Cryptography – Communication system using cryptography – Data stream/substitution enciphering
Reexamination Certificate
2008-01-08
2011-12-13
Nguyen, Thu Ha (Department: 2453)
Cryptography
Communication system using cryptography
Data stream/substitution enciphering
C380S030000, C380S255000, C380S259000, C380S277000, C713S158000, C713S175000, C713S182000, C713S187000, C713S189000, C726S027000
Reexamination Certificate
active
08077867
ABSTRACT:
The present invention relates to a confidential information processing device, a confidential information processing apparatus, and a confidential information processing method, and particularly to a confidential information processing device which performs multiple cryptographic computation for different target data included in a data stream. With this configuration, the context control unit outputs the stream on which the cryptographic computation is performed to an external device or other stream analysis unit. Thus, by setting the number of cryptographic computation on a correspondence table, the number of computation can be set to any number. Thus, the confidential information processing device according to the present invention can perform any number of cryptographic computations on one stream. Furthermore, without outputting the stream whenever a cryptographic computation is completed, multiple cryptographic computations can be performed with one stream input. In addition, by setting the number of cryptographic computation on the correspondence table, the number of computation can be easily changed.
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U.S. Appl. No. 11/912,422 to Shimizu et al., which was filed on Oct. 24, 2007.
Fujiwara Makoto
Kuriki Satoru
Nemoto Yusuke
Sano Masahiro
Torisaki Yuishi
Greenblum & Bernstein P.L.C.
Nguyen Thu Ha
Panasonic Corporation
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