Melting - an interesting concept. Once the magnetic material passes its curie point, what would remain? Personally, I still like the way the plastic substrate vaporizes when it burns...
Jim [EMAIL PROTECTED] wrote: > > John, actually, we beat this topic to death about a year ago. Your good > knowledge of physics is misleading you. An extraordinary understanding of > physics provides us with tools such as Magnetic Force Scanning Tunneling > Microscopy which can recover data, with no theoretical limit of how many > times the medium is overwritten. Actual limitations are caused by the > sensitivity of the tools we can produce, rather than limitation of the > technique itself. > > See the below link and read about it from someone with both the > extraordinary understanding of physics plus the totally rare ability to > explain it in terms the layman can understand. > > http://www.usenix.org/publications/library/proceedings/sec96/full_papers/gut > mann/ > > Moderator, please don't let this thread devolve into an argument about when > you need to melt the disk and when formatting or breaking it up is good > enough. (We spent a week just on how small the pieces should be. Over 500 > posts) > > D. Weiss > CCNA/MCSE/SSP2 > > -----Original Message----- > From: John Orr [mailto:JOrr@;austinbank.com] > Sent: Tuesday, October 29, 2002 7:15 PM > To: [EMAIL PROTECTED]; [EMAIL PROTECTED] > Subject: Re: Interesting One > > Personally, I think he is full of... hot air. > > Bits are either "on" or "off", "1" or "0". If you change that pattern > (i.e. write over the same data area with a different sequence of bits), then > the previous state of that field would not be determinable. Granted, there > may be some residual magnetic field left on a particular area that is now > "0" that had been "1", but the converse would not be true. There would be > no residual field to read on an area that is now "1" that had been "0". > > Sounds like sales fluff to me. > > Anyway, that is my opinion, based on years of experience and a good > knowledge of physics. > > -John > > -------------------------------------- > John Orr > VP/CIO > Austin Bank > 903.759.3828 x2113 > 903.297.3094 fax > [EMAIL PROTECTED] > > >>> "Dave Adams" <[EMAIL PROTECTED]> 10/28/02 04:06PM >>> > Greetings Folks, > > I had an interesting conversation today with someone from FAST > (Federation > Against Software Theft) They pretend not to be a snitch wing of the BSA. > Anyway, to get to the point, the guy that came to see me said that their > forensics guys could read data off a hard drive that had been written > over > up to thirty times. I find this very hard to believe and told him I > thought > he was mistaken but the guy was adamant that it could be done. My > question > is, does anyone have any views on this, or, can anyone point me to a > source > of information where I can get the facts on exactly how much data can be > retrieved off a hard drive and under what conditions etc etc. > > Thanks > > Dave Adams > > This message (and any associated files) is intended only for the > use of the individual or entity to which it is addressed and may > contain information that is confidential, subject to copyright or > constitutes a trade secret. If you are not the intended recipient > you are hereby notified that any dissemination, copying or > distribution of this message, or files associated with this message, > is strictly prohibited. If you have received this message in error, > please notify us immediately by replying to the message and deleting > it from your computer. Messages sent to and from > John Crowley (Maidstone) Ltd may be monitored. > > Internet communications cannot be guaranteed to be secure or error-free > as information could be intercepted, corrupted, lost, destroyed, arrive > late or incomplete, or contain viruses. Therefore, we do not accept > responsibility for any errors or omissions that are present in this > message, or any attachment, that have arisen as a result of e-mail > transmission. If verification is required, please request a hard-copy > version. Any views or opinions presented are solely those of the author > and do not necessarily represent those of John Crowley (Maidstone) Ltd. -- James W. Meritt CISSP, CISA Booz | Allen | Hamilton phone: (410) 684-6566
