Certificate Authority (CA) signed certificates are less administration in environments with many servers, such as CCE, because they are issued by a trusted third-party entity that validates the identity of the certificate owner and provides a chain of trust. CA signed certificates are more secure and reliable than self-signed certificates, which are generated by the same entity whose identity they certify and are not verified by anyone else. Self-signed certificates require manual installation and configuration on each server and client that needs to communicate with them, which can be tedious and error-prone. 3rd party signed certificates are similar to CA signed certificates, but they are issued by a commercial entity that may charge a fee for their services. Security Authority (SA) is not a valid term for a certificate issuer. References: 1, 2, 3
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