Cedar
Cedar is an open-source policy language developed by Amazon Web Services (AWS) for defining and evaluating authorization policies in cloud applications. It is designed to be expressive, scalable, and secure, allowing developers to specify fine-grained access controls using a simple, declarative syntax. Cedar policies are evaluated by the Cedar Policy Engine, which integrates with services like AWS Verified Permissions to enforce authorization decisions.
Developers should learn Cedar when building or managing applications on AWS that require robust, scalable authorization systems, such as multi-tenant SaaS platforms, enterprise applications, or cloud services with complex access rules. It is particularly useful for scenarios where fine-grained permissions, auditability, and separation of policy from application logic are critical, as it reduces security risks and simplifies policy management.