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    SubjectRe: partially encrypted filesystem


    On Thu, 4 Dec 2003, Jörn Engel wrote:
    >
    > Isn't that a problem already handled by all compressing filesystems?
    > Or did I miss something really stupid?

    Yes, compression and encryption are really the same thing from a fs
    implementation standpoint - they just have different goals. So yes, any
    compressed filesystem will largely have all the same issues.

    And compression isn't very easy to tack on later either.

    Encryption does have a few extra problems, simply because of the intent.
    In a compressed filesystem it is ok to say "this information tends to be
    small and hard to compress, so let's not" (for example, metadata). While
    in an encrypted filesystem you shouldn't skip the "hard" pieces..

    (Encrypted filesystems also have the key management issues, further
    complicating the thing, but that complication tends to be at a higher
    level).

    Linus
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