What is the primary purpose of the STRIDE threat model?

The primary purpose of the STRIDE threat model is to assist in identifying and prioritizing security threats. STRIDE is an acronym that represents six different types of security threats: Spoofing, Tampering, Repudiation, Information Disclosure, Denial of Service, and Elevation of Privilege. By using this model, security professionals can systematically analyze potential vulnerabilities in a system or application and assess how these threats could be realized in practice.

This method allows teams to focus their security efforts on the most critical threats that could potentially impact the integrity, confidentiality, and availability of their systems. The structured approach provided by STRIDE enables organizations to prioritize security measures based on the likelihood and impact of various threats, leading to a more informed and effective security strategy.

In contrast, the other options presented do not align with the core functionality of the STRIDE model. Evaluating user interface design, developing marketing strategies, and creating software testing procedures address different areas of focus that are not related to threat identification and prioritization.