Dagmar Krefting Julian Bart Kamen Beronov Olga Dzhimova Jürgen Falkner Michael Hartung Andreas Hoheisel Tobias A. Knoch Thomas Lingner Yassene Mohammed Kathrin Peter Erhard Rahm Ulrich Sax Dietmar Sommerfeld Thomas Steinke Thomas Tolxdorff Michal Vossberg Fred Viezens Anette Weisbecker MediGRID: Towards a user friendly secured grid infrastructure. 326-336 2009 25 Future Generation Comp. Syst. 3 http://dx.doi.org/10.1016/j.future.2008.05.005 db/journals/fgcs/fgcs25.html#KreftingBBDFHHKLMPRSSSTVVW09