JIT_V4_N1_RevP1 Syeatha Merlin Thampy Alphonsa Johny Journal on Information Technology 2277-5250 4 1 33 38 Graphical Password, Authentication, Alphanumeric Passwords, Brute Force, Dictionary Attacks, Shoulder Surfing Authentication is the mechanism in which the system check the identity of the user who access it. Traditional alphanumeric passwords are used. Due to the limitation of human memory, most users try to choose short-term or simple passwords which are easy to remember. Surveys show that frequent passwords are personal names of family members, birth date, or common words. In most cases, these passwords are easy to guess and vulnerable to dictionary attack.In an attempt to create more memorable passwords, graphical password systems have been devised. In these systems, authentication is based on clicking on images rather than typing alphanumeric strings. This paper presents a survey on some graphical password authentication systems. December 2014 – February 2015 Copyright © 2015 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=3282