Secrets is the new feature in Stadium. Any data marked as a secret in Stadium remains your data and is not stored in the application file (or better known as the sapz) but in a secured vault, specific to that logged-in windows user and computer. That means if you enter a secret value on your home laptop and then later open the same sapz on your work laptop that secret will be blank. Or, should someone else log onto your computer and open your sapz, all secrets will be blank. Your secret remains exactly that - a secret.