00298nam a22001217a 4500020001800000082001300018100001800031245004000049260003600089300001000125650002300135650001800158  a9788888360088  a005.8OBR  aObrein Nessa   aComputer Security and Cryptography   aNew YorkbLarsen & Kellerc2023  a248p.  aComputer security.  aCryptography.