Security diagnostics is a research field and methodological approach focused on the systematic examination and analysis of systems, networks, applications, or services to assess their security posture, identify vulnerabilities, detect and differentiate potential or actual security incidents from false positives, and understand the characteristics and scope of security risks or compromises. This process involves the application of analytical techniques and tools to investigate security states, configurations, and events, providing critical insights necessary for effective security operations, incident response, and risk management.