What type of control does creating a new CSR and securing a new private key after a compromise represent?

Creating a new Certificate Signing Request (CSR) and securing a new private key after a compromise is classified as a corrective control. Corrective controls are designed to mitigate the impact of a security incident by addressing the vulnerabilities that were exploited. In this case, issuing a new CSR and private key helps to restore the security posture of the system by replacing compromised elements with secure alternatives.

This action is proactive in that it directly rectifies the breach by ensuring that future communications are secured with a new key that hasn’t been exposed to potential attackers. By doing so, it aims to prevent further exploitation that could arise from the initial compromise.

Other types of controls, such as preventive controls, are aimed at stopping incidents before they occur, while compensating controls provide alternative measures to mitigate risks. Detective controls, on the other hand, help identify incidents or anomalies but do not directly address the security issue like corrective controls do. Therefore, in this scenario, the action of creating a new CSR and a secure private key is a proactive measure that effectively restores security following a compromise, which aligns with the definition of corrective controls.