Title:
DATA MANAGEMENT DEVICE, DATA MANAGEMENT METHOD, DATA MANAGEMENT PROGRAM, AND DATA MANAGEMENT SYSTEM
Document Type and Number:
Japanese Patent JP2020098993
Kind Code:
A
Abstract:
To provide a data management device or the like capable of flexibly changing data access authority.SOLUTION: A data management device 10 includes: an encrypted common key public unit 14 for controlling public and private nature of an encrypted common key obtained by encrypting a common key used to encrypt encrypted data made public with a public key corresponding to a private key; The private and public keys may be set for each plurality of users. The encrypted common key public unit 14 may publish the encrypted common key to a cloud storage 30 which does not require user authentication.SELECTED DRAWING: Figure 1
Inventors:
KURIHARA ATSUSHI
KUBO TAKESHI
KUBO TAKESHI
Application Number:
JP2018236200A
Publication Date:
June 25, 2020
Filing Date:
December 18, 2018
Export Citation:
Assignee:
ZETTANT INC
International Classes:
H04L9/08; G06F21/60; G06F21/62; H04L9/14
Domestic Patent References:
| JP2001265657A | 2001-09-28 | |||
| JP2004023237A | 2004-01-22 | |||
| JP2005027220A | 2005-01-27 |
Other References:
古井陽之助 他: "利用期限つきデジタルコンテンツ利用システムのための通信と同期的処理", マルチメディア，分散，協調とモバイル（ＤＩＣＯＭＯ）シンポジウム論文集, vol. 第2005巻 第6号, JPN6022039406, 6 July 2005 (2005-07-06), pages 565 - 568, ISSN: 0004875943
Attorney, Agent or Firm:
Yoshiyuki Inaba
Toshifumi Onuki
Akihiko Eguchi
Kazuhiko Naito
Toshifumi Onuki
Akihiko Eguchi
Kazuhiko Naito