How do I install F-Secure KEY on my Android for the first time? On your device, go to the Google Play Store and search for F-Secure KEY. Tap Install, then Accept to allow KEY access. Once installed, tap Open. Tap Create Master Password and think up a strong master password. Type the password in Master Password, and again in Repeat Master Password. Note: If you select the box Remember my Master Password on this device, KEY does not ask you for your master password any longer, unless you lock the app from the menu. Tap Continue. Related information What is an F-Secure KEY Master Password? What is an F-Secure KEY Master Password Recovery Code?