Which service model influences the logical design by using additional measures in the application to enhance security?

The service model that influences the logical design by incorporating additional measures in the application to enhance security is Software as a Service (SaaS). In a SaaS model, applications are hosted in the cloud and are accessed via the internet. Because the service provider is responsible for the entire application stack, including security, they implement various security controls and measures at the application level itself. This can include authentication mechanisms, data encryption, user access controls, and logging practices that are designed to enhance the overall security of the application for its users.

Since the provider manages security as part of their service offering, this allows for a robust approach to security that can be integrated into the application’s design and functionality. For users, this means they benefit from security updates and improvements without needing to manage the underlying infrastructure or the complexities of implementing security measures themselves.

This focus on enhancing application security directly correlates with the strengths of SaaS, distinguishing it from other service models such as Platform as a Service (PaaS) or Hybrid and Public Clouds, where security measures may not be as tightly integrated with the actual application logic but instead may focus on securing the infrastructure or platforms provided.