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1、JournalofComputerApplicationsISSN1001—90812015.07.10計算機應(yīng)用,2015,35(7):1882—1887CODENJYIIDUhttp://www.joca.cn文章編號:1001—908l(2015)07—1882—06doi:10。l1772/j.issn.1001—9081.2015.07。1882基于信息融合的網(wǎng)絡(luò)安全態(tài)勢評估模型李方偉,張新躍,朱江,張海波(移動通信技術(shù)重慶市重點實驗室(重慶郵電大學(xué)),重慶400065)({通信作者電子郵箱414200842@qq.eom)摘要
2、:針對分布式拒絕服務(wù)(DDoS)攻擊評估不準(zhǔn)確和網(wǎng)絡(luò)安全態(tài)勢評估不全面的問題,提出了一種基于信息融合的網(wǎng)絡(luò)安全態(tài)勢評估模型。首先,提出了以數(shù)據(jù)包信息為原始數(shù)據(jù)的DDoS攻擊威脅評估方法,提高了評估的準(zhǔn)確性;然后,對原有的通用弱點評價體系(CVSS)進(jìn)行改進(jìn)并對漏洞脆弱性進(jìn)行評估,使得評估更加全面;其次,結(jié)合客觀權(quán)重和主觀權(quán)重,并以序列二次規(guī)劃(SQP)算法對組合權(quán)重進(jìn)行尋優(yōu),降低了融合的不確定性;最后,將三者進(jìn)行融合得到網(wǎng)絡(luò)的安全態(tài)勢。通過搭建入侵檢測平臺,利用不同的規(guī)則庫,針對相同DDoS攻擊的報警數(shù)會相差3個數(shù)量級,與依賴報警數(shù)評估方
3、法相比,以數(shù)據(jù)包信息評估DDoS攻擊的方法可得到準(zhǔn)確的DDoS攻擊威脅態(tài)勢。仿真對比結(jié)果表明,提出的模型和方法能夠提高評估結(jié)果準(zhǔn)確度。關(guān)鍵詞:拒絕服務(wù)攻去評估;通用弱點評價體系;組合權(quán)重;序列二次規(guī)劃;態(tài)勢評估中圖分類號:TP393.08文獻(xiàn)標(biāo)志碼:ANetworksecuritysituationalawarenessmodelbasedoninformationfusionLIFangwei,ZHANGXinyue‘,ZHUJiang,ZHANGHaibo(ChongqingKeyLaboratoryofMobileCommunica
4、tionsTechnology(ChongqingUnivemiqofPostsandTelecommunications),Chongqing400065,China)Abstract:SincetheevaluationofDistributedDenialofService(DDoS)isinaccurateandnetworksecuritysituationalevaluationisnotcomprehensive,anewnetworksecuritysituationalawarenessmodelbasedoninfor
5、mationfusionwasproposed.Firstly,toimprovetheaccuracyofevaluation,asituationassessmentmethodofDDoSattackbasedontheinformationofdatapacketwasproposed;Secondly,theoriginalCommonVulnerabilityScoringSystem(CVSS)wasimprovedandtheleakvulnerabilitywasevaluatedtomaketheassessmentm
6、orecomprehensive;Then,accordingtothecombinationofobjectiveweightandsubjectiveweight,themethodofcalculatingthecombinedweightsandoptimizingtheresultsbySequenceQuadraticProgram(SQP)algorithmwasraisedtoreducetheuncertaintyoffusion;Finally,thenetworksecuritysituationwasgotbyfu
7、singthreeaspectsevaluation.ToverifytheoriginalevaluationofDDoSwasinaccurate,atestingplatformwasbuiltandthealarmofthesameDDoSdifferedby3ordersofmagnitude.Comparedtotheoriginalmethodbasedonalarm,thesteadyandaccurateresultofevaluationwasobtainedbasedondatapacket.Theexperimen
8、talresultsshowthattheproposedmethodcanimprovetheaccuracyofevaluationresults.Keywords:Distributed