Patent ID: 6314437
Filing Date: 2001-11-06
Classification: G06F,Y10S

Abstract:
A method for real-time secure file deletion in a system having an NTFS file system, comprising:monitoring read calls using a read filter and recognizing and storing pointers to NTFS metafiles and page files;monitoring write calls using a write filter and performing real-time secure data deletion of buffers;monitoring file creation operations and performing real-time secure data deletion of buffers;monitoring set information operations and performing real-time secure data deletion for truncated, shrunk or deleted user files;wherein performing real-time secure data deletion comprises overwriting data for a specified number of iterations, each iteration using a specified overwrite array; andmonitoring the file system to determine whether additional data overwriting is required for complete data deletion, including the deletion of any traces of said data remaining during or after the deletion process.