AppDefender allows you to intercept unauthorized access to your applications using USB Flash Drive or a password. When somebody tries to launch protected application, AppDefender asks a password. You can protect your mail client, system preferences, Keychain Access, Terminal and any other application from your Mac. Also, AppDefender informs you who and when tries to launch protected applications and sends you mail notification with photo. Simply remember your master password or use a USB Flash Drive as your personal key and you'll be more secure.