Secure boundaries: auth, input validation, secrets management, and dependency hygiene for JVM services.
Security in microservices is mostly about boundaries: every service is an entry point, every dependency is an attack surface, and every “internal-only” assumption eventually becomes false.
This section covers pragmatic, JVM-real security hygiene: authentication/authorization at the edge, careful input validation, safe handling of secrets, dependency scanning, and secure defaults for HTTP and inter-service communication.
The goal is not to turn you into a security specialist—it’s to make sure your service designs are not accidentally unsafe by construction.