Secure communication system

Details Secure communication system Secure communication system

H - Electricity

04

L

325/3, 340/70

H04L 9/00 (2006.01) H04K 1/00 (2006.01) H04K 1/02 (2006.01)

Patent

CA 1113567

Abstract of the Disclosure A secure communication system for transmitting and receiving an encoded information signal. The system generates at transmitting and receiving locations a predetermined unique pseudorandom code. A synchronized tracking signal is imposed on the information to be transmitted and added to the informa- tion to form an intermediate signal. The pseudorandom code is then multiplied by the intermediate signal directly so that the ultimate result appears to assume the character of pseudorandom noise, which is then transmitted to the receiving location. The synchronization and transmitted encoded portion is decoded at the receiver and used to generate a base signal for a pseudo- random generator at the receiving location, as well as initiate initial clocking pulse time for operation of the receiver pseudorandom generator. The receiver then generates the pre- determined pseudorandom code and divides the same against the encoded signal being received to form an intermediate signal having no pseudorandom signal component, which is them filtered to removed the tracking and masking signal and thereby generat- ing the original information signal desired.

313790

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