Password help

I'm trying to make a password program that can be stored on a floppy disk copped onto the computer and the password can only be edited on the floppy disk. I know how make put it on a floppy disk and I know how to copy it onto the computer and i know i can edit the password when in the program code, but what i don't know is there a way to edit a programs code when in another program. What I really want to do is make it so I can't change the computers password unless I run a program on the floppy disk.

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And also due to the way someone coded the bios you can not stop hack attempts.

Someone can easily just restart your computer and place a disk drive next to your computer to bypass any security you have and do what they please to your files.

Other then that, You could try a io.open() and close it when it detects it.
io.open would prevent editing of the file.
But still. As I said. Its easy to hack. Easier then rl infact.

Because Windows doesnt code in a backdoor for every wannabe hacker.

Ok thanks but iv solved the problem using rednet instead :P/>/>