Understanding the AWS Service Authorization Reference
🔒This AWS Security Blog post explains how to use the AWS Service Authorization Reference to determine what IAM policies can and cannot control. It introduces the PARC (Principal, Action, Resource, Condition) authorization context and shows how condition keys drive policy decisions. Through practical examples — S3 server-side encryption, EC2 instance-type restrictions, and DynamoDB leading keys — the article explains when to rely on policies and when to layer detective or policy-as-code controls.
