retain FV encryption key from before on fresh install?

Discussion in 'OS X Mavericks (10.9)' started by expat42451, May 31, 2014.

  1. expat42451 macrumors regular

    Joined:
    Oct 25, 2013
    Location:
    where my backpack is
    #1
    I currently am running 10.9.3 with File Vault on. I do weekly backups to an external drive.

    10.9.3 is a result of updates several several generations deep- i.e. all the way back to Lion. I would like to wipe the drive and do a fresh install- however the external drive is encrypted as well. I am curious abut how, using File Vault, this is handled, whether one has an opportunity to enter the old key for use on the new install- and whether or not one still has access to the encrypted backup disk after the new install? Does File Vault de facto generate a new encryption key on a new install or can one use the old key?

    I did a search for this here and came up empty handed. Thanks.

    Expat42451
     
  2. FreakinEurekan macrumors 68040

    FreakinEurekan

    Joined:
    Sep 8, 2011
    Location:
    Eureka Springs, Arkansas
    #2
    FileVault and Time Machine encryption are totally independent. The data is "Decrypted" from FileVault at the time it's sent to your TM backup - so you can restore to an encrypted or decrypted drive, it doesn't know the difference.
     
  3. expat42451 thread starter macrumors regular

    Joined:
    Oct 25, 2013
    Location:
    where my backpack is
    #3
    FreakinEurekan

    Thanks for the information. I was under the impression that when File Vault was enabled, that the back up drive was also encrypted with the same key.

    That is definitely good to know. Also good to know that a nuke, pave, reinstall and restore shouldn't be a problem.

    Many thanks

    Expat
     

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