I am trying to find a software to lock up directories in a CD for security or authoring purposes.

Example: password-locked directory.

Say, on the CD is one root directory inside which a number of sub-directories.
The computer can read the CD and can open up the root directory, but cannot open the root directories without knowing and keying in the correct password.

The purpose is that even though someone got my CD, and got his computer to read it, he cannot go further to read anything in it.

Any ideas ?

Appreciate suggestions and/or software to use.