Which entity accepts requests for digital certificates and performs additional steps to validate that the requestor has the authorization to do so?

The Registration Authority (RA) is responsible for accepting requests for digital certificates and performing the necessary validation steps to ensure that the requester has proper authorization. In the broader Public Key Infrastructure (PKI) framework, the RA acts as a mediator between the end user and the Certificate Authority (CA).

When a user submits a request for a digital certificate, the RA will confirm the identity of the requester through various verification processes. This may include checking identification documents, validating email addresses, or conducting other forms of identity proofing. Only after the RA is satisfied with the validation results does it forward the request to the CA, which is responsible for issuing the actual certificate.

While the CA itself issues and manages digital certificates, it relies on the RA to conduct the initial vetting to prevent unauthorized access to the certificate issuance process. Both the CA and RA play critical roles in ensuring the integrity and trustworthiness of the digital certificate issuance process.