The study of video conference transmission security as an example on Windows Live

Today video conference applications are very common in internet. On the other side, network firewalls have become basic network security equipments. Not only enterprises will set up firewall system, most of SOHOs and individual users also set up a firewall as a standard device. In order to allow Video Conference network environment in normal operation in a firewall environment, IETF and the Video Conference industry propose a lot of solution. In this article, we choice Windows Live 2009 software video conference to measure and compare the difference of video image between sender and receiver. Though it does not support ITU-T standard protocol. But Windows Live is still very popular in Instant messaging (IM) field. We forward to provide a common video conference could normally work under a DDoS attack environment.