Explore how big data analytics can enhance web application security in this 20-minute Black Hat USA 2013 conference talk. Discover the fundamental problems solvable through big data and learn about security mechanisms that fall outside its scope. Gain insights into a security team's daily use of big data to address complex issues and improve user safety. Delve into topics such as MapReduce, Cascading, Etsy's workflow, reactive and proactive security measures, and instant response techniques. Presented by Mike Arpaia and Kyle Barry, this talk bridges the gap between data science and web application security, offering practical examples and strategies for leveraging big data to strengthen application defenses.