Title:
コンテンツ販売管理装置及びコンテンツ販売システム及びコンピュータプログラム及びコンテンツ販売管理方法
Document Type and Number:
Japanese Patent JP5677194
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To facilitate management of the rights to utilize content, thereby improving safety.SOLUTION: A key generation device 831 generates a set of keys: an encryption key 731 necessary to generate plural encrypted contents by encrypting plural contents for sell by a function type encryption method on the basis of attributes set in the respective contents and a master key necessary to generate a decryption key to decrypt the contents encrypted by using the encryption key 731. A user management device 832 stores in memory the information regarding one or more contents which users have purchased. A decryption key generation device 833 generates a decryption key 733 using the master key generated by the key generation device 831 on the basis of the information stored in memory by the user management device 832, the decryption key 733 having the conditions set therein which enable the users to decrypt with one decryption key the plural encrypted contents generated using the encryption key generated by the key generation device 831, thereby restoring one or more contents the users have purchased.
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Inventors:
柴田 陽一
坂上 勉
山中 忠和
中村 大輔
坂上 勉
山中 忠和
中村 大輔
Application Number:
JP2011112160A
Publication Date:
February 25, 2015
Filing Date:
May 19, 2011
Export Citation:
Assignee:
三菱電機株式会社
International Classes:
H04L9/08; G06F21/62
Attorney, Agent or Firm:
Shoji Mizoi
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