EVALUATING THE STRENGTH OF COGNITION BASED CAPTCHA BY THE APPLICATION OF CAPTCHA BREAKING ALGORITHM

Abstract

To secure the web services from automated spam bots nowadays CAPTCHA has become a standard security mechanism. It is a class of human interaction proof (HIP) which ensures that only human being is interacting with the system and not a bot at all. This ever increasing demand of secured web service motivates us to do more and more research in this area which leads to the generation of secured and robust CAPTCHA. Preceding in the same direction the present paper introduces a more reliable and innovative CAPTCHA based on cognitive ability of human. This CAPTCHA utilizes some of the designs created using alphabets and numbers to be used as CAPTCHA code. So, the major strength of this CAPTCHA code depends upon the design chosen. Further, to evaluate the strength of this CAPTCHA, the visual CAPTCHA breaking algorithm is applied to it to justify the robustness of present CAPTCHA generation technique.