EE Times: Expert, lawmakers at odds over GPS security, July 2012

“After testifying before Congress about security vulnerabilities in civil GPS systems last week, Todd Humphreys is convinced the industry needs a new approach to plugging holes in what he calls “the most popular unauthenticated protocol in the world.”

“There’s a way to add backward-compatible authentication like digital watermarks to GPS signals, and last week I had my best shot at convincing lawmakers to fix the problem at the signal source,” said Humphreys who directs the Radionavigation Laboratory at the University of Texas at Austin.”

Continue reading the EE Times article.