发明名称 |
Information managing method, information managing system, server apparatus, and recording medium |
摘要 |
At a seller, an encryption device encrypts content data stored in a content server using an encryption key generated by an encryption key generation device, and records the encrypted content data and a communication program on a recording medium. A paper indicating an identification code unique to each recording medium is attached to the recording medium. A decryption key corresponding to the encryption key and the identification code are registered in a managing database. A user terminal sends the identification code to a decryption key managing server apparatus via Internet in accordance with the communication program, in a case where the user terminal is to copy or install or reproduce the content data stored on the recording medium. The decryption key managing server apparatus sends a decryption key corresponding to this identification code to the user terminal. The user terminal decrypts the content data using the decryption key sent thereto. |
申请公布号 |
US8090960(B2) |
申请公布日期 |
2012.01.03 |
申请号 |
US20060493849 |
申请日期 |
2006.07.27 |
申请人 |
OKAWA TAKESHI;RICOH COMPANY, LTD. |
发明人 |
OKAWA TAKESHI |
分类号 |
G06F17/30 |
主分类号 |
G06F17/30 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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