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Highly Secured Q/A CAPTCHA Based on Clickpoints

R Sivapriya, R.M. Thangam, R.S Nayana, G. Sanker


Providing security for user accounts on website has become one of the major issues in the current networking era. Captcha is the existing technology which produces a puzzle like typing letters which are shown in a distorted fashion, which is easy for humans but difficult for bots but already been broken. The proposed system is called Q/A Captcha, wherein, a dynamic question which is general, has a unique answer and is easily identifiable by human users will be generated, and the expected response will be a sequence of clicked points in the given image. It consist of 3 layers: first layer is a background image, second layer is a set of words superimposed on first and the third layer is the question or the answer letters. Question will be printed above the 2- layered image as a line, in a distorted form, readable by the user. The answer will be a set of letters with slightly bigger size which will be drawn above the 2-layered image, scattered anywhere in it and the user have to click on those letters in the order. The new system is highly resistant to segmentation attacks and background-foreground extraction.

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