Method and system for a synchronized pseudo-random privacy modem

Cryptography – Key management – Having particular key generator

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

380 9, 380 48, H04L 922

Patent

active

049245163

ABSTRACT:
A method and system for a synchronized pseudorandom privacy modem makes use of a pseudorandom signal generator to index into a table of N signal spaces thereby altering gain and phase modifiers so or to modify both the gain and phase of portions of the data signal being transmitted from a QAM modem and thus transmit an encrypted signal pattern to the other end of the communications channel. The modem transmitter circuit includes a data scrambler, and QAM signal point mapper, connected in series, as well as a pair of mixers having inputs from the pseudorandom signal generator and functioning to modify the gain and phase of portions of the QAM signal point mapper output signal before they are pulse amplitude modulated, filtered, converted to analog form, and transmitted over the communications channel. Complementary circuit elements in the receiver, which have been synchronized with those of the transmitter by baud rate counters at both locations, demodulate and decode the received encrypted signal.

REFERENCES:
patent: 4752953 (1988-07-01), Paik et al.
patent: 4837821 (1989-06-01), Kage

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method and system for a synchronized pseudo-random privacy modem does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and system for a synchronized pseudo-random privacy modem, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for a synchronized pseudo-random privacy modem will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2355747

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.