Some data erasure programs use the so-called Pfitzner method to overwrite existing information on a hard disk or another storage medium. It is a software-based data erasure standard.
The Pfitzner data erasure method is usually implemented as follows:
Pass 1 to Pass 33: Overwriting the data with a random character.
Upon the erasure of a data storage medium by means of the Pfitzner method, all software-based and hardware-based restoration methods should fail. This data erasure method was originally published by Mr. Roy Pfitzner.