Graphical passwords provide a promising alternative to traditional alphanumeric passwords. They are attractive since people usually remember pictures better than words. It is an authentication system that works by having the user select from images, in a specific order, presented in a graphical user interface. For this reason, the graphical-password approach is sometimes called graphical user authentication (GUA). Graphical passwords also offer better security than text-based passwords because many people, in an attempt to memorize text-based passwords, the system combines graphical and text-based passwords trying to achieve the best of both worlds. It also provides multi-factor authentication in a friendly intuitive system.