Every new technology has some disadvantages as well as advantages associated with it and the same goes with web. In today’s world, web threats are increasing day by day because of the increasing cyber crimes. With such a huge threat passive defense method cannot be helpful and effective because there are multiple host pages who are injecting attacks with the help of dynamic links content. The users are guided to such poison results by search engine unknowingly.

Nowadays the websites which are considered to be trusted are the main center of web threats as the people are downloading without looking. The cases of web applications created vulnerability is increasing day by day and it has become the matter of concern for most of the people as there are no web applications in the market who can claim that they are free from any danger which can be in terms of security and privacy.