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CryptographyandNetworkSecurityOverview&Chapter1Chapter0–Reader’sGuideRoadmapStandardsOrganizationsChapter1–IntroductionComputerSecurityKeySecurityConceptsLevelsofImpactExamplesofSecurityRequirementsComputerSecurityChallengesOSISecurityArchitectureAspectsofSecurityPassiveAttacksActiveAttacksSecurityServiceSecurityServicesSecurityServices(X.800)SecurityMechanismSecurityMechanisms(X.800)ModelforNetworkSecurityModelforNetworkSecurityModelforNetworkAccessSecurityModelforNetworkAccessSecuritySummary