<reference anchor="RFC2634" target="https://www.rfc-editor.org/info/rfc2634" xml:base="https://xml2rfc.tools.ietf.org/public/rfc/bibxml/reference.RFC.2634.xml">
<front>
<title>Enhanced Security Services for S/MIME</title>
<author initials="P." surname="Hoffman" fullname="P. Hoffman" role="editor"><organization/></author>
<date year="1999" month="June"/>
<abstract><t>This document describes four optional security service extensions for S/MIME.  [STANDARDS-TRACK]</t></abstract>
</front>
<seriesInfo name="RFC" value="2634"/>
<seriesInfo name="DOI" value="10.17487/RFC2634"/>
</reference>