AWS API Gateway Security for Serverless Applications

Securing serverless entry points is critical for protecting backend resources and sensitive user data. This written course guides you through the core concepts of securing API Gateway endpoints, ensuring you can confidently control access and mitigate threats. You will start with fundamental security terminology, identity concepts, and basic cloud networking before moving on to practical implementation patterns. By completing this course, you will understand how to design robust authentication and authorization flows for REST, HTTP, and WebSocket APIs in serverless architectures. What you will learn: - Understand foundational cloud security concepts and the shared responsibility model - Configure IAM policies and resource-level permissions to restrict access to your endpoints - Implement Cognito user pools and identity pools for secure user management and authentication - Build custom Lambda authorizers to handle complex, token-based authorization logic - Secure real-time WebSocket APIs and manage connection-state authorization - Apply CORS policies, TLS configurations, and zero-trust security principles to prevent unauthorized cross-origin requests - Monitor API traffic and detect anomalies using CloudWatch logging and modern security observability practices This course begins with essential architectural definitions and security models, then progresses through step-by-step configuration scenarios with clear text-based explanations and configuration snippets. It is designed for software developers, system administrators, and cloud beginners who want to build secure AWS integrations without needing deep prior security expertise. Start reading today to build secure and resilient serverless APIs.