Method and apparatus for over-the-air programming of communicati

Details Method and apparatus for over-the-air programming of communicati Method and apparatus for over-the-air programming of communicati

1992-11-05

1994-04-05

Cain, David C.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 42, H04L 900

Patent

active

053012321

ABSTRACT:
In a communication system (300), a controller interface (302) provides for monitoring of channel activity in order to determine communication devices (400) which are communicating using old encryption information. Upon a key management controller (306) determining that one or more communication devices are using an old encryption scheme, the key management controller (306) establishes communications with the communication device(s) (400) and provides them with the new encryption information.

REFERENCES:
patent: 5150408 (1992-09-01), Bright
patent: 5161189 (1992-11-01), Bray et al.
patent: 5164986 (1992-11-01), Bright
patent: 5185795 (1993-02-01), Bright
patent: 5185797 (1993-02-01), Barrett et al.
Motorola Information sheet "Advanced SECURENET.RTM." -Digital Voice Protection System Key Management Controller, (No R3-17-62-1989), 2 pages discloses a control device (KMC) for use in Over-the-Air Rekeying Systems.
Motorola Information Brochure "Advanced SECURENET.RTM. Systems"-Multikey Operation, Over-the-Air Rekeying (OTAR), (No. R3-17-61-1989), 4 pages, discusses multikey and OTAR System Operation.
Motorola Brochure "System Planner-Advanced SECURENET.RTM. for Conventional Systems" (No. R4-17-A, Jan. 1992), 24 pages, discloses the operation of present Advanced SECURENET.RTM. Systems.
Motorola System Installation and User's Guide for "Advanced SECURENET.RTM.-Key Management Controller (KMC)", (No. 68P81084E85-B, Apr. 10, 1992), discloses overall operation of an Advanced SECURENET.RTM. System.

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