This presentation explores a range of options for securing microservices, ranging from physical network security to token-based authentication with OAuth2. It shows how the combination of rapid development and production-ready features in the modern Spring stack are a perfect mixture for developing secure components in a system composed of microservices. We explore the new features in Spring OAuth2, guide you through the choice of which to use and when, and show how easy they are to enable quickly. Also available (with clickable links) at http://presos.dsyer.com/decks/microservice-security.html.