Why do I need to re-enter my BlackBerry ID password?

After a certain amount of time, if you aren't actively using the app or service that supports BlackBerry ID, you might be prompted to re-enter your password. For example, you might be prompted to re-enter your BlackBerry ID password before you download apps from the BlackBerry World storefront.

You might also be required to re-enter your BlackBerry ID if you change any of your BlackBerry ID information, delete all of the data on your BlackBerry device, or update the software on your device.