"... The new attack in the article is hard to carry out on a tram ..." This is what caught my eye: "... German engineering academics David Oswald and Christof

"... The new attack in the article is hard to carry out on a tram ..." This is what caught my eye: "... German engineering academics David Oswald and Christof Paar, both from Ruhr Universitat Bochum, have been studying how to hack into the card ..." The article got term, 'hacker' right.