Cryptography – Communication system using cryptography – Time segment interchange
Reexamination Certificate
2003-01-22
2008-12-02
Smithers, Matthew B (Department: 2137)
Cryptography
Communication system using cryptography
Time segment interchange
C380S029000
Reexamination Certificate
active
07460666
ABSTRACT:
To provide a high-speed combinational circuit including an S-Box and a method for creating an RO-BDD that defines a configuration of the combinational circuit. The combinational circuit includes a number of independent selector groups for each generating an output bit separately, the number corresponding to number of the output bits, and a driver chain for supplying a primary input to each of the selector groups, in which each of the selector groups includes a plurality of selectors connected to each other to form a number of stages, the number of stages being equal to or less than number of bits of the primary input, and a select signal for the selectors in each stage is driven by one primary input.
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Morioka Sumio
Satoh Akashi
Zhang Gang
International Business Machines - Corporation
Smithers Matthew B
Tuchman Ido
Yamonaco Lisa M.
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