Title:
SECRET DISTRIBUTED SYSTEM AND SECRET DISTRIBUTION METHOD
Document Type and Number:
Japanese Patent JP2019168660
Kind Code:
A
Abstract:
To verify correct distributed data with a small calculation amount when determining before the recovery of the target data which is the correct distributed data of the (k, n) in the method data when the distributed data of a threshold secret dispersion data in the method is broken.SOLUTION: A method includes a secret distribution unit for adding any detection data column to the target data; dispersing the target data by adding the detection data column (k, n) in the threshold secret dispersion method (n is a natural number of 3 or more), dispersed in n distributed data using a decentralization function based on (k≤n); and generating a distributed data with n verification values by adding a verification value calculated from the encrypted distributed data each for encrypted distributed data encrypted using the encryption function the n distributed data each; and a control unit for storing distributed data with n verification values in a different database.SELECTED DRAWING: Figure 1
More Like This:
Inventors:
SAKAZAKI HISAO
ABE MISATO
ABE MISATO
Application Number:
JP2018058637A
Publication Date:
October 03, 2019
Filing Date:
March 26, 2018
Export Citation:
Assignee:
HITACHI LTD
International Classes:
G09C1/00
Domestic Patent References:
| JP2004336702A | 2004-11-25 | |||
| JP2009103774A | 2009-05-14 | |||
| JP2005234069A | 2005-09-02 | |||
| JP2003123032A | 2003-04-25 | |||
| JP2009010531A | 2009-01-15 |
Attorney, Agent or Firm:
Patent Business Corporation Daiichi International Patent Office