This session will cover essential AWS Cloud Security principles with a focus on building resilient, secure architectures. We begin with the Shared Responsibility Model and security’s role in the Well-Architected Framework, emphasizing that availability does not equal security. Next, we dive into IAM best practices, including least privilege, role chaining, and policy validation. We explore network security design using VPC segmentation, PrivateLink, and Zero Trust principles. The session also highlights threat detection and monitoring with services like GuardDuty, CloudTrail, Macie, and Security Hub, and how to automate response with EventBridge and Lambda. In data protection, we address encryption at rest and in transit using KMS, S3 bucket security, and data masking techniques. Finally, we close with DevSecOps and automation strategies, including security in CI/CD, Infrastructure as Code (IaC), and policy-as-code with tools like OPA.