Adaptive data ciphering/deciphering apparatuses and data communi

Details Adaptive data ciphering/deciphering apparatuses and data communi Adaptive data ciphering/deciphering apparatuses and data communi

1993-01-05

1993-10-12

Gregory, Bernarr E.

Cryptography

Cryptanalysis

380 18, 380 20, 380 30, 380 33, 380 49, H04L 928, H04L 930

Patent

active

052532933

ABSTRACT:
A data communication system adaptable to a ciphered data communication includes a data transmission line (3) for transmitting ciphered or non-ciphered data between a data transmitting device and a data receiving device 11, a data transmitting device (1) for transmitting data, a data receiving device (5) for receiving data transmitted through the data transmitting device, a data ciphering apparatus (2) on the side of the data transmitting device, and a data deciphering apparatus (4) on the side of the data receiving device. The data ciphering apparatus including switching device (2A), line condition detector device (2B) control code monitor, scrambling device (2E), and drive control (2D). The line condition detector device, the control code monitor, and the scrambling device supply the transmission line through the switching device with ciphered data of the data from the data transmitting device. The data deciphering apparatus includes switching device (4A), line condition detector device (4B), control code monitor (4C), descramble device (4E), and drive control device (4D). The line condition detector device, the control code monitor, and the descrambling device, receive data and supply the data receiving device through the switching device with deciphered data of received data transmitted through the transmission line.

REFERENCES:
patent: 4091423 (1978-05-01), Branscome
patent: 4368357 (1983-01-01), Gurak
patent: 4514761 (1985-04-01), Merrell et al.
patent: 4555805 (1985-11-01), Talbot
patent: 5001750 (1991-03-01), Kato et al.

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