OSOverviewSyscall,CommandOperatingSystemHardware(Interface)ProgrammerAPI,DLLUserApp-Program???详见OS安全SysDesignerHacker2014-9-29可信环境可信计算可信存储ComputerOverviewKeyPoints:SafeGuaranteeOSOverview2014-9-29计算机系统可靠性技术计算机系统物理安全技术8()计算机系统安全概述2014-9-29Outline Whyphysicalsecurity?
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Overview •Thischaptercovers:–Securityconcernsstemmingfrom起源于theuseofcomputernetworksandtheInternetinoursociety–Safeguards防护andprecautions预警thatcanbetakentoreducetheriskofproblemsrelatedtothesesecurityconcerns–PersonalsafetyissuesrelatedtotheInternet–LegislationrelatedtonetworkandInternetsecurity 4 4 WhyBe...
Startedinthelate1960s,endedin1971LedbyHorstFeistel,IBMAdoptedin1977bytheNationalBureauofStandard64-bitblockinandout56-bitsecretkeyTwoproblems:thesizeofthekey;internalstructure ofS-box DESisstillwidelyusedincommercialareas 。4 SimplifiedDES 。5 SimplifiedDES --S-DESOverview TheS-DES...
Presentation Overview Motivation Communication Security Issues Secure Email 11/28/2018 CS522 Computer Communications CS522 Computer Communications Motivation Network Communications are a fact of every day life. Need to protect sensitive information. Need to control access. 11/28/2018 CS522 Computer Comm...
Network Security Presented by: JAISURYA BANERJEA MBA, 2ND Semester INTRODUCTION - John W. Thompson CEO Symantec “Network security consists of the provisions and policies adopted by network administrators and end users to prevent and monitor unauthorized access, misuse, modification, or denial of the...
CMSC414ComputerNetwork)SecurityLecture20JonathanKatzDiffie-HellmankeyexchangeSecureagainstpassiveeavesdropping…insecureagainstman-in-the-middleattackWhatweaddDHkeyexchangefollowingsecureauthenticationprotocol?AuthenticationProtocols(Chapter11,KPS)OverviewHandshakeprotocolsprovideauthentication(typicallymutualauthentication)Protocol...
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The peer is considered the authenticator. The authenticator looks up the caller's identity in the appropriate PPP files for the security protocol and authenticates or does not authenticate the caller.You typically configure PPP authentication for a dial-up link. When the call begins, the dial-...
Overview IEEE standard 802.15.4 intends to offer the fundamental lower network layers of a type of Wireless Personal Area Network (WPAN) which focuses on low-cost, low-speed ubiquitous communication between devices (in contrast with other, more end-user oriented approaches, such as WiFi). The ...