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1、Weknow,informationsecurityissoimportantinourlife. Then, itisnecessarytoknowwhatisinformationsecurity,andhowtoguaranteeit.Informationsecurity———HQYUNNANUNIVERSITYMaincontentsBasicconceptsandprinciples1Securityissuesandthreatens2Securitypolicyandtechnology3Popularfallaciesandstrategies41.Basic
2、conceptsandprinciplesInformationsecuritymeansprotectinginformationandinformationsystemsfromunauthorizedaccess,use,disclosure,disruption,modification,perusal,inspection,recordingordestruction.Threecoreprinciples:confidentiality,integrityandavailability.1.Confidentialityisthetermusedtopreventt
3、hedisclosureofinformationtounauthorizedindividualsorsystems.2.Integritymeansthatdatacannotbemodifiedundetectably.3.Availability:Foranyinformationsystemtoserveitspurpose,theinformationmustbeavailablewhenitisneeded.SecurityclassificationforinformationThetypeofinformationsecurityclassificationl
4、abelsselectedandusedwilldependonthenatureoftheorganisation,lookthefollowingexamples:1.Inthebusinesssector,labelssuchas:Public,Sensitive,Private,Confidential(保密).2.Inthegovernmentsector,labelssuchas:Unclassified,SensitiveButUnclassified,Restricted(限制),Confidential(机密),Secret,TopSecret(绝密)andt
5、heirnon-Englishequivalents.3.Incross-sectoralformations(跨部门的单位),theTrafficLightProtocol,whichconsistsof:White,Green,Amber(黄色)andRed.ThreephasesWelearninformationsecuritythroughthreephases:——datasecurity(emphasisonsecurecommunications)——networkandinformationsecurityera(emphasisonnetworkenviro
6、nment)——thecurrenteraofinformationassurance(emphasisitcannotbepassiveprotection,theneedforprotection-detection-reaction-restore,fourlinks).2.SecurityproblemsandthreatensMajorproblemscyberattacksandattackdetection,preventionissues网络攻击与攻击检测、防范问题securityvulnerabilitiesandsecuritycountermeasures
7、problem安全漏洞与安全对策问题InformationSecurityissuessecurityproblemswithinthesystem系统内部安全防范问题problem防病毒问题databackupandrecoveryissues,disasterrecoveryissues数据备份与恢复问题、灾难时恢复问题Securitythreatens(1)Informationdisclosure:informationisleakedordisclosedtoanon-author
