Invention Grant
US07716745B2 Binding a digital license to a portable device or the like in a digital rights management (DRM) system and checking out/checking in the digital license to/from the portable device or the like
失效
将数字许可证绑定到数字版权管理（DRM）系统中的便携式设备等，并且从便携式设备等检查/检查数字许可证
- Patent Title: Binding a digital license to a portable device or the like in a digital rights management (DRM) system and checking out/checking in the digital license to/from the portable device or the like
- Patent Title (中): 将数字许可证绑定到数字版权管理（DRM）系统中的便携式设备等，并且从便携式设备等检查/检查数字许可证
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Application No.: US12135944Application Date: 2008-06-09
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Publication No.: US07716745B2Publication Date: 2010-05-11
- Inventor: Marcus Peinado
- Applicant: Marcus Peinado
- Applicant Address: US WA Redmond
- Assignee: Microsoft Corporation
- Current Assignee: Microsoft Corporation
- Current Assignee Address: US WA Redmond
- Agency: Woodcock Washburn LLP
- Main IPC: G06F7/04
- IPC: G06F7/04 ; G06F17/30 ; H04N7/16
Abstract:
To render digital content encrypted according to a content key (KD) on a first device having a public key (PU1) and a corresponding private key (PR1), a digital license corresponding to the content is obtained, where the digital license includes the content key (KD) therein in an encrypted form. The encrypted content key (KD) from the digital license is decrypted to produce the content key (KD), and the public key (PU1) of the first device is obtained therefrom. The content key (KD) is then encrypted according to the public key (PU1) of the first device (PU1 (KD)), and a sub-license corresponding to and based on the obtained license is composed, where the sub-license includes (PU1 (KD)). The composed sub-license is then transferred to the first device.
Public/Granted literature
Information query
