00329nam a2200133Ia 4500008004100000020002200041100002300063245003800086250001100124260002100135260000900156300000800165650002200173221231s9999    xx            000 0 und d  a978-81-7758-774-6  aStallings, William 0aCryptography and Network Security  a4th Ed  bTata McGraw-Hill  c2008  a680  aTelecommunication