[dm-crypt] (OT) Secure data wipe

Karol Babioch karol at babioch.de
Sun Dec 9 15:48:01 CET 2012


Hi,

Am 09.12.2012 13:26, schrieb Javier Juan Martínez Cabezón:
> overwritting unallocated space several times

this basically is a myth. Overwriting the whole drive just one time will
make any recovery practically impossible, see [1].

The "multiple times" aspect to my best knowledge originates from the
good old days, where the density of tracks on floppies wasn't as high as
it is with todays hard drives and it was possible to "miss" the track by
some amount.

Best regards,
Karol Babioch

[1]
http://www.h-online.com/security/news/item/Secure-deletion-a-single-overwrite-will-do-it-739699.html

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