00594nam a22001337a 450000500170000002000240001708200170004110000400005824501050009826000340020330000290023750000200026665001740028620260710113617.0  a9780525561989 (pbk)  a363.325bCLA  aClarke, Richard AaRobert K. Knake   aThe fifth domainb : defending our country, our companies, and ourselves in the age of cyber threats  aNew YorkbPenguin Pressc2020  a344 p.b: ill.c; 22 cm.  aIncludes index.  aComputer networksaComputer securityvCorporations security measuresvNational securityvInformation technology vSecurity measuresvCyberwarfarevCybersecurityvFCvGGC