing attacks. The detection method is simple to implement and accessible to most GPS receivers. It may be used alone or as a complement other anti-spoofing architectures. This article presents results from a baseline AGC characterization, develos a simple spoofing detection method, and demonstrate the results of that method on receiver data gathered in the presence of a live spoofing attack.


Read More
This article is tagged with , , , , , , and posted in Defense, Mobile
Credit: Ryan H. Mitch, Ryan C. Dougherty, Mark L. Psiaki, Steven P. Powell, Brady W. O’Hanlon, Jahshan A. Bhatti, and Todd E. Humphreys

Innovation: Know Your Enemy

January 1, 2012

Signal Characteristics of Civil GPS Jammers
GPS jamming is a continuing threat. A detailed understanding of how the available jammers work is necessary to judge their effectiveness and limitations. A team of researchers from Cornell University and the University of Texas at Austin reports on their analyses of the signal properties of 18 commercially available GPS jammers.


Read More
This article is tagged with , , , , and posted in From the Magazine, Innovation, OEM
Image: GPS World

Straight Talk on Anti-Spoofing: Securing the Future of PNT

January 1, 2012

Disruption created by intentional generation of fake GPS signals could have serious economic consequences. This article discusses how typical civil GPS receivers respond to an advanced civil GPS spoofing attack, and four techniques to counter such attacks: spread-spectrum security codes, navigation message authentication, dual-receiver correlation of military signals, and vestigial signal defense. Unfortunately, any kind of anti-spoofing, however necessary, is a tough sell.


Read More
This article is tagged with , , , , , and posted in Defense, OEM
« Newer