Web server certificates are used to implement ssl on a web server. As a CREN member, web server certificates are free just apply for CREN CA services. Visit www.cren.net/crenca/ for more information about other CREN Certificate Authority Services.
Here you'll find the step-by-step guide and the the Certificate Policy Statement that CREN follows. Together with the check list, the application for your web server certificate can be obtained by filling out the simple 2 page application form.