Cryptography – Key management – Having particular key generator
Reexamination Certificate
2005-07-12
2005-07-12
Caldwell, Andrew (Department: 2131)
Cryptography
Key management
Having particular key generator
C380S037000, C380S047000
Reexamination Certificate
active
06917684
ABSTRACT:
The subkey data generating unit101has two different subkey key generation processes. When encrypting a (T*n)thplaintex block (where T denotes a predetermined cycle and n is a positive integer), sixteen sets of subkey data are generated. In all other cases, two sets of subkey data are generated. The encrypting unit100encrypts the plaintex using the generated sixteen or two sets of subkey data.
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Endo Naoki
Ohmori Motoji
Sano Fumihiko
Tatebayashi Makoto
Yokota Kaoru
Caldwell Andrew
Henning Matthew
Kabushiki Kaisha Toshiba
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