Cryptography – Electric signal modification – Having production of printed copy
Patent
1992-06-09
1993-11-09
Barron, Jr., Gilberto
Cryptography
Electric signal modification
Having production of printed copy
380 28, 380 47, H04L 916, H04L 918
Patent
active
052610039
ABSTRACT:
Data communication system and method with a data scrambling with high security. A data scrambling part is provided with a extended key memory for storing addresses of extended keys, and one of the extended keys is used as a parameter for scrambling an input data to be scrambled. In order to select one of the extended keys to be input to each processing block for converting the input data by using the parameter to output converted data, a selector varies the address of the extended key depending on a plaintext of the input data.
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Barron Jr. Gilberto
Mitsubishi Denki & Kabushiki Kaisha
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