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as a tip, the american army melts their hard
drives to be sure that no one can recover the information that
they contain. Others use devices that are able of generate a
strong magnetic field, but it also destroys the hard drive. Not
all of us have these devices at our disposal, but happily, there
are programs that can do the job for us. |
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This might sound easy, but
generating random data with a computer is
not easy (because a PC is pre determined by
nature). Using a bad random number
generator, you might guess the following
numbers by simply examining past sequences.
What this means is that the usage of a bad
random number generator (PRNG) would allow
the
recovery of all of our data. |
Darik�s boot and Nuke�s program allows to use
Mersenne � Twister to
erase the
hard drives. You only have to start your PC from it and
launch the erase of the hard drive. Darik�s boot and Nuke bears
with XT, IDEa, PaTa, SaTa and SCSI disks, (http://prdownloads.sourceforge.net/dban/dban-1.0.7_i386.iso?download)
another tool that can also be helpful is a program called
Eraser, this software has a simple way of functioning: it over
writes several times in the files with patterns selected in a
way in which the recovery of the original information is
impossible. Among these patterns, we can select, for example,
the Guttmann pattern (the one selected by default), the
Pseudorandom Data pattern and the US DoD method (the one used by
the american army). besides, Eraser can be added as part of the
contextual menu of Windows Explorer and the Recycle bin, making
its usage simpler and more direct. Eraser is completely free of
charge, and there are several versions for Windows 95, 98, ME,
NT 4.0, 2000, XP, 2003 and windows Vista and its source code is
also available to be downloaded (http://eraser.heidi.ie/)
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