Inventors:
George M. Barney - Scottsdale AZ
Douglas A. Hardy - Mesa AZ
Craig R. Balogh - Mesa AZ
Assignee:
Motorola, Inc. - Schaumburg IL
International Classification:
H04L 900, H04L 930, H04L 908, H04L 912
Abstract:
A method for establishing a secure communications link between first and second terminals includes a step of exchanging a first message. The first message contains information describing encryption devices and communications modes available within the terminals and user authentication information. The method also includes a step of selecting, in at least one terminal, a common key generation and ciphering algorithm. The method further includes steps of exchanging a second message for providing data to form traffic keys, exchanging a third message for synchronizing secure communications and initiating secure communication.