- Patent Title: Data storage apparatus, data processing method, and computer readable medium adding a user attribute of a revoked user to an embedded decryption condition while encrypted data remains in an encrypted state
-
Application No.: US15548064Application Date: 2015-02-20
-
Publication No.: US10592682B2Publication Date: 2020-03-17
- Inventor: Takumi Mori , Yutaka Kawai , Nori Matsuda
- Applicant: MITSUBISHI ELECTRIC CORPORATION
- Applicant Address: JP Tokyo
- Assignee: MITSUBISHI ELECTRIC CORPORATION
- Current Assignee: MITSUBISHI ELECTRIC CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- International Application: PCT/JP2015/054873 WO 20150220
- International Announcement: WO2016/132546 WO 20160825
- Main IPC: H04L9/08
- IPC: H04L9/08 ; H04L9/30 ; G06F21/62
Abstract:
An encrypted data receiving unit (201) receives encrypted data which has been encrypted, in which a decryption condition to define a user attribute of a decryption-permission user who is permitted to decrypt the encrypted data is embedded. A data storage unit (202) stores the encrypted data received by the encrypted data receiving unit (201) in an encrypted state. A revocation processing unit (209) adds revocation information in which a user attribute of a revoked user who is no longer the decryption-permission user is indicated, to an embedded decryption condition that is embedded in the encrypted data, while the encrypted data remains in an encrypted state.
Public/Granted literature
- US20180025172A1 DATA STORAGE APPARATUS, DATA PROCESSING METHOD, AND COMPUTER READABLE MEDIUM Public/Granted day:2018-01-25
Information query
