Title:
INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2019/026372
Kind Code:
A1
Abstract:
[Problem] To provide a technique of implementing flexible access control that allows only specific users to decrypt secret information in hierarchical secret sharing.
[Solution] Provided is an information processing device including a control unit for producing a plurality of shares based on a first key from the first key that enables decrypting first data on the basis of a request for producing the first key; restoring the first key from the plurality of shares based on the first key on the basis of a request for producing a second key; and encrypting, with the first key, a part of the plurality of shares based on a whole or a part of the first key as the second key that enables decrypting second data while producing a plurality of shares based on the second key.
Inventors:
MARUYAMA SHINYA (JP)
KAGEYAMA YUICHI (JP)
MIYAKOSHI MANA (JP)
KAGEYAMA YUICHI (JP)
MIYAKOSHI MANA (JP)
Application Number:
PCT/JP2018/017805
Publication Date:
February 07, 2019
Filing Date:
May 08, 2018
Export Citation:
Assignee:
SONY CORP (JP)
International Classes:
G09C1/00; G06F21/62; H04L9/14
Foreign References:
JP2011010170A | 2011-01-13 | |||
JP2009103774A | 2009-05-14 | |||
JP2008219177A | 2008-09-18 |
Other References:
"NTT Communications. Secret Sharing Engine for Secure Protection of Confidential Information", NTT TECHNICAL REVIEW, vol. 17, no. 2, 1 February 2005 (2005-02-01), pages 38 - 41
Attorney, Agent or Firm:
KAMEYA, Yoshiaki et al. (JP)
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