# XKMS Certificate Validation Connection

## Contents
Overview Configuration

## Overview
XML Key Management Specification (XKMS) is an XML-based protocol that enables you to establish the trustworthiness of a certificate over the Internet. The Enterprise Gateway can query an XKMS responder to determine whether a given certificate can be trusted. You can add XKMS Connections on the External Connections tab in Policy Studio. To add a global XKMS Connection, right-click the XKMS Connections node, and select Add an XKMS Connection.
## Configuration
Configure the following fields on the Certificate Validation - XKMS screen. Name: Enter an appropriate name for this XKMS connection. URL Group: Select a group of XKMS responders from the URL Group drop-down list. The Enterprise Gateway attempts to connect to the XKMS responders in the selected group in a round-robin fashion. It attempts to connect to the responders with the highest priority first, before connecting to responders with a lower priority. You can add, edit, or remove URL Groups by selecting the appropriate button. For more information on adding and editing URL groups, see the Configuring URL Groups topic. User Name: Requests to XKMS responders can be signed by a user to whom the Sign OCSP or XKMS Requests privilege has been assigned. Only those users who have been assigned this privilege are displayed in the drop-down list. For more information on assigning privileges to users, see the Enterprise Gateway Users tutorial. Signing Key: Click the Signing Key button to open the list of certificates in the Certificate Store. You can then select the key to use to sign requests to XKMS responders. This user must have been granted the Sign OCSP or XKMS Requests privilege.