Subj : New News About Secure Delete (wiping)
To   : All
From : warmfuzzy
Date : Thu Sep 08 2022 19:08:10

It has come to my attention that wiping a drive with zeros (zero'ing out a drive) does not actually provide a sufficient degree of security in keeping your data safe.  I've learned that using some commercial software hard drives can be made to reveal the data that they store even though zeros are written over their data.  This is because of "offset" --- the HDD would compensate to the zero'ing of the drive by using forensic technology that reads the remainder of the electromagnetic signature, so get the magnetic write, minus the zero'ing, and you're left with the data that was there before without much or any loss in the retrieved data at all.  Its quite a tricky thing but it works.  So when you're secure deleting your files I'd recommend (at the very least) to do a PRNG (pseudo-number generator) of three wipes with a zero-ing out after the PRNG is done.  I hope this helps keep your data secure.

Cheers!
-warmfuzzy

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