How Cloudflare works…maybe

Using Cloudflare myself for my blog and my overall interest in DDoS protection draw me to this weeks paper. It discusses a design of an overlay network for DDoS protection. Quite interesting to learn about the considerations coming into play. Sure Cloudflare, Akamai, Google etc. evolved since then, but this paper gives quite nice fundamentals on how to design such a protection. Especially the computation powered puzzles is a nice concept (was programming one on the weekend actually)….most like Bitcoins proof of work ­čśë