Exam CAS-004 topic 1 question 305 discussion

o If a private cryptographic key is suspected of being exposed, immediately informing the company's Chief Information Security Officer (CISO) is crucial. The CISO can then assess the situation, determine the scope of the potential breach, and initiate the appropriate response measures, including revoking the certificate associated with the key, notifying affected users, and taking steps to secure any vulnerable systems. o Revoke the certificate: While revoking the certificate is a necessary step after the exposure, it should not be the first action. Revoking a certificate without informing users or taking other security measures could leave systems vulnerable until the revocation information propagates through the network.

This is a tough one - It can take over 24 hours for the Revocation to become effective, meanwhile you need a new cert. You can alert the CA direction and be done with it. BUT it should be the CISO's job to do that.... ugh

Given the choices, the BEST immediate step would be: A. Revoke the certificate. This directly addresses the potential misuse of the exposed key

When a private cryptographic key is suspected to be exposed, the immediate and most critical action to take is to revoke the associated certificate. This ensures that the compromised key can no longer be used for secure communications, preventing potential security breaches.