Here is a program (in VB of course)
http://www.network54.com/Realm/NoSee/

You can easily encrypt (very securely) your private info.

The techniques uses are spelled out and portions of the VB Source are provided for your info or use.

While files are encrypted, not even "File Recover" or similar utilities can recover the original file. This way, if someone steals your computer, they can't get your private info.

Mac