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

The correct answer focuses on Software as a Service (SaaS) because this service model typically involves delivering applications over the internet, allowing users to access software without needing to manage the underlying infrastructure. With SaaS, organizations often have specific configurations and security measures that can be integrated directly into the application.

This model empowers developers and security teams to implement enhanced security protocols, such as user authentication, data encryption, and access controls, directly within the application layer to safeguard sensitive data. By managing these additional security measures within the application, SaaS platforms can better protect against threats and vulnerabilities that could exploit the software.

Moreover, the emphasis on application-level security in SaaS makes it distinct from other models like Platform as a Service (PaaS), which primarily focuses on providing development and deployment platforms rather than fully managed software solutions. In contrast, public and hybrid clouds may involve shared controls and infrastructure, which can limit the level of influence over security design aspects specific to applications. Thus, SaaS stands out as the model that directly integrates security measures into the application logic for enhanced protection.