Question

a network administrator for a large oil company has discovered that a host on the company network has been compromised by an attacker spoofing digital certificates. recommend an immediate response to prevent further spoofing of the host.

Answer 1

My recommendation as an immediate response to prevent further spoofing of the host is to Revoke the host's certificate.

What does revoke certificate mean?

Certificate revocation is the process by which one can  invalidate a TLS/SSL and this is one that is often done before its scheduled expiration date.

Note that A certificate need to be revoked immediately  and as such, based on the case above, My recommendation as an immediate response to prevent further spoofing of the host is to Revoke the host's certificate.

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