It would be a part of the algorithm, to make sure the overwritten file is readable. But if those machines get any smaller, I guess these would be the next generation of storage media take bluerays vs dvds for example.
On Tue, Jan 26, 2010 at 5:11 PM, T Biehn <[email protected]> wrote: > Overwritten files require analysis with a 'big expensive machine.' > I doubt they ever recover the full file. > > -Travis > > On Tue, Jan 26, 2010 at 11:04 AM, Christian Sciberras <[email protected]> > wrote: > > I was thinking, since all this (reasonable) fuss on wiping a disk over 10 > > times to ensure non-readability, how come we're yet very limited on space > > usage? > > If, for example, I overwrote a bitmap file with a text one, what stops > the > > computer from recovering/storing both (without using additional space)? > > Just a couple curiosities of mine. > > > > > > > > > > > > On Tue, Jan 26, 2010 at 4:08 PM, Michael Holstein > > <[email protected]> wrote: > >> > >> > By the way, does somebody knows about the flash memory? > >> > Is zeroing a whole usb key enough to make the data unrecoverable? > >> > > >> > >> No, wear-leveling (done at the memory controller level) will dynamically > >> re-map addresses on the actual flash chip to ensure a relatively > >> consistent number of write cycles across the entire drive. > >> > >> The only way to completely "wipe" a flash disk is with a hammer. > >> > >> Regards, > >> > >> Michael Holstein > >> Cleveland State University > >> > >> _______________________________________________ > >> Full-Disclosure - We believe in it. > >> Charter: http://lists.grok.org.uk/full-disclosure-charter.html > >> Hosted and sponsored by Secunia - http://secunia.com/ > > > > > > _______________________________________________ > > Full-Disclosure - We believe in it. > > Charter: http://lists.grok.org.uk/full-disclosure-charter.html > > Hosted and sponsored by Secunia - http://secunia.com/ > > > > > > -- > FD1D E574 6CAB 2FAF 2921 F22E B8B7 9D0D 99FF A73C > http://pgp.mit.edu:11371/pks/lookup?search=tbiehn&op=index&fingerprint=on > http://pastebin.com/f6fd606da >
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