What is Session Hijacking? In computer science, session hijacking, sometimes also known as cookie hijacking is the exploitation of a valid computer session—sometimes also called a session key—to gain unauthorized access to information or services in a computer system. FireSheep Tutorial fo r (http Session Hijacking) Firesheep a Firefox addon has recently become very popular for easily carrying out a HTTP session hijacking attack. Http session hijacking attack can't be considered as a very sophisticated attack but needs some technical knowlegde to be performed . But Firesheep makes the attack a child's play. Firesheep was developed by Eric butler for Firefox, it was released at Toorcon 12 to demonstrate how serious cookie stealing can be. Now lets understand how Firesheep actually works. When you provide your username and password in login forms of different website and submit it, the browser first encrypts the password and then sends it over the network. The corr