公开(公告)号：US20150082040A1

公开(公告)日：2015-03-19

申请号：US14304255

申请日：2014-06-13

Applicant: Hitachi, Ltd.

Inventor： KOSUKE ANZAI ,  Hisayoshi Sato ,  Yoshiaki Isobe ,  Suguru Iwasaki

IPC: H04L9/08

CPC classification number: H04L9/0822 ,  H04L9/0861

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.

Abstract translation: 使用门户服务器，接收来自作为第一用户的代理的第二用户的终端的信息请求，并且存储在加密数据存储单元中的指向第一用户的终端的加密数据是 使用存储在第一加密密钥存储单元中的第二用户的重新加密密钥重新加密，并且通过第二用户的终端，接收的重新加密数据被发送到第二用户的终端 存储在第二加密密钥存储单元中的用于第二用户的加密密钥以及由第一用户的终端指定的时间密钥进行解密，与允许浏览信息的时间段相关。