Cryptography – Key management – Having particular key generator
Reexamination Certificate
2007-05-29
2007-05-29
Vu, Kim (Department: 2135)
Cryptography
Key management
Having particular key generator
C380S028000, C380S037000, C380S043000, C380S044000, C380S045000, C380S046000, C380S047000, C380S268000
Reexamination Certificate
active
10046167
ABSTRACT:
In a buffer and a state included in a pseudorandom number generating apparatus, the state has the configuration of assuming that the unit length of data processing is n, the state has a size of 3×n bits, and the buffer has a capacity of 32×n bits, and according to clock control, a state transformation section (state transformation function) for conducting a state alteration from time t to time t+1 uses a nonlinear function F (having an n-bit input and an n-bit output) twice, or two different nonlinear functions F and G respectively once. The state transformation section has such a configuration that a nonlinear function such as a round function of a block cipher sufficiently evaluated as to the cryptographic security and implementation.
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Furuya Soichi
Takaragi Kazuo
Watanabe Dai
Dada Beemnet W
Mattingly ,Stanger ,Malur & Brundidge, P.C.
Vu Kim
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