发明名称 |
Content revocation and license modification in a digital rights management (DRM) system on a computing device |
摘要 |
Content revocation is achieved by disabling licenses issued to a computing device for the content. A content revocation is delivered within a license to the computing device. Upon license storage the content revocation is recognized, validated, and stored in a secure state store under the public key of the content server (PU-CS) that issued the content. Each license has a (PU-CS) therein, and each license evaluation considers each content revocation stored in the state store and having the same (PU-CS). The license is disabled or otherwise affected based on the considered content revocation. A content revocation is one form of a license modification that may be delivered within a license.
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申请公布号 |
US2003187801(A1) |
申请公布日期 |
2003.10.02 |
申请号 |
US20020108285 |
申请日期 |
2002.03.26 |
申请人 |
MICROSOFT CORPORATION |
发明人 |
CHASE CHARLIE DAVID;GANESAN KRISHNAMURTHY;LAFORNARA PHILIP J.;MCKUNE JEFFREY RICHARD;STROM CLIFFORD PAUL;GAJJALA VIJAY K. |
分类号 |
G06F21/00;(IPC1-7):G06F17/60 |
主分类号 |
G06F21/00 |
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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