Digital radio with security system for selectively enabling soft

Details Digital radio with security system for selectively enabling soft Digital radio with security system for selectively enabling soft

1988-04-19

1990-07-10

Tarcza, Thomas H.

Cryptography

Electric signal modification

Including particular structure or housing

34082531, H04K 100

Patent

active

049411748

ABSTRACT:
Different digital radio transceiver front panel escutcheon plate modules are provided for different optional transceiver configurations. A security circuit is provided in each module in addition to user controls and associated circuitry. The security circuit is connected to communicate serial data signals to and from a digital signal controller which is part of the main transceiver circuitry. The controller is capable of performing any of various basic and option functions under control of program control instructions stored in an associated non-volatile memory. Upon initial application of power to the transceiver, the controller transmits a sequence of digital signals to the security circuit. The security circuit permutes the sequence of signals into a different sequence, the specific permutation used being arbitrarily complex--and dependent on transceiver "option" features to be enabled. The security circuit communicates the permuted signal sequence back to the controller. The controller enables (executes) portions of the program control instructions stored in its associated non-volatile memory and disables (does not execute) other portions of the stored program control instructions in response to the sequence received from the security circuit.

REFERENCES:
patent: 4247951 (1981-01-01), Hattori et al.
patent: 4254504 (1981-01-01), Lewis et al.
patent: 4378551 (1983-01-01), Drapac
patent: 4392135 (1983-01-01), Ohyagi
patent: 4471216 (1984-09-01), Herve
patent: 4484355 (1984-11-01), Henke et al.
patent: 4510623 (1985-01-01), Bonneau et al.
patent: 4525865 (1985-01-01), Mears
patent: 4618997 (1986-01-01), Imazeki et al.
patent: 4638120 (1987-01-01), Herve
patent: 4688261 (1987-01-01), Killoway et al.
patent: 4691355 (1987-09-01), Wirstrom et al.
patent: 4771399 (1988-09-01), Snowden et al.
The .mu.P: The Key to an Advanced Frequency Synthesized HF SSB Amateur Radio Transceiver, Robert M. Groh, Benton Harbor, MI 49022, IEEE Transactions on Consumer Electronics, vol. 26 (Aug. 1980), pp. 232-246.
Dyna TAC 6000X Universal Mobile Telephone, Motorola, Schaumburg, IL 60196.

Affiliated with

Also associated with

Rating

Digital radio with security system for selectively enabling soft does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital radio with security system for selectively enabling soft, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital radio with security system for selectively enabling soft will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1725298