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Thread: Full disk encryption, suspend, and hibernate

  1. #1
    Join Date
    Nov 2007
    Beans
    7
    Distro
    Ubuntu 9.10 Karmic Koala

    Full disk encryption, suspend, and hibernate

    I didn't know where else to put this. I thought that some of you (and any future googlers) might be interested to know that over the weekend I went with the default LUKS install of 9.04 on a new computer, and hibernate/suspend work just fine. It seemed like people were unsure of whether that was true or not when I read this thread.

    Context (the only configuration I know works for sure):
    Ubuntu 9.04, 64-bit alternate install CD with all default settings for LUKS full disk encryption
    No other Operating Systems or distros
    Dell Studio XPS 13 (aka 1340)
    256 GB Dell-branded SSD
    NVIDIA GeForce 9400M
    Restricted drivers for NVIDIA and Broadcom

    Everything went smoothly and worked perfectly pretty much from the get-go. I'm assuming it wouldn't be too difficult to get this to work properly with a more customized partition scheme, dual booting, etc. I'm also seeing no perceptible loss in performance.

    When you wake from hibernation, you have to give passphrase to decrypt, just like booting normally.

    From what I understand, though - suspend still stores the crypto key somewhere in memory so your machine is still vulnerable in this state. Still, it's really convenient to have, and users should be able to weigh the costs/benefits and make their own decisions on whether (and if so, when) to use suspend or not.

    Thanks to everyone who has given information, put together tutorials, etc. on full disk encryption on this forum. I read probably hundreds of posts from dozens of threads before I really felt confident doing this.

  2. #2
    Join Date
    Apr 2008
    Beans
    49
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: Full disk encryption, suspend, and hibernate

    thanks, shaneh. I'm going to do this when Karmic is released.

    Whole disk encryption FTW!

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