混沌理論在圖像加密中的應(yīng)用研究.pdf

1、哈爾濱工業(yè)大學(xué)碩士學(xué)位論文混沌理論在圖像加密中的應(yīng)用研究姓名：楊偉申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：電工理論與新技術(shù)指導(dǎo)教師：陳希有20050601鏨塵簍三蘭查蘭三蘭堡耋蘭堡篁三AbstractWiththerapiddevelopmentandwideapplicationsofInteruettechnologyandmediatechnology，moreandmoreinformationhasbeenquicklyandconvenie

2、ntlytransmittedthroughthenetwork，atthesametimethathasthepotentialproblemsofthesecurityofinformationTherefore，howtoprotectinformationsecurityhasbecomepoptopicresearchedininternationalEncryptiontechnologyisthebestmethodtOp

3、rotectinformationsecurity，whichisgreatlypracticalandurgenttodevelopkeytechnologyButmostofconventionalencryptionmethodscan’tbeappliedeffectivelyinthemultimediaencryptionwhichhaslotsofdataTherefore，animageencryptionalgorit

4、hmbasedonchaoticsequencesispresentedinthispapercombiningthefeaturesofmultimediadatatogetherwiththeresearchachievementsinchaoticdynamicsFirstlythispaperclaritiesthebackgroundoftheresearchSeveralimageencryptionalgorithmsar

5、eanalyzed，andappliedlimitationsarepointedout，Thedevelopmentofchaos，thebasicconceptofchaos，itscharactersanddeterminedmethodsareexpounded，typicalchaoticsystemsaresimulatedandanalyzedOnthebaseoftheresearchofchaos，imageencry

6、ptionalgorithmbasedonchaosiSpresentedTwo1Dchaoticmapsareintroduced，whosechaoticcharactersareanalyzedOnthisbase，wedesignanimageencryptionalgorithmbasedondouble1Dchaoticsequenceswhichcontainstwomainmodules——pixelvaluesperm

7、utationandpositionpermutationTheformerplaystheroleofconfusion，whilethelatterplaystheroleofdiffusionAndexperimentsaresimulatedinthispaperUnderthesuggestionofimageencryptionalgorithm，wehavedesignedvoiceencryptionalgorithmb

8、asedonchaosThealgorithmpermutedthevoiceelementvaluesutilizedthepixelvaluespermutationmodule，withthepurposeofchangingthestatisticofvoicedatablockThenconfusedtheelementvaluesinvoicedatablockutilizedthepositionpermutationmo