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 _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
