Authentication Scheme for Shoulder surfing using Graphical and Pair Based scheme

In graphical scheme, at the time of registration user set his password and select a color out of 8 colors given by system. At the time of login a wheel is appear on the screen divided on 8 sectors. User select that sector which contain his particular color. If this sector not contain his password character, user rotate the wheel on clockwise or anti-clockwise direction to recognize his original password and click on the confirm button. Process repeated until user recognize all his original password. There is a combination of alphanumeric and special characters in each sector. User should select from it. Three wrong attempt will disable the account and email is sent to user.In pair based scheme user select set password of minimum length 8 and it both even and odd. At login, a 6x6 grid is appear, user type the first letter of that row and column which contain the password character and click on the character which is the intersection point of that row and column. Again select the new row and column and intersection point. Process repeated until all password character will be selected.

http://ijarcsms.com/docs/paper/volume2/issue10/V2I10-0058.pdf