Keeping sites and users safe offers a variety of challenges, from a number of unique perspectives. This talk will dig deep into the challenges and concepts involved at securing a large number of sites, unique considerations in scaling, and tools and concepts that can give unique benefits only available when working at scale. Whether you’re interested in finding unique ways to keep your single site safe, preparing a product or system to scale, learning how to develop unique insights through big data, or just eager to see some examples for inspiration, this talk should be able to pique your interest.