Explore key patterns and technologies for securing service-to-service call chains in this 43-minute conference talk from Spring I/O 2023 in Barcelona. Dive into critical security challenges and solutions, covering API Gateways, Service Mesh, SPIFFE, mTLS, JWT, and OpenID Connect using Spring-based demo applications. Gain a comprehensive understanding of various security patterns, their technical and security tradeoffs, and learn how to choose the best fit for specific requirements. Access a GitHub repository containing implementations of all discussed patterns to apply the knowledge directly to your projects.