SSL, mTLS and certificate handling often become a source of frustration for Java developers, especially when different protocols and cryptography providers are involved.

This talk demonstrates how to implement advanced security scenarios in Spring Boot with multiple SSLContexts running in parallel. It shows how to integrate X.509 certificates for REST and SOAP services, how to set up mutual TLS (mTLS), and how to use alternative providers such as BouncyCastle, including Brainpool curves as used in infrastructures like the German healthcare TI network.
The session is practical and code-oriented. It focuses on real implementations, typical pitfalls, debugging techniques and proven patterns for creating secure and production-ready Spring Boot bapplications.