On Fri, Jan 23, 2009 at 07:39:25PM -0300, Faramir wrote: > Robert J. Hansen escribi??: > ... > > With a defrag, if you successfully rearrange 95% of the affected blocks > > then you've substantially improved your drive performance. Sure, it'll > > report that it's done 100%, but who cares, really? > > Not me ;) > > > With disk overwriting, if you successfully overwrite 95% of your > > sensitive data, you may still be putting yourself at substantial risk. > > Especially since it will report that it overwrote all your data. > > Ok, that answers my question. > > Usually I don't see thing from the same point of view than you, I > mean, usually I think about "secure deletion" if the file can't be fully > recovered by the use of a simple recovery tool (let's say, Norton > unDelete)... but of course, in other context, fragments of information > can be very dangerous and the attacker can bring the hdd to an > specialized lab... > In other words, if I intend to destroy the PhD thesis of my brother, > overwritting 50% of it would be more than enough to make him cry like a > baby. But if I intend to destroy the list of infiltrated agents of the > Rebel Alliance, even a 5% of the list would make Darth Vader be really > happy. > > To David Shaw: I didn't get your point, since both defragmenting and > overwriting files involve to be able to control what is written and > where is written... I think both concepts are related somehow.
This is incorrect. Defragmentation does not need to land on a exact place on the disk, and overwriting does. Defragmentation ignores remapped blocks, while overwriting cannot, etc. David _______________________________________________ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
