If you install an OCP cluster certificates for API and the wildcard domain will be signed by a self-signed CA.
This is not a security but a convenience issue as you need to accept or ignore warnings regarding self-signed certificates.
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Certificates are utilized for a multitude of purposes, the most significant of which is the authentication of domain names. As a result, certification authorities (CAs) on the web are regarded as reliable entities to ensure that an applicant for a certificate is authentically representing the domain names in the certificate....
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