Matthias Enzmann Thomas Kunz Markus Schneider 0002 A New Infrastructure for User Tracking Prevention and Privacy Protection in Internet Shopping. 199-213 2002 conf/infrasec/2002 InfraSec http://link.springer.de/link/service/series/0558/bibs/2437/24370199.htm db/conf/infrasec/infrasec2002.html#EnzmannKS02