Bruce Barwise
Guest
Joined: 26 Mar 2005
Posts: 8
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| Posted: Mon Apr 04, 2005 10:16 am Post subject: Re: the algorithms |
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Bill Smith wrote: I''d like to know what are the algorithms of secure deletion? There are several algorithms of secure deletion:
1) Single pass - data area is overwritten once with \"1\" or \"0\".
2) DoD Method - the data area is overwritten with 0''s, then 1''s and then once with pseudorandom data.
3) Guttman Method - the data area is overwritten 35 times. This method overwrites the drive taking
into account the different encoding algorithms used by various hard drive manufacturers.
4) NSA erasure algorithm - data is overwritten seven times with \"0\" pattern then with \"1\" and so
on. It is the best method for quick and secure deletion (QuickWiper can do it). |
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