How to build a secure AWS infrastructure

This blog summarizes the AWS Well-Architected Framework’s Security Pillar, emphasizing the shared responsibility model and best practices to secure AWS environments: organizing workloads via separate accounts with MFA, implementing least-privilege IAM, leveraging CloudTrail, Config, GuardDuty, and Security Hub for monitoring and alerting, hardening networks and compute (patching, security groups, DDoS protections via CloudFront/WAF/Shield), protecting data at rest and in transit (S3/EBS encryption, TLS via ACM), and preparing robust incident response plans and playbooks. It provides guidance for building a secure AWS architecture rather than reporting on a specific cyber incident.