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SubjectRe: Wanted: Secure-delete utility for Linux

On Tue, 22 Dec 1998, Charles Cazabon wrote:

> Actually, it's all-bits-zero, all-bits-one, all-bits-zero. This prevents
> people from reading the previous data from residual magnetic fields underneath
> a disk which has simply been wiped with zeroes, etc. The complete cycle for
> each bit is enough to minimize this risk.

'badblocks -w' does this multiple times. So someone could use badblocks to
do a secure deletion ...

- clifford

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