发明名称 |
Method and device for controlling distribution and use of digital works |
摘要 |
<p>Disclosed is a method and device for controlling distribution and use of a digital work stored together with an attached usage right information on a record carrier. The attached usage right information is encrypted or verified by using a hidden information which is changed at every change of said usage right information. The hidden information may be an encryption key used for encrypting the usage right information, or a checksum of a data block containing the usage right information. Thus, a 'copy and restore attack' is not successful, since it will lead to a mismatch between the hidden information and the restored usage right information.
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申请公布号 |
EP1843343(A3) |
申请公布日期 |
2010.11.10 |
申请号 |
EP20070113366 |
申请日期 |
2001.08.02 |
申请人 |
UQE, LLC |
发明人 |
TREFFERS, MENNO A.;STARING, ANTONIUS A. |
分类号 |
G06F12/14;G11B20/00;G06F1/00;G06F21/10;G11B20/10;G11B20/12;H04L9/08 |
主分类号 |
G06F12/14 |
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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