I created this small, password protected OS. It is called SecOS and cannot be terminated. Also, the password of the users are encrypted so that you cannot read them directly. However, you can edit them. They are (as far as I know) only decryptable with themselves as password.
Added commands:
- mkusr (Create a new user in the /users directory)
- passwd (Change the password of the user you log in)
- secure (A small API which allows for fast password encryption and check)
- /users (The directory every user and password is stored)
Link: SaRwxwcn
Note: This file can unpack itself, simply type in "<Filename> <Filename>"
I hope you have fun with this.