Data processing: database and file management or data structures – Data integrity – Checking consistency
Reexamination Certificate
2006-08-02
2010-06-08
Corrielus, Jean M (Department: 2162)
Data processing: database and file management or data structures
Data integrity
Checking consistency
C707S698000, C713S168000
Reexamination Certificate
active
07734598
ABSTRACT:
A computer-readable recording medium having recorded a hash-value generation program for calculating a hash value within a shorter period of processing time. When a target disk is specified for hash value calculation, a segment division block divides the target disk into fixed-length segments. A first hash-value calculation block applies a one-way hash function to all data in each segment to calculate a per-segment hash value. A second hash-value calculation block arranges the per-segment hash values in a segment order corresponding to the order of the data stored on the target disk and applies the one-way hash function again to the arranged per-segment hash values to calculate a total hash value. The hash value calculated in this manner is defined as a hash value of the target disk.
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Maruyama Tetsutaro
Noguchi Yasuo
Ogiwara Kazutaka
Take Riichiro
Tamura Masahisa
Colan Giovanna
Corrielus Jean M
Fujitsu Limited
Fujitsu Patent Center
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