Password Protection Flash 5

I am a (beginning) webdesigner and for one of my latest Flashprojects I had to make a password protected section. So I started thinking. Everybody can crack a Javascript password protection, I don't know enough to do it in Java and those applets aren't fully crackproof, next possibility PHP or ASP forget it I had to use Geocities and had no PHP or ASP support. Just on the moment I tought I wouldn't be able to solve this problem Flash came in my mind. Flash has several advantages in this matter. Nobody can view my Actionscriptcode, it's extremely easy and almost everybody has Flash.