发明名称 |
Method and device for controlling distribution and use of digital works |
摘要 |
The present invention relates to 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 |
US2002023219(A1) |
申请公布日期 |
2002.02.21 |
申请号 |
US20010930654 |
申请日期 |
2001.08.15 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
TREFFERS MENNO ANNE;STARING ANTONIUS ADRIAAN MARIA |
分类号 |
G06F12/14;G06F1/00;G06F21/00;G06F21/10;G06F21/24;G11B20/00;G11B20/10;G11B20/12;H04L9/08;(IPC1-7):H04L9/00;G06F17/60 |
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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