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Wednesday, 28 February 2018

Graphical Password To Avoid Shoulder Surfing

Graphical Password To Avoid Shoulder Surfing

Since conventional password schemes are vulnerable to shoulder surfing, many shoulder surfing resistant graphical password schemes have been proposed. However, as most users are more familiar with textual passwords than pure graphical passwords, text-based graphical password schemes have been proposed. Unfortunately, none of existing text-based shoulder surfing resistant graphical password schemes is both secure and efficient enough. In this paper, we propose an improved text-based shoulder surfing resistant graphical password scheme by using colours.
In the proposed scheme, the user can easily and efficiently login system. Next, we analyze the security and usability of the proposed scheme, and show the resistance of the proposed scheme to shoulder surfing and accidental login. The shoulder surfing attack in an attack that can be performed by the adversary to obtain the user’s password by watching over the user’s shoulder as he enters his password. As conventional password schemes are vulnerable to shoulder surfing, Sobrado and Birget proposed three shoulder surfing resistant graphical password schemes. Since then, many graphical password schemes with different degrees of resistance to shoulder surfing have been proposed and each has its pros and cons.

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