1.3. AWS Shared Responsibility Model (Developer Context)

At its core, the AWS Shared Responsibility Model is a fundamental principle clarifying security obligations in the cloud. Its core purpose is to define precisely who is accountable for what aspects of security, ensuring no gaps in protection. For developers, understanding this model is crucial to ensuring the security of their applications running on AWS.

AWS is responsible for "security of the cloud", encompassing the underlying infrastructure. Conversely, the customer (including developers) is responsible for "security in the cloud", covering everything configured and managed within their AWS environment related to their application.

Understanding this distinction is paramount for the AWS DVA-C02 exam. It directly impacts how you develop, deploy, and debug your applications securely on AWS. Misinterpreting these roles can lead to significant security vulnerabilities in your application.

Scenario: You're developing a new web application on AWS and need to ensure its security. You're wondering whether you're responsible for the physical security of the servers or the security of your application's code.

Reflection Question: How does understanding the AWS Shared Responsibility Model clarify your role as a developer in securing your application (e.g., code security, IAM permissions), versus AWS's responsibility for the underlying infrastructure?