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Business over the internet has increased rapidly. The area of internet marketing, online banking, online reservation and various online services are gaining popularity among users and also the service providers. The advancement in internet technologies is providing rich interface and user-friendly services. At the same time it attracts the attackers to try their hands to exploit the vulnerabilities that present in the application. The Web Parameter Tampering attack is such a vulnerability which can be easily exploited by using some tools like Tamper Data, Webscarab, Paros Proxy and Burp Suite etc. Web parameter tampering attack is based on the modification of parameters exchanged between client and server in order to manipulate application data, such as, order details like price, quantity of products, user credentials and permissions etc., i.e., sent to the application through a POST request. Usually, this information is …