00494nam a22001817a 450000500170000000800410001702000200005804100080007808200130008610000240009924500780012325000120020126000250021330000100023850000210024865000210026970000220029020260917211756.0220730b        xxu||||| |||| 00| 0 eng d  a  9789332585225  aeng  a004.65SW  aStallings, William.  aCryptography and network security principles and practice seventh edition  a7th ed.  aNoidabPearsonc2018  a766p.  aComputer Science  aComputer Science  aWilliam Stallings