Messages in this thread | | | Subject | Re: Using compression before encryption in device-mapper | Date | Wed, 14 Apr 2004 17:02:53 +0200 | From | Pascal Schmidt <> |
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On Wed, 14 Apr 2004 16:10:20 +0200, you wrote in linux.kernel:
> Actually (see my reply to Timothy Miller) I really want to do "compression" > even if it does not reduce space: it is a matter of growing the per-bit > entropy rather than to gain space (see http://jsam.sourceforge.net).
How is the per-bit entropy higher when the same amount of data (and thus entropy on that data) is sometimes contained in *more* bits?
I can see the argument if data is really compressed, because then more bits than would normally fit into, say, a sector, contribute to the entropy of the final sector.
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