On the Internet, cookie tampering is a process in which an attacker obtains unauthorized information of a user by modifying a cookie (personal information in a website user's computer), and then steals his identity. An attacker may use this information to open a new account or gain access to a user's existing account.

A Cookie is a small piece of information stored on a computer hard disk. It allows the websites you visit to identify you, speed up your transactions, monitor your behavior and display personalized information for you. However, cookies may also be accessed by unauthorized people. Without security measures, attackers can check the cookie and get its purpose, and edit it to help them get user information from the website that sent the cookie. In order to prevent cookie tampering, websites should implement some protection measures (such as encryption) before sending cookies to users' computers. The active application security of Ingley Ann Neorks Company is such a platform to prevent cookie tampering. Sensitive information will be encrypted when cookie pass through the platform. Digital signature is created to verify the content of future communication between sender and receiver. If the content is tampered with, the digital signature will be different from the previous one, and the server will refuse to log in.