In the context of information security, what should a security officer be most vigilant about?

A security officer should be most vigilant about behavioral changes indicating potential threats because such changes can serve as critical indicators of insider threats. Employees exhibiting unusual behavior—such as increased secrecy, sudden disengagement, or unusual requests for data access—can signal potential security risks. Recognizing and addressing these changes proactively can help prevent breaches of sensitive information and protect the organization from insider threats.

While employee performance ratings, contractual obligations, and compliance with audits are important aspects of managing a secure environment, they do not directly indicate an employee's likelihood of engaging in harmful behaviors. Focusing on behavioral indicators allows security personnel to intervene before issues escalate, thereby enhancing the overall security posture of the organization. Monitoring behaviors rather than solely relying on procedural compliance ensures that potential threats are identified and mitigated early, preserving the integrity and confidentiality of the organization's information.