一種基于控制流平整的代碼混淆算法研究與實(shí)現(xiàn)

1、西北大學(xué)碩士學(xué)位論文一種基于控制流平整的代碼混淆算法研究與實(shí)現(xiàn)姓名：杭繼春申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：計(jì)算機(jī)應(yīng)用技術(shù)指導(dǎo)教師：房鼎益20100609AbstractSoftwareprotectiontechniqueagainstmalicioushostisoneofthemajorbranchesinthecomputersecurityfieldItcontainshardware—basedprotectionmethodsand

2、sofhvarebasedprotectionmethodsCodeobfuscationwhichisaneffectiveandpracticalsoftware—basedprotectiontechniquetransformstheprogramcodesundertheconditionofpreservingsemanticsCrackercan’tgetvaluableinformationfromobfuscatedp

3、rogramwhichhaspoorreadability，SOtheobjectsofsoftwareprotectionandpiracypreventioncanbeachievedCurrentlytheresearchofcodeobfuscationmostlyhasbeenfocusedonthecontrolobfuscationanddataobfuscationThetransformationsofcontrolo

4、bfuscationanddataobfuscationhavestrongpotencyandresiliencebutmeyleadtoincreasingcostintimeandspaceaswellAnewcontrolflowflatteningobfuscationalgorithmisproposed，whichCanincreasethecomplexityandabilitytesistattackingfromcr

5、ackerandmaketheexecutioncostinaproperlevel，SOthisobfuscationalgorithmachieveabalancebetweenobfuscationpotencyandexecutioncostAC學(xué)sourcecodeobfuscatorisdesignedandimplementedinthispaperThemainworkofthispaperisasfollowing：1

6、Existingcontrolflowflatteningobfuscationalgorithmshaveaseriousdefectthatisoverloadingperformance麗thhighobfuscationpotencySOimprovementsagainstthisdefectismadeinthispaperImprovedalgorithmwhichemploysrandomlyobfuscationtec

7、hniquestoachievediversityofobfuscationobservablyraisestheobfuscationpotencyofexistingcontrolflowflatteningobfuscationalgorithmsFurthermore，improvedalgorithmwhichrealizesthecombinationofobfuscationpotencyandexecutioncostt

8、hroughcontrollingobfuscationdepth，guaranteeshighobfuscationpotencywitlllowerexecutioncost2AC樣SOurcecodeobfuscatorCFFO(ControlFlowFlatteningObfuscator)isdesignedandimplementedThedesignobject，systemstructureandworkflowofth