A Comparative Study of Various CAPTCHA Methods for Securing Web Pages

摘要

CAPTCHA is broadly used for to make system secure. Its aim is to avoid robotic form submission or prove customer individuality. A pattern matching algorithm is useful to user for imagery to see gesture and find similar matches. This technique is very hard to gain unauthorized access of data since crafty bit is to recognize gestures in the images. This technique is not feasible present day. This technique performs actions on the behavior of user gestures which make it distinctive and secure. A Human Computer Interaction between the computer and individual easily understand person language and raise the users are responsive interface. The gesture is the non-verbal type of message communication which enables the Human Computer Interaction interface. The gesture is much more skilled to reduce the utilization of most conspicuous an electronic device which the additional strategy are to deal with computers. Scientists have just considered that Turing examination with the cartoon CAPTCHA is fun and amusing method. In this paper, authors have discussed various different methods of CAPTCHA to secure web page and user's individuality.