[unisog] Wiping hard drives before computer transfer
Curtis K. Shrote
shrote at arlut.utexas.edu
Fri Jan 24 18:40:18 GMT 2003
Tom Perrine wrote:
> Peter Gutman in NZ has done about the best non-GOV work on recovering
> data from hard drives. All you need is a scanning tunnelling electron
> microscope, IIRC :-)
Yup, I'm aware of the electron microscope technique. I've used similar
tools IDS5000/7000 to probe microprocessors when debugging speed paths
etc. while they were running code loops. It was very tedious but fun
work. The chemistries/processing for stripping the SiO2 off the top of
the chips to get a look down to metal 1 (wire layer) were a nightmare.
I'm glad the product engineering team did that. These tools along with
power analysis are also a way to attack stored value $$ smartcard
chips/algorithms. However, don't count me as having experience in that area.
I hope the price of such equipment has gone down at least for Peter. My
tin cup isn't large enough to hold the bills unless it's in check form.
;-) I somehow doubt I would have the time to go as far as he has however.
Maybe I should resort to acid etching/washing the drive platters while
they spin at 7200rpm and calling it a day. ;-). Also, for a slight
parallel, there was somebody that published CD-ROM distruction
techniques at very high RPM (very humorous). Photos are somewhere on the
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