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Data Shredder
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Version
1.0.0.0
Data Shredder literally destroys files, free space and
your Recycle Bin contents instead of only deleting
them. That means your data contents once overwritten
and destroyed It can't be recovered.
The user therefore should be sure of the files,
folders .etc. he/she wants to shred.There are many
safeguards built into the Data Shredder program to
warn the user.Windows allocates clusters for new files
(and extending existing files) from one end of the
disk and moving towards the other end. Accordingly,
the user for example if deleting files near the end of
the disk, it might be very long before those clusters
get used again.Therefore, shredding a disk's free
space ensures that any deleted data stored in
unallocated clusters will be completely shredded, and
all the bits and pieces of left over data from deleted
files will be destroyed.Generally speaking Windows
stores files using two steps:A directory entry and A
series of one or more clusters on a disk.When the user
deletes a file using windows the file's data doesn't
actually get deleted from disk. Windows simply marks
the file's clusters as available for reuse, then marks
that file's directory entry as deleted (from the
directories available) by replacing the first
character of the file's name with a special character.
Now if those clusters don't get reused for another
file, they are vulnerable and can be retrieved by
those who know where and how to look for it.Adding one
byte to the directory that was deleted will allow the
retrieve of the entire file that has been deleted.
This is used in most of the "Unerase" utilities
functions. Data Shredder makes it virtually impossible
to retrieve data from a file because it literally
overwrites the file's data clusters before deleting
the file. A "quick" shred overwrites the file once,
filling its data clusters with zeroes. A "Thorough"
shred overwrites the file maximum 10 times, using
varying bit patterns each time.
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