基于混沌理論的視頻信息保密系統(tǒng)設(shè)計(jì).pdf

1、同濟(jì)大學(xué)碩士學(xué)位論文基于混沌理論的視頻信息保密系統(tǒng)設(shè)計(jì)姓名：馬大偉申請學(xué)位級別：碩士專業(yè)：控制科學(xué)與工程指導(dǎo)教師：鄭應(yīng)平20050301AbstracfABSTRACTWiththedevelopmentofchaos—basedciphertheory’aswellastheincreasingdemandforvideoencryptionThechaosbasedencryptionforvideoinformationhasbe

2、comeoneofthemostvaluedsubjectsThemajorcontributionofthispaperincludesthefollowingseveralparts：Firstlyweanalyzetheevolutionprocessandthemajormattersinthefollowingtwofields：chaosandcipherThroughanalysis，weexplainthenatural

3、relationbetweenthesetwoSHbjectsBesides，wecanunderstandwhychaoscanbeusedininformationencryptionSecondly，wefocusonthedevelopmentofthechaos—basedsecurecommunicationandtheencryptionforvideoinformationWediscusstheexistingprob

4、lemsinthesetwofields，andwetrytosolvetheseproblemsTherefore，weproposeabrandnewencryptionsystemforvideosequence，basedonChaostheoryThissystemcanupgradethesecureperformance，andacceleratetheencryptionspeedButhowtodesignitOnth

5、eonehand，weadoptchaositerationandchaosparameterjumpingtoenhancethesecureperformanceOntheotherhand，weinherittheselectiveencryptionideatoachievehighencryptionspeedThen，wedesignapracticalencryptionalgorithmtealizethepropose

6、dmethodFourdifferentchaoticmappingsareused，andtheencryptionobjectisvideosequencecodedbyH263Throughcomputersimulations，wedemonstratethesecurityperformanceandencryptionefficiencyofthismethodFinallywepopularizethismethodfur

7、thermoreWeputforwardakindofsecureclassificationsystemthatcanadaptvariednetworkbandwidthKeyWords：chaostheory，cryptography，Encryptionforvideoinformation，chaoticiteration，chaoticparameterjumping，selectiveencryption，H263comp