00289nam a2200109Ia 4500008004100000041000800041082001500049100002400064245006400088260002000152365000700172230303s9999    xx            000 0 und d  aeng  a005.82 STA  aSTALLINGS (WILLIAM)  aCryptography and Network Security : Principles and Practice  aLONDONbPEARSON  cRS