Signal Authentication in Trusted Satellite Navigation Receivers

In some security-critical applications, a GPS satellite-navigation receiver is integrated with a tamper-resistant cryptographic module in order to provide remote attestation of location. Those in possession of the receiver may have an interest in it producing an incorrect output. Vehicle and container tracking, usage-based road charging, prisoner tagging, location-based access control are just some securepositioning examples where anti-spoof measures against local attackers are of concern. The discussed tests and trust metrics can help a tamper-resistant navigationsignal receiver to distinguish authentic signals at the RF antenna port from those forged using a signal simulator.