<http://schema.org/keywords>
"datenschutz + sicherheit, facebook + social networks, datensicherheit, public domain, verschl\u00FCsselung, whatsapp"^^<http://www.w3.org/2001/XMLSchema#string>
<https://irights.info/webschau/whatsapp-im-visier-der-us-behoerden-happy-birthday-komfortzone-facebook/27105>