Some utilities let you overwrite
files multiple times with patterns of ones and zeroes, but computer forensic software may still recover them if the method used isn't strong enough.
Overwriting can be accomplished by various utility programs and commands that overwrite
files and free space on disks using alternating patterns of binary digits - 1s and 0s.
But any PC user who is trying to purge his or her system of confidential data will want to completely overwrite
the sectors on the hard drive where the data resides.
According to the CCEVS evaluation description FDRERASE is an application that runs under the IBM z/OS operating system on a mainframe computer that provides two CCEVS security validated disk erasure functions: ERASE and SECUREERASE that overwrite
DASD to ensure the risk of residual data remaining, if any, is appropriate with the risk of a person scavenging for that data.
Now more than ever Undelete saves users the time, trouble and aggravation it would take to recreate work lost due to improvident file deletions and/or file version overwrites
RestoreIT removes the lost productivity associated with accidental deletions, overwrites
, virus attacks and Windows(TM) crashes by instantly restoring lost files back to their previous state or rolling back the entire system to the last time the PC was in operation.
Disk Purge will then do three series of overwrites
on the entire storage device.
this data to make it virtually unrecoverable.
Because the worm overwrites
a victim's hard drive, most infected systems will crash or experience data corruption.
Fully configurable and easy to deploy, cyberCide supports 85 partition types, overwrites
both physical and logical drives and allows the user to select unique wipe methods for each space.