Title:
CONTROL SERVER, DATA SHARING SYSTEM, AND CONTROL PROGRAM
Document Type and Number:
WIPO Patent Application WO/2021/124558
Kind Code:
A1
Abstract:
Upon receiving a usage request including a file identifier and a version identifier from a user terminal 20, a control server 10 transmits a file request based on the usage request to a file management system, and transmits an authority information request based on the usage request to a distributed ledger system. Upon receiving the file request, the file management system acquires a file corresponding to a combination of the file identifier and the version identifier, and transmits the file to the control server 10. Upon receiving the authority information request, the distributed ledger system acquires authority information corresponding to the combination of the file identifier and the version identifier from the distributed ledger, and transmits the authority information to the control server 10. The control server 10 transmits a file to the user terminal 20, when the user of the user terminal can view the file, on the basis of the authority information.
Inventors:
ISHIDA TATSURO (JP)
OHASHI SHIGENORI (JP)
FUJIMURA SHIGERU (JP)
NAKADAIRA ATSUSHI (JP)
CHIKADA MASAYOSHI (JP)
OHASHI SHIGENORI (JP)
FUJIMURA SHIGERU (JP)
NAKADAIRA ATSUSHI (JP)
CHIKADA MASAYOSHI (JP)
Application Number:
PCT/JP2019/050136
Publication Date:
June 24, 2021
Filing Date:
December 20, 2019
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G06F21/62; G06F16/17; G06F16/185
Domestic Patent References:
| WO2019226580A1 | 2019-11-28 |
Foreign References:
| US20170220814A1 | 2017-08-03 | |||
| US20190354967A1 | 2019-11-21 | |||
| US20130132439A1 | 2013-05-23 |
Other References:
YONGLE CHEN ET AL.: "An improved P2P File System Scheme based on IPFS and Blockchain", 2017 IEEE INTERNATIONAL CONFERENCE ON BIG DATA (BIGDATA, pages 2652 - 2657
Attorney, Agent or Firm:
TAIYO, NAKAJIMA & KATO (JP)
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