Privacy communication method and privacy communication apparatus

Details Privacy communication method and privacy communication apparatus Privacy communication method and privacy communication apparatus

1983-09-14

1988-05-03

Cangialosi, Salvatore

Cryptography

Communication system using cryptography

Variable time delay modulation

380 28, H04L 900

Patent

active

047425466

ABSTRACT:
A privacy communication system in which signals transmitted from a transmitter are subjected to time base compression and expansion while the received signal is subjected to time base expansion and compression in synchronism with the expansion and compression occurring at the transmitter. The clock frequency of the clock in the transmitting and receiving ends are changed in the synchronism according to a predetermined algorithem.

REFERENCES:
patent: 3202764 (1965-08-01), Adams et al.
patent: 3676862 (1972-07-01), Sasabe
patent: 4302628 (1981-11-01), Akrich et al.
patent: 4378593 (1983-03-01), Yamamoto
patent: 4392021 (1983-07-01), Slate
patent: 4435832 (1984-03-01), Asada et al.
patent: 4499503 (1985-02-01), Suzuki

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