Mac TimeMachine and FileVault encryption

When using Mac Lion FileVault is the TimeMachine backup encrypted or unencrypted?

I have FileVault turned on so my boot disk should be encrypted. I have not turned on TimeMachine encryption.

Phrased differently, are the TimeMachine backup files stored in encrypted or unencrypted state?
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  • Hi Randolph,
    is your question directly pertaining to a lesson in one of our books on OS X Lion or is it a general question?
    If it's a question in one of our books, which one and which lesson page is it? If it's a general question about Mac TimeMachine and FileVault encryption your best bet is to contact apple support as we are unfortunately unable to offer general tech support for apple software.

    Cheers,
    Tai Hake
    Customer Service Rep,
    O'Reilly Media
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  • I have the David Pogue book "Mac OS X Lion the missing manual" and expected a clearer explanation of file encryption than I've found. The section on FileVault (starting on p 512) explains that the disk is encrypted when FileVault is turned on, pretty straightforward. It does not explain in terms that I understand what "unlocking" the disk actually means, but that is not what my question was driving at. When I look at the TimeMachine section (starting on p 261) it does not explain whether encrypted disk data is backed up (i.e. an encrypted disk sector copy from HD to backup) or the files are read, decrypted, and stored in the clear unless TimeMachine encryption is also turned on. I suspect the latter, but am looking for clarification.
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  • Hi Randolph,
    I've escalated this to our booktech staff so that they can take a look and get some clarification for you.
    Sorry about the delay in responding to you.
    You can contact them directly at booktech@oreilly.com for any further questions or requests for clarification.

    Tai
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