Implement only strong authentication mechanisms and data encryption, as these are sufficient for GDPR compliance.

Specify security requirements including secure coding practices, input validation, regular security testing, and ensure the application is designed with privacy by design principles to meet GDPR requirements.

Focus solely on securing the network and endpoints used to access the web application, as network security is the most critical aspect of protecting sensitive data.

Rely entirely on Azure's built-in security measures without implementing any additional security controls, assuming Azure's compliance certifications cover all necessary GDPR requirements.