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    • 23. 发明申请
    • Dynamic measurement of an operating system in a virtualized system
    • 虚拟化系统中操作系统的动态测量
    • US20080059726A1
    • 2008-03-06
    • US11513963
    • 2006-08-31
    • Carlos RozasRolf Neugebauer
    • Carlos RozasRolf Neugebauer
    • G06F12/00
    • G06F21/53G06F9/45533
    • Systems, methods, and media for dynamic measurement of operating systems in a virtualized system are disclosed. Some embodiments may include accessing a dirty bitmap associated with an operating system executing in a virtualized system where the dirty bitmap may include an indication of memory locations that have been modified since a previous access. Embodiments may also include analyzing the dirty bitmap to determine one or more memory locations associated with the operating system to measure and measuring the determined memory locations to produce measurements of the memory locations. Embodiments may also include performing an action based on the measurements of the memory locations. Other embodiments are disclosed and claimed.
    • 公开了用于虚拟化系统中的操作系统的动态测量的系统,方法和媒体。 一些实施例可以包括访问与在虚拟化系统中执行的操作系统相关联的脏位图,其中脏位图可以包括自先前访问以来已被修改的存储器位置的指示。 实施例还可以包括分析脏位图以确定与操作系统相关联的一个或多个存储器位置,以测量和测量所确定的存储器位置以产生存储器位置的测量。 实施例还可以包括基于存储器位置的测量来执行动作。 公开和要求保护其他实施例。
    • 28. 发明申请
    • Apparatus and method for memory encryption with reduced decryption latency
    • 减少解密延迟的存储器加密的装置和方法
    • US20050021986A1
    • 2005-01-27
    • US10603680
    • 2003-06-25
    • Gary GraunkeCarlos Rozas
    • Gary GraunkeCarlos Rozas
    • G06F12/08G06F12/14G06F21/00H04L9/32
    • G06F12/1408G06F12/0802G06F21/78G06F21/85H04L9/0637H04L2209/12
    • A method and apparatus for memory encryption with reduced decryption latency. In one embodiment, the method includes reading an encrypted data block from memory. During reading of the encrypted data block, a keystream used to encrypt the data block is regenerated according to one or more stored criteria of the encrypted data block. Once the encrypted data block is read, the encrypted data block is decrypted using the regenerated keystream. Accordingly, in one embodiment, encryption of either random access memory (RAM) or disk memory is performed. A keystream is regenerated during data retrieval such that once the data is received, the data may be decrypted using a single clock operation. As a result, memory encryption is performed without exacerbating memory latency between the processor and memory.
    • 一种减少解密延迟的存储器加密方法和装置。 在一个实施例中,该方法包括从存储器读取加密的数据块。 在读取加密数据块期间,根据加密数据块的一个或多个存储标准来重新生成用于加密数据块的密钥流。 读取加密的数据块后,使用再生的密钥流对加密的数据块进行解密。 因此,在一个实施例中,执行随机存取存储器(RAM)或磁盘存储器的加密。 在数据检索期间重新生成密钥流,使得一旦接收到数据,可以使用单个时钟操作来解密数据。 结果,执行存储器加密,而不会加剧处理器和存储器之间的存储器等待时间。