Data Shredding Solutions

Shredding computer data: just like sensitive data on paper needs to be destroyed, so too is there a need to shred electronic data from computers.  It is simply amazing how much data is stored in such a small place and how recoverable this data is if not completely wiped out! 

For computers, the equivalent of shredding is called wiping.  If data is wiped from a computer it means that cannot be restored by any means.

Data wiping can be accomplished by using software which overwrites files or by using a secured only command instead of the regular daily command to the operating system.

Why just deleting a document or file doesn’t work:

On many computers and the many standard operating systems, simply deleting a file and sending it to the trash bin will not delete the contents of the file it all! It may show that new space is available on the disk and it may show the file as removed from the operating system index, when in fact only the reference to the document was removed well actual contents remain somewhere on the hard disk.

This allows for easy recovery of recently deleted files with various software tools or MS DOS commands!

Sometimes the files may be overwritten or partially overwritten and become unrecoverable, but there may still be traces, and with the right equipment and knowledge, much of this data can be mined from the hard disk.

The Unix operating system has a built in delete command which can be used, and there are various files deleting programs available for windows systems which overwrite the data repeatedly with random binary code to make recovery extremely difficult.  It intersperses random binary into the files and makes it so random that it is like it is deleted.

However it can be possible that after files have been deleted the files may move! In some cases, this may render shredding software ineffective because it doesn’t know where to locate the specific data to be overwritten.

Thus, many people say that really the only absolute ways to permanently get rid of data on the hard drive is the burn it, pour acid on it, or degaussing!

Disc encryption is another method available to increase the security of your data. There’s a program called PGP which can encrypt data before it is stored on a hard disk.  The PGP or “Pretty Good Privacy” is an encryption program for cryptographic privacy and authentication.  It’s pretty close to military grade encryption and can be used to protect data in long-term storage such as disk files. It requires a pass phrase to recover encrypted information

Other Data Storage Devices To Wipe:

Another device to look out for is flash memory devices, such as key ring size USB drives and memory cards. Data stored on these devices can often be recovered even after it has been erased. As of the time of this article there is no official method for destroying these devices. Overwriting may help, but pulverizing is probably the safest option.

Due to the small size of these devices they are extremely easy to misplace drop or forget about… They also easy to steal or smuggle. In Iraq hundreds and hundreds of these devices were stolen which contained sensitive data about US troops! It is thought that these were smuggled out in the pockets of Iraqi locals working and sold on the black market.

Care must be taken with these devices, and people who use these devices to transport data should realize that the extremely small size comes with a price:  They are hard to keep track of!  Sometimes, smaller is not better!