This document discusses using big data analytics to enhance security. It begins by defining big data analytics and describing security trends like the evolution from intrusion detection systems to security information and event management (SIEM) to next-generation SIEM using big data analytics. An example of an advanced persistent threat is provided. The document then discusses integrating security analytics with open source tools like SQRRL and Prelert. Finally, it covers how to apply these concepts by determining what security-related data can be collected and two options for implementing big data analytics in a security program.