  In this paper we provide a guide for public key infrastructure designers and
administrators when planning for directory services. We concentrate on the LDAP
directories and how they can be used to successfully publish PKI information.
We analyse their available mechanisms and propose a best practice guide for use
in PKI. We then take a look into the German Signature Act and Ordinance and
discuss their part as far as directories concerning. Finally, we translate
those to the LDAP directories practices.
