Which level of CSA STAR involves continuous monitoring of security properties?

The correct choice references Level Three of the CSA STAR program, which is designed for continuous monitoring of security properties. This level emphasizes an ongoing process of evaluating the organization's security practices and controls, allowing for real-time adjustments and improvements based on emerging threats and vulnerabilities.

Continuous monitoring is crucial as it ensures that security measures remain effective in response to the dynamic nature of the cloud computing environment. Organizations that achieve this level are not only reviewing their security posture through audits and assessments but are also implementing processes that enable them to actively detect and respond to security incidents as they occur.

In contrast, the other levels do not focus on continuous monitoring. Level One involves self-assessment and reporting, primarily based on the cloud provider's self-disclosed information. Level Two adds a third-party assessment but still revolves around periodic evaluations rather than real-time monitoring. Level Four, often associated with the highest standard of security, includes advanced security practices but does not specify continuous monitoring as a primary focus. Therefore, Level Three is distinct in its commitment to maintaining an active, ongoing oversight of security measures.