Secret communication control apparatus

Details Secret communication control apparatus Secret communication control apparatus

1990-03-07

1991-03-19

Buczinski, Stephen C.

Cryptography

Key management

Having particular key generator

380 9, 380 10, 380 20, 380 49, 380 55, H04N 132

Patent

active

050017500

ABSTRACT:
A secret communication control apparatus used to effect secret communication with communication equipment, for example, facsimile equipment, which transmits picture information by use of public communication lines. When a communication control code that is utilized to set a communication mode is to be transmitted, the intervention of the secret communication control apparatus in the communication is suspended by switching a change-over switch, so that the main body of the local communication equipment and the remote communication equipment perform direct transmission of the communication control code therebetween without passing it through the secret communication control apparatus. It is therefore possible to transmit the signal in the minimized time, that is, in the same way as in the case of ordinary, nonsecret communication.

REFERENCES:
patent: 3647949 (1972-03-01), Closs et al.

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