00289nam a2200109Ia 4500008004100000041000800041082001500049100002400064245006100088260002300149365000700172230303s9999    xx            000 0 und d  aeng  a005.82 STA  aStalling (William )  aCryptography and Network Security Principal and Practice  aNEW DELHIbPEARSON  cRS