Thoroughly removing data from computer systems. Before getting
rid of a computer, security experts suggest that owners wipe all traces of data
from their machines by clearing caches
and logfiles, removing entries
from the directory, and overwriting erased areas on the hard disk at least
seven times with different bytes
to remove all magnetic traces.
Commercial wiping tools currently on the market include
Active@ Kill Disk, a DOS utility that completely destroys all data on hard
drives and floppy drives; CyberScrub, a utility offering secure deletion of
files; E-Cycle, a utility specializing in data destruction, wiping, and the
sanitizing of hard drives; File Shredder, a utility that wipes data by
overwriting it; Paragon Disk Wipe, a utility for securely eliminating data from
drives; and Wesco Development Group’s Automatic File Deletion System, a utility
working with Windows 95 and Windows NT to automatically delete user-defined
files. The open source version of a wiping tool is known as “eraser” and can be
found at http://www.heidi.ie/eraser/.
Bytes; Caches; Logfiles.