Messages in this thread | | | Date | Wed, 23 Dec 1998 14:28:46 +1300 | From | Chris Wedgwood <> | Subject | Re: Wanted: Secure-delete utility for Linux |
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On Tue, Dec 22, 1998 at 04:57:24PM -0500, Theodore Y. Ts'o wrote:
> There's a very good paper on the subject given at a Usenix Security > Symposium, I think 2 years ago. It showed exactly how much > information you could glean off of a magnetic disk platter using an > electron microscope to read out the old magnetic domains. It was > absolutely spooky --- he was able to read data that had been > written several write generations beforehand.
Sounds like Peters paper;
http://www.cs.auckland.ac.nz/~pgut001/pubs/secure_del.html
This paper was first published in the Sixth USENIX Security Symposium Proceedings, San Jose, California, July 22-25, 1996
Abstract
With the use of increasingly sophisticated encryption systems, an attacker wishing to gain access to sensitive data is forced to look elsewhere for information. One avenue of attack is the recovery of supposedly erased data from magnetic media or random-access memory. This paper covers some of the methods available to recover erased data and presents schemes to make this recovery significantly more difficult.
-cw
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