Security Using Captcha as a Graphical Password

Many security primitives are totally based on hard mathematical problems. With the help of hard AI problems, security is emerging as an exciting new paradigm. In this paper, we present a new security technique that is basically based on hard AI problems, namely graphical password systems and which is built on top of Captcha technology, which we defined as Captcha as graphical passwords (CaRP). It is actually both a Captcha and a graphical password scheme. We design CaRP technique to provide a security for cloud such access and data on cloud and can be useful in many other cases. CaRP provide a number of security problems, such as online guessing attacks, shoulder-surfing&relay attacks. So that we provide three levels for the security purpose such as level1, level2 and level3. And also data on the cloud is making more secure by using encryption algorithms so main advantage is it provide robust security.

Level 1: It consist of simple click on image, image is made up of alphanumeric password.

Level 2: It consists of the click on image from the image grid.

Level 3: It consists of the image and numbers on the image grid.

CaRP offers reasonable security, usability&it's appears to fit well with some applications for improving better online security. In this we mainly focus on making cloud more secure using this new paradigm CaRP.