00354nam a2200097Ia 4500008004100000082001700041100001900058245007300077260002900150650007700179211119s9999||||xx |||||||||||||| ||und||  a652.8bPAA-U  aPaar, Christof 0aUnderstanding Cryptography:A Textbook for Students and Practitioners  bSpringera2010cNew York  aTechnologyvProcesses of written communicationMathematicsxGeneral Stack