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    • 4. 发明申请
    • FILE SYSTEM OPERATION AND DIGITAL RIGHTS MANAGEMENT (DRM)
    • 文件系统操作和数字权限管理(DRM)
    • US20120117662A1
    • 2012-05-10
    • US13352038
    • 2012-01-17
    • David B. CrossPaul J. Leach
    • David B. CrossPaul J. Leach
    • G06F17/30
    • G06F17/30067
    • A file system is configured for use with files protected by digital rights management (DRM) content controls and to interact both with applications that are, and are not, DRM aware. The file system may be configured for use by two applications, in a manner that may provide the second application with protected files if the first application was previously allowed access. In one example, a user context cache of DRM-protected files is created. The files in the cache may have been decrypted in response to a request(s) from the first application. Subsequent requests from the second application may be received for files within the user context cache of DRM-protected files. At least one of the files within the user context cache of DRM-protected files may be provided to the second application if the second application has a joint user context with the first application.
    • 文件系统被配置为与受数字权限管理(DRM)内容控制保护的文件一起使用,并且与DRM感知的应用程序进行交互。 文件系统可以被配置为由两个应用程序使用,其方式可以是如果第一应用程序以前被允许访问则可以向第二应用提供受保护的文件。 在一个示例中,创建DRM保护文件的用户上下文高速缓存。 响应于来自第一应用的请求,缓存中的文件可能已被解密。 可以针对受DRM保护的文件的用户上下文高速缓存中的文件接收来自第二应用的后续请求。 如果第二应用具有与第一应用的联合用户上下文,则DRM受保护文件的用户上下文高速缓存内的至少一个文件可以被提供给第二应用。
    • 5. 发明授权
    • File system operation and digital rights management (DRM)
    • 文件系统操作和数字版权管理(DRM)
    • US08117666B2
    • 2012-02-14
    • US12131884
    • 2008-06-02
    • David B. CrossPaul J. Leach
    • David B. CrossPaul J. Leach
    • H04L9/32
    • G06F17/30067
    • File system interaction with digital rights management (DRM) is facilitated by enabling one or more file system components to be DRM-aware. These one or more file system components may be part of a computer operating system. An exemplary system implementation includes: one or more processors; and one or more media in operative communication therewith, the media storing one or more file system components that are configured to provide content having DRM controls to a requesting program in either a raw form or a decrypted form in dependence on whether the DRM controls comprise simple DRM content controls or complex DRM content controls. In another exemplary system implementation, the one or more file system components are configured to provide files with simple DRM content controls to requesting applications in a decrypted form and to provide files with complex DRM content controls to requesting applications in an unaltered form.
    • 通过使一个或多个文件系统组件成为DRM感知来促进与数字版权管理(DRM)的文件系统交互。 这些一个或多个文件系统组件可以是计算机操作系统的一部分。 示例性系统实现包括:一个或多个处理器; 以及与其操作通信的一个或多个媒体,所述媒体存储一个或多个文件系统组件,其被配置为根据DRM控件是否包括简单的形式,以原始形式或解密形式向请求程序提供具有DRM控制的内容 DRM内容控件或复杂的DRM内容控件。 在另一示例性系统实现中,一个或多个文件系统组件被配置为提供具有简单DRM内容控制的文件,以解密形式来请求应用程序,并且提供具有复杂DRM内容控制的文件以以未改变形式请求应用程序。
    • 9. 发明授权
    • Encryption of system paging file
    • 加密系统页面文件
    • US07325115B2
    • 2008-01-29
    • US10721562
    • 2003-11-25
    • Benjamin A. LeisDavid B. CrossDuncan G. BryceJianrong GuRajeev Y. NagarScott A. Field
    • Benjamin A. LeisDavid B. CrossDuncan G. BryceJianrong GuRajeev Y. NagarScott A. Field
    • G06F12/00
    • G06F12/145G06F21/62G06F21/6281G06F21/80G06F2221/2143
    • An operating system copies data from memory pages into a paging file on disk, in order to free up space in the memory. A mechanism is disclosed that causes the data to be encrypted as it is copied into the paging file, thereby protecting the paged data from unauthorized (or otherwise undesired) observation. The data that is stored in the paging file is encrypted with a session key, that is generated shortly after the machine on which the paging file exists is started. The session key, which is used both for encryption and decryption of the paging file data, is stored in volatile memory, so that the key is not persisted across boots of the machine. Since the key is not persisted across boots, old paging file data that was stored prior to the most recent boot cannot be recovered in clear text, thereby protecting the data from observation.
    • 操作系统将数据从内存页复制到磁盘上的页面文件中,以释放内存中的空间。 公开了一种机制,使得数据在被复制到寻呼文件中时被加密,从而保护分页数据免受未经授权(或以其他方式不希望的)观察。 存储在页面文件中的数据使用会话密钥进行加密,会话密钥是在启动了分页文件的计算机之后不久生成的。 用于分页文件数据的加密和解密的会话密钥存储在易失性存储器中,使得密钥不会在机器的引导上持久存储。 由于密钥在整个引导过程中不会持久存在,所以在最新引导之前存储的旧页面文件数据无法以明文形式恢复,从而保护数据免受观察。