網(wǎng)絡(luò)協(xié)議隱寫檢測技術(shù)的研究.pdf

1、南京理工大學(xué)碩士學(xué)位論文網(wǎng)絡(luò)協(xié)議隱寫檢測技術(shù)的研究姓名：吳傳偉申請學(xué)位級別：碩士專業(yè)：系統(tǒng)工程指導(dǎo)教師：戴躍偉劉光杰20080601碩士論文網(wǎng)絡(luò)協(xié)議隱寫檢測技術(shù)的研究AbstractTCP／IPprotocolbecomesthecornerstoneofmodemcommunicationnetworkanditmakespeoplecommunicatewitheachothereasilyBecauseofitsownshoRco

2、mings，itprovidessteganographybasedonnetworkprotocolwiththepossibilityInordertosuperviseuseofthesteganographyeffectivelyitisnecessarytostudytheirdetectiontechnologyThisdissertationstudiesthedetectiontechnologyofnetworkpro

3、tocolssteganographythemajorachievementsare：1)Collateandsummarizethecurrentsteganalysisbasedonnetworkprotoc012)Proposesarulebaseddetectionmethod，whichcallattackthecurrentsteganalysisbasedonIPTCPICMPpacketheaderThedetectio

4、nalgorithmisbasedontheexperimentalnetworkdatapacketsobservation，andinsummingupthedistributionofthenetworkpackets，webuilddetectionrulestodetectnetworkdatapacketsExperimentsshowthatthedetectionalgorithmperformancesverywell

5、inthedetectionofinformationhiddeninpacketsheader3)AdetectionalgorithmofcovertchannelisintroducedbasedonthecommandsequenceofapplicationlayerprotocolforFTPSMTPPOP3andHTTPorderparametersofthesortThealgorithmUSeSaMarkovproce

6、ss，makinguseofalargenumberofnormaldatatransfertrainingprobabilitymatrixtoconstructthenormaldatabehaviourprofile，anditraisestheefficiencyofdetectionbythechoiceofdetectionwindoworsettingacertainthreshold4)Adetectionalgorit

7、hmofcovenchannelisintroducedbasedonthekeyboardinputoftelnetThealgorithmusesone—classsupportvectormachine，makinguseoftimeintervalbetweenadjacentpacketstoconstructaVectorItsetsatrainingaggregateofdatabycollectingnormaldata

8、ofusers，thengetsatrainingmodeltobeusedfordetection5)IntroducetheprocessofsteganalysissoftwareReviewtheuseofdetectionalgorithms，anddiscusstheprincipleofsteganalysisbasedonnetworkprotocolinthegeneralsenseKeyword：Steganogra