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    • 5. 发明申请
    • USING TRUSTED THIRD PARTIES TO PERFORM DRM OPERATIONS
    • 使用受信任的第三方执行DRM操作
    • US20090307780A1
    • 2009-12-10
    • US12133356
    • 2008-06-04
    • Kedarnath A. DubhashiKenneth S. Reneris
    • Kedarnath A. DubhashiKenneth S. Reneris
    • G06F21/00
    • G06F21/10
    • Various embodiments utilize a third party, such as a trusted third-party, to perform DRM operations such as “move” operations. In at least some embodiments, the trusted third-party is utilized for both “move” operations as well as local content access such as playback and the like. In at least some embodiments, a third-party maintains a database that includes an association of clients, content, and move version numbers. A client—termed a “source client” maintains at least a move version number locally in a secure fashion. The version number is incremented each time the source client performs a move operation. Both the source client and the third-party increment the version number each time a piece of content is moved. When the client attempts to perform a move operation, it contacts the third-party to ascertain the third-party's move version number. If the move version numbers match and the source client owns the license/content, then, in at least some embodiments, a move operation is permitted.
    • 各种实施例利用诸如可信第三方的第三方来执行诸如“移动”操作的DRM操作。 在至少一些实施例中,可信第三方被用于“移动”操作以及本地内容访问,诸如回放等。 在至少一些实施例中,第三方维护包括客户端,内容和移动版本号的关联的数据库。 客户端称为“源客户端”以安全的方式在本地保留至少一个移动版本号。 每次源客户端执行移动操作时,版本号都会增加。 每次移动一个内容时,源客户端和第三方都会增加版本号。 当客户端尝试执行移动操作时,它会联系第三方以确定第三方的移动版本号。 如果移动版本号匹配并且源客户端拥有许可证/内容,则在至少一些实施例中允许移动操作。