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Super Shredder And Other File Shredders For Permanent File Deletion

When you delete a file from your computer, itWhat this means is that no recognizable
may seem permanent and irreversible enough,traces of the shredded file remains on the
but in fact it isn't. It is still possible tohard  disk  after  deletion.
recover this data through a variety of means,
using software designed for this purpose.This can be better understood by realizing
This may be helpful for accidental deletions,that the data contained within any type of
but when private or confidential data isfile can be reduced, fundamentally, to some
involved, this represents securityseries of 1's and 0's that then form bits and
vulnerability.bytes. Ordinary file deletion leaves the
majority of this sequence of bits unchanged,
File deletion works by just changing the tagchanging only the small portion of it
on a particular file to the value 'deleted',corresponding to the "deleted" or "available"
and making it inaccessible from the defaultmetatag. File shredders, on the other hand,
set of menus and directories. However, theoverwrite these bits with random bits,
data and the file itself actually remain oneffectively masking the old pattern that was
the hard disk, and only disappear when it iscontained  in  the  shredded  file.
overwritten in the future by new data. But
this overwriting may not happen until afterBecause nearly all traces of the original
the  file  data  has  already been recovered!data are wiped clean, it becomes next to
impossible to retrieve any useful information
In fact, some operating systems have afrom files shredded in this manner. Many file
built-in UNDELETE command, which can easilyshredders perform this random overwriting
recover recently deleted files. Hence, thisprocess several times to ensure that the
really is a big vulnerability that can beresultant pattern is truly random, and is no
exploited by malicious parties to gain accesslonger  correlated  with  the  old  data.
to  confidential  or  private  information.
These file shredders can sometimes also deal
An analogous problem arises in disposing ofwith entire hard disks at once. This is
confidential paperwork, and the typicaluseful when disposing of or transferring old
solution is to use so called paper shredders.computers, for instance, to ensure that no
These shredders tear the paper into finerecoverable data remains on the hard disk.
strips which are then nearly impossible toThese hard disk wipes work on the same basic
reconstruct the original from. The solutionprinciple as shredding an individual file:
to the digital counterpart of the problemall of the data on the hard disk is
lies  in  software,  also  called  shredders.overwritten  with  random  bits.
These utilities are known as file shreddersMany file shredders (super shredder, for
(examples include Super Shredder, amonginstance, but there are others) are available
others), and are designed to permanentlyfor download or purchase on the internet.
delete any particular file or group of files.This means that secure deletion is easier
This is done by overwriting the actual datathan ever to perform.
in the file to be deleted with random data.



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