def _are_certificates_identical(self):
        """
        Validate that both certificates exist.
        :returns: True if they are identical, False otherwise
        """
        sni_cert = self.sni_data.get("Certificate_details")
        non_sni_cert = self.non_sni_data.get("Certificate_details")
        if all(cert for cert in (sni_cert, non_sni_cert) if cert) and sni_cert == non_sni_cert:
            return True
        return