PROCEDURE FOR ERASURE OF DATA ON ELECTRONICAL DATA MEDIA

摘要

The invention relates to a method for a safer erasure of data on electronic data storage media with an electromagnetised surface by overwriting the previously stored data.To achieve a higher degree of security against reconstruction, the number of overwrites of each byte of the previously stored data is varied from time to time in a random manner. The invention also enhances lack of recognition by the selection of characters for each individual overwrite by means of a random number generator characterised by a very little degree of recognizable tendencies as far as patterns or regularity are concerned.