On Aug 21, 2008, at 10:54 PM, Faramir wrote:
Atom Smasher escribió:

that's basically what sfill (part of the srm package from thc) does, per
partition. the other way of doing basically the same thing:
 dd if=/dev/urandom of=/partition/tmp-file ; rm /partition/tmp-file

 Now, a lot of coffee cups latter, I am thinking maybe it is harder to
"securely" delete a single file than a whole disk or partition... since
with just 1 file, you must overwrite the place where the file is
located, and if we want to erase the whole disk, it should be matter of filling it up to full capacity with some debris data... there is no need
to "aim" to a specific spot...

Exactly right. Shredding a whole disk is like using a hammer. Shredding a single file involves a scalpel. It's a lot harder - not impossible, but harder - to use a scalpel.

David


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