Which of the following is a valid use case for REST APIs concerning identity attributes?

A valid use case for REST APIs concerning identity attributes is aggregating identity attributes from external systems. REST APIs facilitate the integration and communication between different software applications by allowing them to exchange data over the web. In the context of identity management, REST APIs can be employed to pull in diverse identity attributes from various external sources, such as databases or identity providers. This capability is crucial for maintaining up-to-date and comprehensive identity records within a central system.

For instance, if an organization uses multiple applications that handle user data independently, REST APIs can help gather and synchronize this information, ensuring that the central identity system reflects all relevant attributes correctly and in real-time. This streamlined aggregation helps in delivering a more robust identity security posture by providing a holistic view of users and their associated attributes.

The other options do not represent suitable use cases for REST APIs when it comes to identity attributes. While amending system architecture might involve APIs in a broader context, it does not specifically pertain to handling identity attributes. Disabling third-party access and enhancing internal authentication also deal with security management processes but do not directly relate to the aggregation of identity attributes.