Abstract

Passwords are used to restrict access to data. A user can gain access to a password protected file only by entering the correct password. Generally users prefer to use short passwords or those which are easy to remember. Such passwords definitely save time while logging in but are prone to various kinds of attacks. If an attacker is able to break the password then he will gain unauthorised access to someone’s private data. To solve this problem researchers have come up with various techniques to strengthen the authentication system. One of those methods is based on graphical passwords. Graphical password techniques have been introduced as an alternative to the conventional textual password techniques. The password techniques presented in this paper will see a transition from textual passwords to graphical passwords. Simple textual characters will be treated as graphical forms. The users need to understand the graphical password system and the password entry mechanism.