This is a presentation called HTTP Parameter Pollution that focuses on manipulation and injection of HTTP GET/POST parameters.
You can download it from the following link: https://packetstormsecurity.com/files/download/77641/AppsecEU09_CarettoniDiPaola_v0.8.pdf
Source: https://packetstormsecurity.com/files/77641/HTTP-Parameter-Pollution.html