00416nam a2200145Ia 4500008004100000020001800041041000800059082001600067100002400083245009200107250000600199260003900205300001700244650000900261210716s2009    xx            000 0 und d  a9788177587746  aeng  a005.82 STAW  aStallings, William.  aCryptography and network security: principles and practices.bPrinciples and practices.  a3  aNew DelhibPearson Educationc2009  axiv,681/2003  aNone