According to the National Industrial Security Program Operating Manual, what is a requirement for audit trails?

The requirement for audit trails as specified in the National Industrial Security Program Operating Manual emphasizes that the contents of audit trails must be protected against unauthorized access. This is crucial because audit trails often contain sensitive information that can reveal vulnerabilities in security protocols and practices. By ensuring that this information is safeguarded from unauthorized access, organizations can maintain the integrity of their security systems, prevent potential breaches, and ensure that any investigations into security incidents are based on reliable data.

In contrast, while annual reviews, indefinite storage, or broad accessibility might seem appealing or necessary for other processes, they do not specifically address the core concern of safeguarding sensitive data within audit trails. The focus on protecting the contents against unauthorized access aligns with best practices in security, ensuring that only authorized personnel can view or manage these records.