For the Nvidia project formerly known as Project Shield, see Shield Portable.
Project Shield is a free anti-DDoS service by Google that is offered to websites that have "media, elections, and human rights related content." The main goal of the project is to serve "small, under-resourced news sites that are vulnerable to the web’s growing epidemic of DDOS attacks" according to team lead George Conard. It is similar to services offered by companies like CloudFlare. Google initially announced Project Shield at their Ideas Conference on October 21, 2013. The service was initially only offered to trusted testers, but on February 25, 2016, Google opened up the service to any qualifying website. The service works by having the website use Google's name servers, and traffic is routed through a Google-owned reverse-proxy, which identifies and filters malicious traffic.