On Mon, Oct 20, 2003 at 06:58:36PM +0200, Erik Tews wrote: > On Sun, Oct 19, 2003 at 09:56:45PM +0200, jon@xxxxxxxxxxxxxxxxxx wrote: > > > > > > It doesnt shuffle the sectors arround > > > > > > > > > > Does this really provide more security ? > > > > > > > > Maybe, i'm not a cryptoanalyser, but GBDE does this, and i think they > > > > do it for a reason. The idea is that you can attack the encryption if > > > > you have "known plaintext", and a filesystem stores known meta data > > > > at a known location. > > > > > > This is correct, I think this is a fine idea, if the blocks a big enough > > > that this will not make the disk seek all the day. > > > > i'm not aware of how big blocks that GBDE uses. > > Usually, filesystems will try to save files with all sectors together in > one line. If you use for example 512 byte blocks and shuffle them all > over the disk, you will perhaps get less then 10% as usual while reading > a file. > > If you use 4 mb blocks like lvm does it (in old versions) you won't > notice anything. okay, but i still dont know what GBDE does. JonB