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When setting up Full Disk Encryption, Does DMCrypt salt the encryption key like TrueCrypt does on Windows? I question the strength of the encryption if no salting is done.

Asked by: 1781 views Ubuntu

Enjoyed your article about encryption Ubuntu 11.04: http://www.linuxbsdos.com/2011/05/10/how-to-install-ubuntu-11-04-on-an-encrypted-lvm-file-system/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+linuxbsdos+%28LinuxBSDos%29

I'm concerned that there was no reference to any salting being done to the encryption key.

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6 Answers



  1. gnuBabe on May 12, 2011

    Here’s a recent article on encryption and salting. It is not specific to disk encryption, but should be helpful – hopefully. See https://blog.mozilla.com/webappsec/2011/05/10/sha-512-w-per-user-salts-is-not-enough/

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  2. finid on May 11, 2011

    Don’t have the answer myself. It’s more involved than the average user would care about, but I’m still looking.

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  3. nickr on May 11, 2011

    I will. thanks for trying PhilTr :)

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  4. PhilTr on May 11, 2011

    @nickr:

    I do not know the answer. My guess is they do, or they use another mechanism that would make the encryption as secure as it can be. I know that does not help you very much, but that is the best I can do. I did some research, but could not dig up any useful info. If you do find something, please come back and share with us.

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  5. nickr on May 11, 2011

    Obviously, know one knows the answer. Why not just answer the question. It would take a couple seconds.

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  6. gnuBabe on May 11, 2011

    nickr,

    Your questions sound more like quizzes than genuine questions. I think that’s why finid is ignoring them.

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