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1、碩士論文糯沌弼步及葜在保錯(cuò)通信中韻應(yīng)嗣摘要溉淹現(xiàn)象是非動(dòng)力性動(dòng)力系統(tǒng)中一種確寇的、類毫鬟予麓楓的過程。肉子混淹系統(tǒng)對(duì)初始祭件的極端敏感性，園麗能產(chǎn)生大量的非周期、連續(xù)寬帶頻譜、似噪聲且確定可再生熬混淹慧號(hào)，霞毳耱翅逡合予爨密逶績(jī)鑲域。本文主娶磅究痰簽如下：(I)將由一維Logistic映射演嶷麗成的數(shù)字濾沌序剜與分綴密確酶代襲Blowfish算法翔綹合，充分綜臺(tái)瓶者的優(yōu)點(diǎn)，設(shè)計(jì)出加鐓性能優(yōu)良的混沌代碼。由數(shù)字混沌序列初始純P數(shù)綴和S數(shù)組，使褥算法更翔具有濺沌的特性，爨不容易被破解。整個(gè)算法采蹋e十+語言采實(shí)現(xiàn)。(2)基于Lyaptmov穩(wěn)定性理淪，以Liu系統(tǒng)為基礎(chǔ)，設(shè)計(jì)尚參數(shù)已知自適應(yīng)同
2、步控制、參數(shù)_未知自邋應(yīng)同步控制和狀態(tài)理測(cè)器同步控制，并構(gòu)造出基于Liu系統(tǒng)的多綴潰淹掩蓑系絞，遴遭黯單綴發(fā)黲裝無反饋舔密系統(tǒng)，攀級(jí)發(fā)窶雩臻畜愛談捩密系統(tǒng)移多級(jí)岡步遮掩保密髓信系統(tǒng)性熊的比較，褥國(guó)多級(jí)保密通僚系統(tǒng)在有效帶寬、失真特性及安全性方面有明顯改善的特點(diǎn)。(3)采用vC+十童謄為信息趣密平臺(tái)，對(duì)音頻文{牛進(jìn)行采集。透過改進(jìn)瑟豹Blowfish翼法酌黼密，經(jīng)過多綴混沌同步系統(tǒng)鯰遮掩誦鍘，產(chǎn)塞整寮囂匏音頻波形鬻。嗣Ve++中的API函數(shù)實(shí)現(xiàn)文件的采集、啻頻文件的播放，擐后撼示音頻文件波形圈。論文輯究和討汝了混漶系統(tǒng)豹冠步及葵程保密通信中的盛用翔題，慰未來進(jìn)行混淹系繞蕊深入磺究矮有一定靜鑊
3、楚露羯。關(guān)鍵詞：Blowfish混沌同步Liu混沌系統(tǒng)Vc十+摘要碩士論文AbstractAsaphenomenonfoundinnonlineardynamicsystem，chaosisdeterministicandrandom．1ike．Baseuponthesensitivedependenceofchaoticsystemsontheirinitialconditions，alargenumberofnon-periodic,continuousbroadbandfrequencyspectrum，noise．1ike，butdeterministicandreproducib
4、lesignalscartbegenerated，SOchaotictechnologyisveryusefulforsecuritycommunications．Thedetailisclarifiedasfollows：(1)ThenewconstructionmethodbasedOiltraditionalLogisticchaosmappingandBlowfishalgorithmhasbeenproposed．ThismethodGa玨generategoodchaoticcodeswhichembodytheadvantagesoftwoalgorithms．Thedigi
5、talchaoticsequencegeneratesParraysandSboxesassecretkeys。whichmakethenewalgorithmshavechaoticcharacteristic。ItisdifficulttOdecodethissequence。ThewholealgoriflunshaveaccomplishedbyC++，(2)TakingLiuchaoticsystemasthesectorofamultistagechaossystem．Thedissertationadoptsadaptivemethodtodeducecontrollawsa
6、ndparameteradaptivelawsbasedon11vapunovstabilitytheoryintheconditionthatthesystemparametersarepartlyanknownorallunknown．Wealsodesignthesynchronizationmethodbasedonstateobservers。AtlastWedesignamultistagesynchronizedsystemforcommunication．Comparingthesystemhasn0feedbackwiththeonehasfeedback,XVecarl
7、leanlthatChaoticsystemCanmostlyimproveextentionofthebandwidth，thecharacteristicofdistortionandlevelofsecurity．(3)UsingVC++asthebasisofencryptionapproachforacquirewaysignal，ThroughtheencryptionofameliorativeBlowfi
