GPS As a Key Distribution Platform

The US military has been using GPS satellites to broadcast encryption codes for nearly 20 years, sending hidden information to devices that use GPS. This was discovered by Steven Murdoch, who found a correlation between the broadcast and the rollout of the military's Over-the-Air Distribution and Rekeying systems. This method replaced manual distribution of cryptographic keys, allowing remote rekeying of military GPS receivers. This revelation has significant implications for security and encryption. Engineers should be aware of this hidden functionality in GPS systems.