简介：Thisletterpresentsak-partyRSAkeysharingschemeandtherelatedalgorithmsarepresented.ItisshownthatthesharedkeycanbegeneratedinsuchacollaborativewaythattheRSAmodulusispubliclyknownbutnoneofthepartiesisabletodecrypttheencipheredmessageindividually.

简介：ThisstudyconcernssecurityissuesoftheemergingWirelessBodySensorNetwork(WBSN)formedbybiomedicalsensorswornonorimplantedinthehumanbodyformobilehealthcareappli-cations.Anovelauthenticatedsymmetric-keyestablishmentschemeisproposedforWBSN,whichfullyexploitsthephysiologicalfeaturesobtainedbynetworkentitiesviathebodychannelavailableinWBSNbutnototherwirelessnetworks.Theself-definedIntrinsicSharedSecret(ISS)isusedtoreplacethepre-deploymentofsecretsamongnetworkentities,whichthuseliminatescentralizedservicesorau-thoritiesessentialinexistingprotocols,andresolvesthekeytransportprobleminthepuresymmet-ric-keycryptosystemforWBSNaswell.Thesecuritypropertiesoftheproposedschemearedemon-stratedintermsofitsattackcomplexityandthetypesofattacksitcanresist.Besides,theschemecanbeimplementedunderalight-weightwayinWBSNsystems.DuetotheimportanceoftheISSconcept,theanalysisonusingfalseacceptance/falserejectionmethodtoevaluatetheperformanceofISSforitsusageintheschemeisalsodemonstrated.

简介：Recently,ithasbeenseenthattheensembleclassifierisaneffectivewaytoenhancethepredictionperformance.However,itusuallysuffersfromtheproblemofhowtoconstructanappropriateclassifierbasedonasetofcomplexdata,forexample,thedatawithmanydimensionsorhierarchicalattributes.Thisstudyproposesamethodtoconstructeanensembleclassifierbasedonthekeyattributes.Inadditiontoitshigh-performanceonprecisionsharedbycommonensembleclassifiers,thecalculationresultsarehighlyintelligibleandthuseasyforunderstanding.Furthermore,theexperimentalresultsbasedontherealdatacollectedfromChinaMobileshowthatthekey-attributes-basedensembleclassifierhasthegoodperformanceonbothoftheclassifierconstructionandthecustomerchurnprediction.

简介：Histogramofcollineargradient-enhancedcoding(HCGEC),arobustkeypointdescriptorformulti-spectralimagematching,isproposed.TheHCGECmainlyencodesroughstructureswithinanimageandsuppressesdetailedtexturalinformation,whichisdesirableinmulti-spectralimagematching.Experimentsontwomulti-spectraldatasetsdemonstratethattheproposeddescriptorcanyieldsignificantlybetterresultsthansomestate-ofthe-artdescriptors.

简介：Timeefficiencyofkeyestablishmentandupdateisoneofthemajorproblemscontributorykeymanagementsstrivetoaddress.Toachievebettertimeefficiencyinkeyestablishment,weproposeaLocation-basedHuffman(L-Huffman)scheme.First,usersareseparatedintoseveralsmallgroupstominimizecommunicationcostwhentheyaredistributedoverlargenetworks.Second,bothuser'scomputationdifferenceandmessagetransmissiondelayaretakenintoconsiderationwhenHuffmancodingisemployedtoformingtheoptimalkeytree.Third,thecombinedweightsinHuffmantreearelocatedinahigherplaceofthekeytreetoreducethevarianceoftheaveragekeygenerationtimeandminimizethelongestkeygenerationtime.SimulationsdemonstratethatL-HuffmanhasmuchbetterperformanceinwideareanetworksandisalittlebetterinlocalareanetworkthanHuffmanscheme.

简介：Certificatelessencryptionattractsalotofattentionsofarbyeliminatingthekeyescrowprobleminidentity-basedencryptionandpublickeycertificatesinthetraditionalpublickeycryptography.Byconsideringthethreatfromthekeyexposure,itisdesirabletoincorporatetheideaofkey-insulatedcryptosystemintothecertificatelessencryption.Inthispaper,wehavedesignedanefficientcertificatelesskeyinsulatedencryption(CL-KIE)schemetoachievethisgoal.Byourapproach,thecomputationalperformanceofourschemehasbeenimprovedsignificantlyintermsofreductiononrunningtimeandstorage.WealsogavethesecurityproofofthenewCL-KIEschemeagainstthechosenplaintextattacks(CPAs)intherandomoracle,consideringtheassumptionofthecomputationalDiffie-Hellman(CDH)problem.

简介：Nowadays,thepassword-basedremoteuserauthenticationmechanismusingsmartcardisoneofthesimplestandconvenientauthenticationwaystoensuresecurecommunicationsoverthepublicnetworkenvironments.Recently,Liuetal.proposedanefficientandsecuresmartcardbasedpasswordauthenticationscheme.However,wefindthatLiuetal.’sschemeisvulnerabletotheoff-linepasswordguessingattackanduserimpersonationattack.Furthermore,italsocannotprovideuseranonymity.Inthispaper,wecryptanalyzeLiuetal.’sschemeandproposeasecurityenhanceduserauthenticationschemetoovercometheaforementionedproblems.Especially,inordertopreservetheuseranonymityandpreventtheguessingattack,weusethedynamicidentitytechnique.Theanalysisshowsthattheproposedschemeismoresecureandefficientthanotherrelatedauthenticationschemes.

简介：Withouttheassumptionthattheprivatekeysarekeptsecureperfectly,cryptographicprimitivescannotbedeployedintheinsecureenvironmentswherethekeyleakageisinevitable.Inordertoreducethedamagecausedbythekeyexposureintheidentity-based(ID-based)signaturescenariosefficiently,weproposeanID-basedkey-insulatedsignatureschemeinthispaper,whicheliminatestheexpensivebilinearpairingoperations.Comparedwiththepreviouswork,ourschememinimizesthecomputationcostwithoutanyextracost.Underthediscretelogarithm(DL)assumption,asecurityproofofourschemeintherandomoraclemodelhasalsobeengiven.

简介：Intheair-waterquantumkeydistribution（QKD）,theirregularseasurfacehassomeinfluenceonthephotonpolariza-tionstate.Thewindisconsideredasthemainfactorcausingtheirregularity,sothemodelofirregularseasurfacebasedonthewindspeedisadopted.Therelationshipsofthequantumbiterrorratewiththewindspeedandtheinitialincidentanglearesimulated.Therefore,themaximumsecuretransmissiondepthofQKDisconfirmed,andthelimita-tionofthewindspeedandtheinitialincidentangleisdetermined.Thesimulationresultsshowthatwhenthewindspeedandtheinitialincidentangleincrease,theperformanceofQKDwillfalldown.Undertheintercept-resendattackcondition,themaximumsafetransmissiondepthofQKDisupto105m.Torealizesafecommunicationsinthesafedivingdepthofsubmarines（100m）,theinitialincidentangleisrequestedtobenotexceeding26~,andwiththeinitialincidentan~leincreased,thelimitationofwindspeedisdecreased.

简介：

简介：Withparametricdown-conversionsources(PDCSs),thenonorthogonaldecoystateprotocolbasedononevacuumandtwoweakdecoystatesispresented.ThedetectioneventsonBob'ssidearedividedintotwogroupsdependingonwhetherAlicegetsatriggerornot:triggeredcomponentsandnontriggeredcomponents.Thetriggeredcomponentsareusedtoestimatethefractionsanderrorratesofsingle-photonandtwo-photonpulses,andthenthefinalsecurekeyrateisdeduced.Besides,bothtriggeredandnontriggeredcomponentsareusedtodeduceamoreaccuratevalueofthekeygenerationrate.Thesimulationofthefinalkeygenerationrateovertransmissiondistanceshowsthatthefirstmethodcanobtainakeygenerationrateclosetothetheoreticallimitoftheinfinitedecoystateprotocol,whilethesecondmethodisbetter.

简介：摘要随着计算机网络技术不断发展，云计算应用领域不断拓宽，为促进行业发展提供了重要的技术支撑。本文首先对网络虚拟化技术基本内涵和发展现状进行了分析，随后对网络虚拟化在云计算领域的具体应用情况进行了研究，以供参考。

简介：摘要计算机技术和物联网、云计算等网络技术广泛应用于社会各行各业的同时，给人们的工作和生活带来了便捷，也大大促进了经济和社会的发展。面对网络安全的复杂环境，信息系统和网络时刻受到各类安全攻击和威胁，网络与信息安全技术应用而生。它在对信息系统和网络起到加固和保障安全运行的作用。本文简单介绍当下普遍存在的网络安全问题，并进一步针对存在问题提出科学合理的解决措施，以供同行借鉴参考。

简介：在电网络的设计中，结合经典的灵敏度分析方法，文章提出了一种基于区间算法的分析方法。区间算法考虑到了电网络设计中所有元件参数的不确定性，每个元件的参数真值都被包含在区间数值中，利用区间算法得到的结果，将涵盖由于网络元件参数变化而影响网络性能的所有可能情况。所以，与传统算法相比，区间算法可以更直观地反映出当网络元件参数发生变化时，相应某一网络函数的变化范围。这为设计者提供了更多的信息。另外，在区间计算的过程中，也同时完成了网络的灵敏度分析。实例证明了该算法的快捷性、有效性和可行性。

简介：摘要伴随着我国科技的不断发展，计算机网络技术越来越完善，智能ODN光分配技术是计算机技术发展的产物，这种技术具有稳定、高效、时效等优点，在光纤接入网络技术汇中，智能ODN技术被广泛使用，在实际使用过程中，ODN技术在管理上能够较为方便、监测更全面、拥有实时调度的功能。下文从ODN网络技术概论、智能ODN光网配电技术与传统ODN技术对比进行分析，并对智能ODN技术优点进行分析。

简介：从存储网络的技术发展角度出发，结合某信息系统的升级，介绍了一种基于光纤通道的存储网络的应用设计争实际使用方式。同时，对在此架构上应用的Oracle数据库IO性能进行了分析与评测。测试证明，其10性能提升明显，对系统信息存储的扩客具有参考意义。

简介：摘要我国的电子计算机技术、网络技术运用范围逐渐增加，其中VLAN技术也在研究与实践中不断发展。由于网络工程中对VLAN技术的应用需求较多，考虑到局域网建设也需要有关技术工作人员掌握VLAN技术，对此本文将探究VLAN技术应用实际，以期给有关技术工作人员带来借鉴参考。

简介：随着网络技术的不断发展，现有网络封闭式体系结构已严重制约了网络创新。鉴于此，软件定义网络（SDN）技术将网络体系垂直解耦，并开放了控制层及其协议。阐述了SDN技术概念及体系架构，分析了SDN技术特点和关键技术，最后提出了构建新型数据中心系统的设想。

简介：1、BER（GSM）和FER（CDMA）的评估1．1基本概念图1所示是GSM和CDMA前向业务信道发送端处理过程。接收处理是发送处理的逆过程，这里不再画出。

简介：针对目前军民航空管自动化系统中的网络监视和网络数据分析能力比较薄弱的现状，通过采用网络嗅探技术，提出了独立于系统之外的第三方网络监视设备的设计构想，力求通过引入更加全面的网络监视手段，提升空管技术维护人员对系统的维护能力和掌控能力。