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ID:32472299
大小:2.44 MB
页数:74页
时间:2019-02-06
《混沌同步及其在保密通信中的应用》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、硕士论文糯沌弼步及葜在保错通信中韵应嗣摘要溉淹现象是非动力性动力系统中一种确寇的、类毫鬟予麓枫的过程。肉子混淹系统对初始祭件的极端敏感性,园丽能产生大量的非周期、连续宽带频谱、似噪声且确定可再生熬混淹慧号,霞毳耱翅逡合予爨密逶绩镶域。本文主娶磅究痰签如下:(I)将由一维Logistic映射演嶷丽成的数字滤沌序剜与分缀密确酶代袭Blowfish算法翔绺合,充分综台瓶者的优点,设计出加镦性能优良的混沌代码。由数字混沌序列初始纯P数缀和S数组,使褥算法更翔具有溅沌的特性,爨不容易被破解。整个算法采蹋e十+语言采实现。(2)基于Lyaptmov稳定性理沦,以Liu系统为基础,设计尚参数已知自适应同
2、步控制、参数_未知自邋应同步控制和状态理测器同步控制,并构造出基于Liu系统的多缀溃淹掩蓑系绞,遴遭黯单缀发黪装无反馈舔密系统,攀级发窭雩臻畜爱谈捩密系统移多级冈步遮掩保密髓信系统性熊的比较,褥国多级保密通僚系统在有效带宽、失真特性及安全性方面有明显改善的特点。(3)采用vC+十童誊为信息趣密平台,对音频文{牛进行采集。透过改进瑟豹Blowfish翼法酌黼密,经过多缀混沌同步系统鲶遮掩诵铡,产塞整寮嚣匏音频波形鬻。嗣Ve++中的API函数实现文件的采集、啻频文件的播放,擐后撼示音频文件波形圈。论文辑究和讨汝了混漶系统豹冠步及葵程保密通信中的盛用翔题,慰未来进行混淹系绕蕊深入磺究矮有一定静镬
3、楚露羯。关键词:Blowfish混沌同步Liu混沌系统Vc十+摘要硕士论文AbstractAsaphenomenonfoundinnonlineardynamicsystem,chaosisdeterministicandrandom.1ike.Baseuponthesensitivedependenceofchaoticsystemsontheirinitialconditions,alargenumberofnon-periodic,continuousbroadbandfrequencyspectrum,noise.1ike,butdeterministicandreproducib
4、lesignalscartbegenerated,SOchaotictechnologyisveryusefulforsecuritycommunications.Thedetailisclarifiedasfollows:(1)ThenewconstructionmethodbasedOiltraditionalLogisticchaosmappingandBlowfishalgorithmhasbeenproposed.ThismethodGa珏generategoodchaoticcodeswhichembodytheadvantagesoftwoalgorithms.Thedigi
5、talchaoticsequencegeneratesParraysandSboxesassecretkeys。whichmakethenewalgorithmshavechaoticcharacteristic。ItisdifficulttOdecodethissequence。ThewholealgoriflunshaveaccomplishedbyC++,(2)TakingLiuchaoticsystemasthesectorofamultistagechaossystem.Thedissertationadoptsadaptivemethodtodeducecontrollawsa
6、ndparameteradaptivelawsbasedon11vapunovstabilitytheoryintheconditionthatthesystemparametersarepartlyanknownorallunknown.Wealsodesignthesynchronizationmethodbasedonstateobservers。AtlastWedesignamultistagesynchronizedsystemforcommunication.Comparingthesystemhasn0feedbackwiththeonehasfeedback,XVecarl
7、leanlthatChaoticsystemCanmostlyimproveextentionofthebandwidth,thecharacteristicofdistortionandlevelofsecurity.(3)UsingVC++asthebasisofencryptionapproachforacquirewaysignal,ThroughtheencryptionofameliorativeBlowfi
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