Messages in this thread | | | Date | Tue, 03 Feb 2015 09:01:36 +0100 | From | Alexander Holler <> | Subject | Re: [PATCH 1/5] WIP: Add syscall unlinkat_s (currently x86* only) |
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Am 03.02.2015 um 08:56 schrieb Al Viro:
> While we are at it, "overwrite with zeroes" is too weak if the attacker > might get hold of the actual hardware. Google for details - it's far too > long story for l-k posting. Look for data recovery and secure data erasure...
You might read
http://link.springer.com/chapter/10.1007/978-3-540-89862-7_21
Here is an article in german about that:
http://www.heise.de/security/meldung/Sicheres-Loeschen-Einmal-ueberschreiben-genuegt-198816.html
In short, it's enough to overwrite it once with zeros,
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