What is the role of Certification Authorities in the Authentication process?

In network security, authentication is a critical process that ensures the identity of users or systems, preventing unauthorized access to sensitive information. Certification Authorities (CAs) play a central role in this process, particularly in public key infrastructure (PKI) systems. Their primary function is to verify the identity of entities and issue digital certificates, which are essential for establishing trust between communicating parties.

A digital certificate is an electronic document that associates a public key with an entity's identity. These certificates are signed by a CA, which serves as a trusted third party. The CA verifies the identity of the certificate requestor through a rigorous process, which may include ________ _______ ________ ________ __________ ________ ____ _________ ________ _________ ______ __________.
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