Jan 012018
 
A simple password utility to restrict access to a computer.
File PASS20.ZIP from The Programmer’s Corner in
Category System Diagnostics
A simple password utility to restrict access to a computer.
File Name File Size Zip Size Zip Type
PASSBOOT.DOC 8129 2521 deflated
PASSBOOT.EXE 49347 28045 deflated

Download File PASS20.ZIP Here

Contents of the PASSBOOT.DOC file


PASSBOOT Version 2.0 - 6/90 (c) Bob Whitson
Compuserve ID: 73310,2374

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PROPER USAGE:
PASSBOOT ...... The Password Program
PASSBOOT ? ...... HELP screen
PASSBOOT CHANGE ...... Change Password

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This program is not free! - it is provided under the 'SHAREWARE' concept.
However, it may be freely copied and uploaded to BBS systems
providing the program and all related files are not modified
in any way and providing both the EXE and DOC files are included.
IF YOU USE THIS PROGRAM, PLEASE SEND $10.00 TO THE AUTHOR AT:

Bob Whitson
504 Tinker Drive
Midwest City, Ok. 73110

THANKS !
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PROGRAM DESCRIPTION:

A password utility to restrict access to a computer. For use at power up
to restrict complete access to a computer or in batch files to restrict
access to certain programs.

PASSBOOT was written as a solution to the dilemma between total computer
security and very limited computer security. This program will not "lock"
out your hard drive when a boot is done from the floppy drive (which is
is much more secure, but risky). Instead, PASSBOOT will provide moderate
computer security, and uses a password encryption process.

FILES INCLUDED:

PASSBOOT.EXE (The executable program)
PASSBOOT.DOC (This documentation file)

PASSBOOT has been tested on a PC XT 8088, 286, and 386. It should work
with any monitor and with or without a graphics card. It has been tested
to work with DOS 3.xx but should work fine using DOS 2.xx or 4.xx.
If you have found any combination of computer system, graphics card,
DOS version, etc., that does not work with PASSBOOT, please let me know.

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To use PASSBOOT to restrict access to a computer at power up:

Copy the file: PASSBOOT.EXE to your root directory.
Next add the line PASSBOOT as the first line in your AUTOEXEC.BAT file.
Finally, select a password by going to your root directory (CD\) and
typing:

PASSBOOT

The program will respond:


The Password = Password Does Not Exist !!

CHANGE PASSWORD TO: _


Select a password, type it in, and press ENTER. The password can be
between 1 and 8 characters long. It can contain upper or lowercase
letters (alpha characters), numbers (numeric characters), and some
punctuation. The punctuation that is accepted includes the following:

SPACE . ; : ! ? * ' - / \

Passwords are case sensitive which means that if you use all lower
case letters, then uppercase letters will not work for your password.

The next screen will confirm your password selection and advise you
to WRITE YOUR PASSWORD DOWN - or you can press PRINT SCREEN to print
the screen as a record of your new password.

Once you have followed the above instructions, the program is installed.
From now on when you turn your computer on or do a reset (such as
CTRL-ALT-DEL), you will be prompted to enter your password.

You will be allowed only three tries to get the password right.
If you don't, you will get a response that ACCESS IS DENIED, and
your system will lock up. You must reboot the computer (i.e.:
ctrl-alt-del) to proceed.

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To use PASSBOOT to restrict access to individual programs:

Copy the file: PASSBOOT.EXE to the directory containing the program
that you wish to restrict access.
Next, create a batch file to load your program like the following
example:

ECHO OFF
CLS

PASSBOOT
PROGRAM <-- the name of your program


Finally, select a password by going to the directory containing the
PASSBOOT file and your program and type:

PASSBOOT

The program will respond:


The Password = Password Does Not Exist !!

CHANGE PASSWORD TO: _


Select a password, type it in, and press ENTER. The password can be
between 1 and 8 characters long. It can contain upper or lowercase
letters (alpha characters), numbers (numeric characters), and some
punctuation. The punctuation that is accepted includes the following:

SPACE . ; : ! ? * ' - / \

Passwords are case sensitive which means that if you use all lower
case letters, then uppercase letters will not work for your password.

The next screen will confirm your password selection and advise you
to WRITE YOUR PASSWORD DOWN - or you can press PRINT SCREEN to print
the screen as a record of your new password.

Once you have followed the above instructions, the program is installed.
From now on, execute your program by using the newly created batch file
instead of the normal way. Each time you execute the new batch file,
you will be prompted to enter the password.

You will be allowed only three tries to get the password right.
If you don't, you will get a response that ACCESS IS DENIED, and
your system will lock up. You must reboot the computer (i.e.:
ctrl-alt-del) to proceed.

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To change your password at a later time:

It is wise to periodically change your password. To do this,
go to the directory containing PASSBOOT.EXE. Then type:

PASSBOOT CHANGE

You will be prompted to enter your password. You must enter your
existing password before you can change it.

Again, you will only get three tries. If you do not enter the correct
password after the third try, the program will abort and give you the
message: Access Denied!

Once you have entered the correct password, you will get a prompt
similar to that described above for selecting your password the
first time. Select a new password, type it in, and press enter.
Be sure to WRITE THE NEW PASSWORD DOWN !!

After following these instructions, you will have successfully
changed your password.

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To get instant help:

To get a small help screen, type:

PASSBOOT ?
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Final Notes:

BE CAREFUL not to forget your password. Also, be careful not to
select a password containing characters other than those listed above.

If you do forget your password and get locked out of your system,
you can still boot from a floppy disk containing the DOS system.
Once you have booted from a floppy, go to the directory containing
the file PASSBOOT.EXE and type: DEL PS000
Now you can start over by typing PASSBOOT and choosing a new password.

Be sure to make a backup of the PASSBOOT program. I recommend you
store your backup on a floppy disk.

USE THIS PROGRAM AT YOUR OWN RISK !!
Although precautions have been taken to ensure safe operation of this
program and instructions have been provided for its use, the author
assumes no liability for the programs use or misuse.

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Please support the author by sending a minimal fee of $10.00 and any
comments about the program you have to the address listed above.

Your support is appreciated and will help to provide regular updates
and other programs of interest.

Thanks for using PASSBOOT !


Bob Whitson

6/8/90


 January 1, 2018  Add comments

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