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Thread: Ubuntu 12.10 full disk encryption question

  1. #1
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    Oct 2012
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    Ubuntu 12.10 full disk encryption question

    Hello.

    I was wondering what information is available on the type of encryption Ubuntu offers when using its new full-disk encryption. Is it similar to TrueCrypt? Is there any information about the algorithms, hashes, etc at all? I've tried to Google the answer but nothing really comes up other than the fact that full encryption is possible. How strong is the Ubuntu 12.10 encryption?

    Thank you for any feedback.

    Sfs

  2. #2
    Join Date
    Aug 2011
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    Ubuntu 12.04 Precise Pangolin

    Re: Ubuntu 12.10 full disk encryption question

    It is similar to TC except it uses LUKS system, I do all my laptops this way.

  3. #3
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    Oct 2012
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    Re: Ubuntu 12.10 full disk encryption question

    Ah, gotcha. Thank you for the fast and helpful response! Much appreciated friend.

    Sfs

    Quote Originally Posted by Linuxisfast View Post
    It is similar to TC except it uses LUKS system, I do all my laptops this way.

  4. #4
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    Re: Ubuntu 12.10 full disk encryption question

    One more thing: I read up on LUKS just now and am curious: is it 256 bit keys (AES) for Ubuntu 12.10?
    (default key size)
    I prefer 256 AES whenever possible, just curious - thanks!

    Sfs

  5. #5
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    Ubuntu 12.04 Precise Pangolin

    Re: Ubuntu 12.10 full disk encryption question

    Quote Originally Posted by soundsfromsound View Post
    One more thing: I read up on LUKS just now and am curious: is it 256 bit keys (AES) for Ubuntu 12.10?
    (default key size)
    I prefer 256 AES whenever possible, just curious - thanks!

    Sfs
    Its 256-bit AES encryption in cipher-block-chaining mode.

  6. #6
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    Oct 2012
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    Re: Ubuntu 12.10 full disk encryption question

    Wonderful, thank you again!

    Quote Originally Posted by Linuxisfast View Post
    Its 256-bit AES encryption in cipher-block-chaining mode.

  7. #7
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    Re: Ubuntu 12.10 full disk encryption question

    Can I ask you one last question please?

    So, if I encrypt my entire Linux laptop using the default Ubuntu 12.10 method, can't someone just bypass this entirely by using a LiveCD? You know how you can easily bypass any Windows machine using a LiveCD and retrieve files that way?

    How does a LiveCD work against full disk encryption? Is there any true way to block the use of a LiveCD being able to read/access files on a machine?

    Thank you so much for helping me with this.

    Sfs

    Quote Originally Posted by Linuxisfast View Post
    Its 256-bit AES encryption in cipher-block-chaining mode.

  8. #8
    Join Date
    Jan 2008
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    Ubuntu 12.04 Precise Pangolin

    Re: Ubuntu 12.10 full disk encryption question

    Quote Originally Posted by soundsfromsound View Post
    Can I ask you one last question please?

    So, if I encrypt my entire Linux laptop using the default Ubuntu 12.10 method, can't someone just bypass this entirely by using a LiveCD? You know how you can easily bypass any Windows machine using a LiveCD and retrieve files that way?

    How does a LiveCD work against full disk encryption? Is there any true way to block the use of a LiveCD being able to read/access files on a machine?

    Thank you so much for helping me with this.

    Sfs
    A LiveCD wont help anyone read the data on the encrypted drive. The only thing they could do would be to destroy your data, but reading it is out of the question unless they have the crypto key.
    Occam's Razor for computers: Viruses must never be postulated without necessity -- nevius

    My Blog

  9. #9
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    Oct 2012
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    Re: Ubuntu 12.10 full disk encryption question

    Oh, that's great to hear. I thought you could bypass any OS (pretty much every "normal" machine) with a Linux LiveCD and at least access/retrieve files. Nice to hear encryption will do the trick and prevent LiveCD-ness, thanks!

  10. #10

    Re: Ubuntu 12.10 full disk encryption question

    Quote Originally Posted by soundsfromsound View Post
    Oh, that's great to hear. I thought you could bypass any OS (pretty much every "normal" machine) with a Linux LiveCD and at least access/retrieve files. Nice to hear encryption will do the trick and prevent LiveCD-ness, thanks!
    You can do this as long as data is not encrypted.

    That's why encryption comes in!

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