NVM !?

Discussion in 'Computer Security' started by Rick Merrill, Jan 2, 2007.

  1. Rick Merrill

    Rick Merrill Guest

    I had not heard ANy of this - Yikes! - RM

    from http://tinyurl.com/sfat2

    Non-volatile Memory Guards Key Information
    DATE: 12-DEC-2006
    By Cameron Crotty
    What data lives in vPro NVRAM?

    If you're like me, as soon as you see a nifty new trick, you want to see
    what's going on underneath the hood. For example, reaching out to
    inventory a remote PC whether it's on or off is exciting stuff. I want
    to know where exactly that information is stored, and what else is in
    there. So let's dig a little deeper into the cozy little spot inside a
    PC built with Intel vPro technology.

    Every vPro-equipped PC comes with a section of nonvolatile memory (NVM)
    dedicated. The NVM is both physically and logically separate from the
    main memory banks available to the system OS—the only way into it is
    through the management engine. As its name implies, the NVM doesn't
    require power to maintain data integrity. It does draw a small amount of
    current when the PC is plugged in so that the information is accessible
    even when the PC is powered off.

    Click here to read more how Intel vPro helps IT communicate with desktop
    PCs.

    The NVM is divided into three segments. First, it hosts the signed
    encrypted management engine and the information used by the engine and
    Intel vPro technology. Second, the NVM stores a wealth of key system
    data, including hardware asset information, BIOS configuration
    information, a unique system ID, and an event log. All of this
    information is automatically updated each time the system goes through
    power-on self test (POST). The third segment of the NVM is reserved for
    use by third-party software—it's a place where vendors can store version
    numbers, configuration information, or any other data necessary.

    All three segments of the NVM are accessible regardless of the OS and
    power state of the PC, so long as the system is plugged in and is
    connected to the network. The management engine controls access to the
    NVM, while the second and third sectors contain data that IT
    administrators would need for hardware and software asset inventories,
    application or OS migrations, troubleshooting, and other activities.
    Rick Merrill, Jan 2, 2007
    #1
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