Cryptography – Cryptanalysis
Patent
1989-11-13
1992-01-14
Tarcza, Thomas H.
Cryptography
Cryptanalysis
380 49, H04L 900
Patent
active
050816756
ABSTRACT:
The address space of a data storage device is arbitrarily divided into a plurality of data-segments and a different data scrambling algorithm is assigned to each of the data-segments. A programmable address scrambling device is interposed between the address port of the data storing device and a system address bus. An appropriate one of many possible scrambling keys must be supplied to the programmable address scrambling device for each of the data-segments in order to retrieve a desired dataword within each of the data-segments.
REFERENCES:
patent: Re30957 (1982-06-01), Feistel
patent: 4040034 (1977-08-01), Belady et al.
patent: 4120030 (1978-10-01), Johnstone
patent: 4168396 (1979-09-01), Best
patent: 4195200 (1980-03-01), Feistel
patent: 4465901 (1984-08-01), Best
patent: 4471163 (1984-09-01), Donald et al.
patent: 4523271 (1985-06-01), Levien
patent: 4525599 (1985-06-01), Curran et al.
patent: 4558176 (1985-12-01), Arnold et al.
patent: 4573119 (1986-02-01), Westheimer et al.
patent: 4634807 (1987-01-01), Chorley et al.
patent: 4757534 (1988-07-01), Matyas et al.
patent: 4759062 (1988-07-01), Traub et al.
patent: 4764959 (1988-08-01), Watanabe et al.
patent: 4817140 (1989-03-01), Chandra et al.
patent: 4847902 (1989-07-01), Hampson
Swann Tod
Tarcza Thomas H.
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