Q. How can I check if my son has hacked his iPod touch? I'm worried that he's hiding porn behind the calculator. I've searched the Internet, but couldn't find any help.

A. I assume you want to know if your son installed HidePod. This program is designed to hide videos, programs and photographs.

HidePod was developed for the iPhone and the iPod touch. In order for HidePod to run, the touch or iPhone must be "jailbroken."

Basically, jailbreaking a touch or iPhone lets you add unauthorized software. It is free and relatively easy to jailbreak a touch or iPhone.

HidePod masquerades as a calculator. The calculator appears by default on the touch and iPhone.

After you open HidePod, you enter a code using the calculator controls. Then, the program opens. It lets you browse a secret collection of programs and media files.

Secret collection

HidePod is designed to be covert. So the program isn't going to advertise its presence. But you can try to discover it.

You can try to guess HidePod's pass code. It is a string of numbers enclosed in decimal points. Open the calculator, enter ".8008." and see if HidePod opens. This is the default password.