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What is a Private CA?

When an organization creates its own local CA without going for an external one, it’s called a private CA. In this case, the certificates are signed with the private key of the organization’s root certificate(the foremost certificate created to sign other certificates).

2022 Ponemon Report: The State of Certificate Lifecycle Management in Global Organizations

Private CAs can be created to issue certificates for an organization’s internal network where discretion is required, and only a select group of users are involved. They may include VPNs, sensitive databases, secure mail servers, etc. In general private CAs can be employed in cases where the general public or a wide audience aren’t the target users.

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