If you have applications on your computer that you would like to keep only for yourself, or to restrict the access to those applications, the perfect solution for you is the Lock Applications function.
east-tec InvisibleSecrets will encrypt the application. When you want to run a locked application you need to supply the password. east-tec InvisibleSecrets will decrypt the application and will allow you to run it. After the application is closed, east-tec InvisibleSecrets re-encrypts it in the background. To quickly open the list of locked applications you can define a hot-key, or use the tray menu.