04-09-2014, 10:37 AM
Adding Persuasive features in Graphical Password
to increase the capacity of KBAM
Adding Persuasive.doc (Size: 36.5 KB / Downloads: 13)
ABSTRACT
Most of the existing authentication system has certain drawbacks for that reason graphical passwords are most preferable authentication system where users click on images to authenticate themselves. An important usability goal of an authentication system is to support users for selecting the better password. User creates memorable password which is easy to guess by an attacker and strong system assigned passwords are difficult to memorize. So researchers of modern days gone through different alternative methods and conclude that graphical passwords are most preferable authentication system. The proposed system combines the existing cued click point technique with the persuasive feature to influence user choice, encouraging user to select more random click point which is
difficult to guess.
EXISTING SYSTEM
The problem with text based password is that user creates memorable password which can be break easily and also the text password has limited length password which means that password space is small. Biometric based authentication techniques are somewhat expensive, slow and unreliable and thus not preferred by many. Token based authentication system has high security and usability and accessibility then the others. Also the system uses the knowledge based techniques to enhance the security of token based system. But the problem with token based
system is that if token get lost, the security get also lost . Therefore the Knowledge based authentication techniques are most preferable technique to improve the real high security. Graphical Password is one of the knowledge based technique and it is categorized into Recognition based and Recall based. In Recognition based techniques user has to recognize or reproduce the things during the login where as in case of recall based technique user has to recall the things during the login in such a way that whatever they selected during the password creation they have to recall it in the same manner.
PROPOSED SYSTEM
The proposed system is based on click based graphical password system that not only guides and helps the user for password selection but also encourages the user to select more random distributed password. The proposed system is based on Persuasive Technology which motivates and influence people to behave in a desired manner . The proposed system combines the Persuasive features with the cued clickpoint to make authentication system more secure. Basically during password creation the part of an image which is less guessable is highlighted and user has to select the click-point within the highlighted portion and if the user is unable to select the click-point then he can move towards the next highlighted portion by pressing the shuffle button. The highlighted part of an image basically guides users to select more random passwords that are less likely to include hotspots. Therefore this works encouraging users to select more random, and difficult passwords to guess. During Login, images are displayed normally and user has to select the clickpoint as chosen at the time of password creation but this time highlighted portion is not present as it only provides the system suggestion. An important usability goal of proposed system is to support users in selecting password of higher security with larger password space. The proposed system removes the pattern formation attack and Hotspot attack (it is an area of an image where most of the user is selecting it as the click-point).Also it removes the shoulder surfing attack.
CONCLUSION
A major advantage of proposed scheme is that it provides larger password space then the alphanumeric passwords. For Graphical passwords there is a rising interest is that they are better than the Text based passwords, while the important argument for graphical passwords are that people are better at memorizing graphical passwords than text-based passwords. Also it removes the pattern formation and hotspot attack since it provides the system suggestion. Also the proposed system
removes the shoulder surfing attack.