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1991-12-16
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3KB
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73 lines
If you want to control access to your PC, here's a program
that may be just what you're looking for. It's not intended
for material that demands maximum security, but it should
keep anyone who's not technically sophisticated from
tampering with your computer.
To create the program, SECRET.COM, copy SECRET.SCR to an
ASCII text file on your hard disk. [You can do this
automatically by pressing the Alt-F key.] Create an
8-character password in place of the word `Password'.
Finally, run the script through DEBUG by typing
DEBUG < SECRET.SCR
at the DOS prompt. The program SECRET.COM will appear in the
current directory.
To restrict access to your PC, invoke the new SECRET.COM at
the beginning of your AUTOEXEC.BAT file. Anyone trying to
boot your computer will have to know your password to get
through.
Lee Carpenter
Rabun Gap, Georgia
Editor's note: Lee Carpenter, the 17-year-old author of this
program, has created a very useful utility for PC World
readers. I made a few changes to Carpenter's code so the
password is easier to change. In addition, the program will
now bypass DOS calls for character I/O, preventing someone
from getting around the program by pressing <Ctrl>-<Break>.
Still, as the author points out, the protection isn't
foolproof. Depending on your system, the program can be
circumvented by booting from a floppy, or by hitting
<Ctrl>-C between the time AUTOEXEC.BAT starts running and
the time this program is invoked. However, SECRET.COM will
shield your PC from users who aren't knowledgeable enough to
try these tactics.
Finally, the password must be 8 characters long--no more, no
less. Also, it's case sensitive; if you use capital letters
in it, you'll have to do the same when you boot.
Debug Script to Create SECRET.COM
(Warning: Change password before using!)
---- BEGIN LISTING ----
N secret.com
E100 BE 48 01 E8 30 00 C6 06 47 01 00 BF 7C 01 B9 08
E110 00 32 E4 CD 16 3A 05 74 04 FE 06 47 01 BE 7A 01
E120 E8 13 00 47 E2 EB BE 6A 01 80 3E 47 01 00 75 01
E130 C3 E8 02 00 EB CA B4 0F CD 10 FC AC 3C 24 74 06
E140 B4 0E CD 10 EB F4 C3 00 0D 0A 45 6E 74 65 72 20
E150 38 2D 63 68 61 72 61 63 74 65 72 20 41 63 63 65
E160 73 73 20 43 6F 64 65 3A 20 24 0D 0A 41 63 63 65
E170 73 73 20 64 65 6E 69 65 64 24 2A 24
A17C
DB 'Password'
RCX
84
W
Q
---- END LISTING ----
Title: Keeping Your Secrets Secret
Category: MSC
Issue date: Nov 1991
Editor: Brett Glass
Supplementary files: NONE