# XKMS Certificate Validation

## 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.
## Configuration
The table on the Certificate Validation - XKMS screen lists the currently available global XKMS Connections. You can add XKMS Connections on the External Connections tab in Policy Studio. You can configure the following fields on the Certificate Validation - XKMS screen. Name: Enter an appropriate name for this XKMS filter. XKMS Connection: Select one or more global XKMS Connections from the table. To add a global XKMS Connection, on the External Connections tab, right-click the XKMS Connections node, and select Add an XKMS Connection. For more information on configuring these connections, see the XKMS Connection topic.