Graphical password authentication is an alternate and yet evolving type of authentication in this current era, it is either recall or recognition based. User will either reproduce the image or recognize the images which was used or produced during the registration phase. Passwords guards the resources and information by allowing only designated person to access. Graphical password is new, trending and seems to be very promising method of authentication.it exists as an alternative to the text password. Alphanumeric usernames and passwords are the most common technique put in use. This technique showed to have some of it's advantages over simple text password but also with some cons too. When it comes to alphanumeric passwords, user either will try to keep a simple strength password which stands a chance to get cracked, but it gets inconvenient for the users to remember the strong strength passwords. With the graphical password, user will keep images or points-of-interest of images as password. Most advanced and secure type of authentication for these days is bio-metric, but it is too expensive to be used by all. Therefore, graphical password which is less expensive, secure and easy to be used by all can be considered as a perfect alternative method of authentication.