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1993-07-20
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6KB
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177 lines
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BIRKEN SOFTWARE'S SUPER-DELETION UTILITY
Copyright (C) 1993, Birken Software. All rights reserved.
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INCLUDED FILES
--------------
SDEL-EX.EXE should have contained the following files:
1) SDEL.EXE - The powerful Super-Delete utility
2) SDEL.DOC - This document file
INTRODUCTION
------------
Thank you for downloading the first version of Birken Software's
Super-Delete utility. DOS 5.0 was the first DOS to come with a utility that
would undelete files erased in the past. If, for any number of reasons, you
accidently erased an important file, you could undelete it and fully
recover the lost information. Undelete can be very useful as long as it is
not abused! In an office environment where many important files are
transferred via disk to other work-stations, it is important to delete these
transfer copies. Undelete, however, gets around that! Other people can
easily get their hands on your not-really-erased information. If this is so,
how can you make sure that your files were deleted? SDEL.EXE is an
amazing and powerful utility that will prevent anyone from undeleting your
important materials.
HOW SUPER-DELETE WORKS
----------------------
Before you can understand how Super-Delete works you must first
understand how DOS' undelete utility works. When you erase a file normally,
using the "erase" or the "del" commands, DOS does not really get rid of them!
DOS simply tells the user that an erased file is not there any more. In
reality, however, all of the files' data is still intact on the disk. Later
that information will be overwritten by future files, but until then it is
undeletable. It can take from days to weeks, depending on computer usage,
for those files too be completely and safely overwritten.
Birken Software's Super-Delete utility will completely erase a
file or many files at one time. The secret of Super-Delete is too corrupt
the files to be deleted before it is deleted. Therefore, if a user manages
to undelete your files, they will NOT be intact. There is a four step
corruption and deletion process:
STEP 1: Fully randomly scramble the specific files
STEP 2: Join all the scrambled files into one overlapping file through a
renaming process
STEP 3: Shorten the length of the file to ZERO bytes
STEP 4: Delete the corrupted and joined file
If you try to delete something with Super-Delete, and then try to undelete
it, you may come up with a zero byte file called "_SUPER.DEL". It is last
anyone will ever see of your information.
HOW TO USE SUPER-DELETE
-----------------------
Birken Software's Super-Delete utility is almost fully self-explanatory.
If you type SDEL and press [ENTER] at the DOS prompt it will give you this
error message:
Incorrect Usage - Correct Usage: C:\>SDEL [filename]
As it states, the correct way to use SDEL is to type the file name to be
deleted, plus the extension (if there is one), also on the prompt.
To erase many files you can use wildcards ('*') in the file name. For
example:
SDEL *.BAK
which will Super-Delete any files with the extension .BAK in the current
directory.
FURTHER QUESTIONS
-----------------
If you have a specific question that I have not answered in this
document file please write me at:
BIRKEN SOFTWARE, INC.
SDEL FURTHER QUESTIONS
120 ONEIDA AVE.
DUMONT, NJ 07628-2112
Please include $0.35 to cover the return postage.
REGISTRATION
------------
SDEL-EX.EXE came with the unregistered version of Super-Delete.
If you plan to use and copy this utility you must register. You can register
by sending a donation to the author (advisable donation is $15.00) at
BIRKEN SOFTWARE, INC.
SDEL DONATIONS
120 ONEIDA AVE.
DUMONT, NJ 07628-2112
Soon after you will receive a slip of registration. By registering you will
always be informed on future versions and other Birken Software releases.
Please note that checks can be filled out to the name Birken.
SOURCE CODE AVAILABLE
---------------------
You can obtain the source code to Birken Software's Super-Delete Utility
by sending $15.00 to the author at:
BIRKEN SOFTWARE, INC.
SOURCE CODE - SDEL
120 ONEIDA AVE.
DUMONT, NJ 07628-2112
Super-Delete was written and compiled in Borland's Turbo C++. Please note
that checks can be filled out to the name Birken.
COMMENTS AND SUGGESTIONS
------------------------
This is the first version of Birken Software's Super-Delete. The author
would appreciate any suggestions or comments that would help to create
a better future version. If any bugs are found, please alert the author.
You can send your comments, suggestions, or discovered bugs to:
BIRKEN SOFTWARE, INC.
C/S/B SUPER-DELETE
120 ONEIDA AVE.
DUMONT, NJ 07628-2112
DISCLAIMER
----------
All Super-Delete users must agree to the following:
This software is provided "as is". All warranties relating to
this software are disclaimed, whether expressed or implied, including
without limitation any implied warranties of merchantability or fitness
for a particular purpose. Neither the author nor an agent of the author
will be liable for any special, incidental, consequential, indirect or
similar damages due to loss of data or any other reason, even if the
author or an agent of the author has been advised of the possibility of
such damages. In no event shall the author's or an agent of the
author's liability for any damages ever exceed the price paid for the
license to use this software, regardless of the form of the claim. The
person using this software bears all risk as to the quality and
performance of the software.
THIS IS SHAREWARE
-----------------
This file is currently Shareware. If you find no use for this file
please give SDEL-EX.EXE (the self extracting .ZIP) to a friend. Thank you!