Use Keynote as a trade show presentation tool in a secured (kiosk) mode?

Hello,

I want to use an iPad during a fair / trade show, where it shall run a Keynote (or formerly PowerPoint) presentation. In order to restrict the users to manipulate the presentation, I want to run it in a "secure" mode, where the user cannot access via double-clicking or gestures the edit level of Keynote.

If an admin needs to reach the edit level again, this should be achieved via a password or reboot.

I know, that the Keynote app for OS X is able to secure access as well as quitiing the app via a password protection. But unfortunately (…or should I better say: idiotically ?) this very behaviour is ignored / deleted from the Keynote file when importing it to the iPad version of Keynote!

Is there a way to use Keynote as a trade show presentation tool in a secured mode?

ANY help is VERY welcome!