After trying to install an application on my iPhone 4, I just saw this popup for the first time:
Security Info Required
To help ensure the security of your Apple ID, you must confirm your password and answer your security questions.
[Cancel] [Security Info]
Why is this dialog popping up?
Does it happen randomly? Or is it because I connected to a new Wi-Fi hotspot, and the App Store has never seen this IP address before? Or could it be because someone tried logging in with my account several times and failed?