This article explores stream processing using KSQL with Apache Kafka®, demonstrating its use in various industries like financial services and IoT. It emphasizes the importance of securing KSQL and the entire Confluent Platform through encryption, authentication, and authorization. The text also provides a sample configuration for a KSQL server and discusses how security is integrated into every component of the Confluent Platform. Additionally, it mentions a tutorial on configuring security in the Confluent Platform and resources to learn more about the platform.