Invention Application
- Patent Title: METHOD, INFORMATION SERVICE SYSTEM AND PROGRAM FOR INFORMATION ENCRYPTION/DECRYPTION
- Patent Title (中): 方法，信息服务系统和信息加密/分解程序
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Application No.: US14304255Application Date: 2014-06-13
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Publication No.: US20150082040A1Publication Date: 2015-03-19
- Inventor: KOSUKE ANZAI , Hisayoshi Sato , Yoshiaki Isobe , Suguru Iwasaki
- Applicant: Hitachi, Ltd.
- Applicant Address: JP Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JP Tokyo
- Priority: JP2013-189996 20130913
- Main IPC: H04L9/08
- IPC: H04L9/08
Abstract:
With a portal server, a request for information from a terminal of a second user that is an agent for a first user is received, and an encrypted data directed to a terminal of the first user, stored in an encrypted-data memory unit, is re-encrypted using a re-encryption key for the second user, stored in a first encryption-key memory unit, arid is transmitted to the terminal of the second user, with the terminal of the second user, the re-encrypted data received is decrypted using an encryption key for the second user, stored in a second encryption-key memory unit, and time keys specified by the terminal of the first user, related to a time-period during which browsing of the information is permitted.
Public/Granted literature
- US09479330B2 Method, information service system and program for information encryption/decryption Public/Granted day:2016-10-25
Information query
