Title:
DATA MAINTENANCE SYSTEM, DATA MAINTENANCE METHOD, DATA MAINTENANCE PROGRAM, DATA REGISTRATION DEVICE, AND DATA VERIFICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/238207
Kind Code:
A1
Abstract:
A data registration device (200) processes original data stored in a data source, and registers the processed data. A data verification device (300) calculates, as a reference digest value, a digest value of reference combined data generated on the basis of a digest value of the original data and a digest value of the processed data. The data verification device then: calculates a digest value of the registered processed data as a provisional digest value; acquires, as a provisional digest value, a digest value stored in the data source; calculates, as a verification digest value, a digest value of verification combined data generated on the basis of the provisional digest value of the original data and the provisional digest value of the processed data; and compares the verification digest value with the reference digest value.
Inventors:
MATSUMOTO MITSUHIRO (JP)
HONJO MASAYA (JP)
HONJO MASAYA (JP)
Application Number:
PCT/JP2022/022844
Publication Date:
December 14, 2023
Filing Date:
June 06, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G06F21/64
Foreign References:
| JP2008312064A | 2008-12-25 | |||
| JP2008211290A | 2008-09-11 | |||
| JP2010108383A | 2010-05-13 |
Attorney, Agent or Firm:
CROSS-BORDER PATENT FIRM (JP)
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