SDC: Secure deletion classification

This paper introduces a novel perspective by classifying the secure deletion methods into four categories based on their methodology. For each of the proposed deletion category its associated algorithm is explained and its merits and demerits are listed down. The deletion algorithm for each category have been simulated and evaluated with respect to security level and time complexity on commonly used file formats. Based on the results derived, the application scenarios suitable for each of the deletion category are presented. This research is likely to help the user make a more informed choice of the deletion method suitable for his need.