Random digital encryption secure communication system
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United States of America Patent
Stats
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Jul 27, 1982
Grant Date -
N/A
app pub date -
Apr 28, 1978
filing date -
Apr 28, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A new and improved secure communication system is provided. A product code, formed from two pseudorandom sequences of digital bits, is used to encipher or scramble data prior to transmission. The two pseudorandom sequences are periodically changed at intervals before they have had time to repeat. One of the two sequences is transmitted continuously with the scrambled data for synchronization. In the receiver portion of the system, the incoming signal is compared with one of two locally generated pseudorandom sequences until correspondence between the sequences is obtained. At this time, the two locally generated sequences are formed into a product code which deciphers the data from the incoming signal. Provision is made to ensure synchronization of the transmitting and receiving portions of the system.
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