Now-a-days internet is used for multiple activities by a huge number of people. These activities include communication, e-commerce, education, and entertainment. For many sites users' needs to register to enroll website. However this websites are vulnerable. Hence hackers hack this software available for automatic entry. This software make false entry which occupies the resource of website hence reduces space, performance and efficiency of servers. There is one solution to this problem, use of a software that differentiates between human being and computer robot. The name of that software is completely automated public turing test.