H - Electricity – 04 – K
Patent
H - Electricity
04
K
379/1, 325/3
H04K 1/00 (2006.01) H04B 7/26 (2006.01) H04L 9/22 (2006.01) H04Q 7/38 (2006.01)
Patent
CA 1204163
SECURE MOBILE RADIO TELEPHONY Abstract An arrangement for generating an encryption key for use in encrypting communications between a mobile radio telephone unit and a base station is disclosed which can be readily changeable in real time. Each mobile unit is equipped with a machine-readable nonbroadcast code and the base station can access a translation table correlating the nonbroadcast code with the public directory number of the mobile unit. Upon changing frequencies, as for example, when a mobile unit moves from one geographical cell area to another, the current and previous frequencies or channel numbers are left to select sets of digit positions in the nonbroadcast code. The contents of these digit positions are then convolved and inserted into a modified version of the nonbroadcast code generated by convolving the original code with a shifted replica thereof. The key so generated may be used to encrypt communications for the use of any known encrypting circuitry.
431851
Kirby Eades Gale Baker
Western Electric Company Incorporated
LandOfFree
Secure mobile radio telephony does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Secure mobile radio telephony, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Secure mobile radio telephony will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1216532