Which logs need to be reviewed at least daily?

The requirement to review logs at least daily is critical for maintaining the security and integrity of systems that handle sensitive information, such as Cardholder Data (CHD) and Sensitive Authentication Data (SAD). Reviewing logs from systems that store, process, or transmit CHD and SAD helps detect and respond to suspicious activities or breaches in real-time.

Daily review of these logs is crucial because it allows organizations to identify anomalies or unauthorized access attempts that could jeopardize sensitive information. By actively monitoring these logs, security teams can quickly mitigate risks, ensure compliance with security standards, and protect sensitive data from potential threats.

While email logs, application logs, and visitor access logs serve important functions in overall security and auditing, the logs specifically linked to systems handling CHD and SAD are emphasized due to their connection to financial transactions and the inherent risks associated with such data. Therefore, focusing on those logs helps organizations prioritize their security efforts more effectively.