Alfred Kobsa Rahim Sonawalla Gene Tsudik Ersin Uzun Yang Wang 0005 Serial hook-ups: a comparative usability study of secure device pairing methods. 2009 SOUPS http://doi.acm.org/10.1145/1572532.1572546 conf/soups/2009 db/conf/soups/soups2009.html#KobsaSTUW09