METHODS TO SUPPORT MULTIPLE ENCRYPTION ALGORITHMS IN A TRUNKED RADIO SYSTEM
Original Publication Date: 1997-Mar-01
Included in the Prior Art Database: 2002-May-15
In secure, multi-key & multi-algorithm trunked radio systems, infrastructure equipment and sub- scriber radios must have matching encryption algo- rithm types in order to permit secure communica- tions between radios and consoles or between radios and telephone interconnect devices. Many different encryption algorithm types are available, and today's radios and infrastructure units can only support up to two of these algorithms. The problem solved by this invention is that in today's systems, the number and type of different encryption algo- rithms permitted to operate in the system is limited to the maximum number (in this case, two) that can he supported by any given infrastructure Digital Interface Unit (DIU), and each of the DIUs must be equipped with the same encryption algorithms. As customer's needs for security continue to expand, the ability to support multiple encryption algorithms provides important opportunities for flexibility and inter-operability.