Secure communication control system

Details Secure communication control system Secure communication control system

1989-09-27

1991-01-15

Buczinski, Stephen C.

Cryptography

Key management

Having particular key generator

379100, 379344, 380 9, 380 41, 380 48, H04N 7167, H04M 1100

Patent

active

049859196

ABSTRACT:
Encoder/decoders are associated with conventional local and far-end communications equipment such as facsimile machines. Information to be faxed is encoded at one end, transmitted to the other end, and decoded, without affecting normal communications protocol or requiring other specialized equipment at either end. A secure information processing device is provided at each end, between the equipment and the communications line, and either encodes outgoing information or decodes incoming information, in accordance with a randomly generated key code, depending on whether the equipment at a particular end is transmitting or receiving a communication.

REFERENCES:
patent: 3507980 (1970-04-01), Rugaber et al.
patent: 4091423 (1978-05-01), Branscome
patent: 4759053 (1988-07-01), Satomi et al.
patent: 4815128 (1989-03-01), Malek
patent: 4866772 (1989-09-01), Schruter
patent: 4891633 (1990-01-01), Imazeki

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