Guttman method was first introduced in 1996 by Peter Gutmann from Auckland University New Zealand in his paper “Secure Deletion of Data from Magnetic and Solid-State Memory”. However, since our KillDisk does support Gutmann we find that some explanation is necessary, otherwise “why put something there if you are not using it?”. Many of our novice or semi-advanced users of our software have asked us about the famous or infamous Gutmann method and whether is it truly required for disks to be overwritten 35x for data to be securely sanitized once and for all? If you have read our blog on how to delete data you already know that US DoD 5220.22-M or any other method that has 3 passes is good enough for data sanitation. The Gutmann method or do you really need to overwrite your drive 35x to be safe?
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