Cryptography – Communication system using cryptography – Data stream/substitution enciphering
Patent
1997-11-21
1999-03-09
Hayes, Gail O.
Cryptography
Communication system using cryptography
Data stream/substitution enciphering
380 43, 380 9, 380 14, 380 59, H04L 900, H04N 7167
Patent
active
058811540
ABSTRACT:
A data scramble transmission system with a data transmission link coupled between sending and receiving ends is provided. The link adopts transmission frames each of which is constituted by data and control bits periodically added to the data. The system includes a scramble unit located at the sending end, for detecting each of the transmission frames of an input signal stream, for interchanging bit-stream positions of data portion in the detected transmission frame in accordance with a predetermined order to produce interchanged signal stream, and for outputting the interchanged signal stream, and a descramble unit located at the receiving end which receives the interchanged signal stream from the sending end, for detecting each of the transmission frames of the received interchanged signal stream, for reinterchanging bit-stream positions of data portion in the detected transmission frame so as to reconstitute the signal stream inputted into the scramble unit at the sending end, and for outputting the reconstituted signal stream.
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Nohara Mitsuo
Yamazaki Katsuyuki
Hayes Gail O.
Kokusai Denshin Denwa Co. Ltd.
Laufer Pinchus M.
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