Adaptive fraud monitoring and control
Anti-tapping system
Circuit arrangement for preventing unauthorized access to a comm
Communication system
Digital interface system
Limited use circuit
Lock control method for on-board terminal equipment of a mobile
Method and apparatus for use in securing an electronic...
Method for maximizing channel selection in a communication syste
Mobile terminal device and method of updating program
Mobile terminal device and method of updating program
Mobile-radio system with a reconnaissance device contained in a
Secure communication using array transmitter
Secure mobile radio telephony
Secure mobile telephone system
Secure mobile telephone system
Security communication system
Selective delivery of electronic messages in a multiple computer
System and method for blocking devices from a carrier network