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：在一个组织内部，人们最害怕看到的往往是分裂、矛盾和无序。其实，这些都不应该被解读为组织行将毁灭的征兆，相反，它们是唤醒组织创新的必要条件——

简介：一个光标签的标签扑灭比率和分散赔偿正在交换传播系统优化，它采用40-Gb/s回来到调音的零微分阶段移动(RZ-DPSK)用622-Mb/s振幅移动调音标记的收费载重(问)控制数据。在我们的计划，收费载重和标签的接收装置敏感分别地完成-27.8dBm和-33.5dBm。在在40km上播送了以后，60km和80km挑选模式纤维(SMF)(与分散赔偿)分别地，收费载重能没有力量惩罚被恢复，当标签能与不到2dB惩罚被恢复时。

简介：摘要本文系统的分析了档案价值的现状，档案创造价值的方面，同时从做好记录做好宣传，做好档案前期工作，提高社会的档案价值意识，提高档案人员的水平等方面阐述了档案如何深度创造价值。

简介：<正>IT业的概念总是更迭得很快,云计算还没有被完全消化,大数据又高调登场。相比对云计算认知的莫衷一是,业界对大数据的理解则要清晰透彻很多。今年的IT领袖峰会"大数据时代"分论坛上,宽带资本董事长田溯宁抛出了一个耐人寻味的问题一大数据能不能称之为时代?田溯宁的原话大概是这样的:"时代这个词不是随便用的。历史上有电气化时代、工业时代,时代到来以后我们的生活方式、生产方式、行业形态都会发生根本性的变化,那大数据能不能称得上时代?"

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简介：是否你的员工总是在抱怨工作缺乏动力？是否你的定单老是无故飞走？也许，你该好好考虑一下改进公司给人带来的视觉感受。经济学家的最新研究表明，雇佣更多的俊男和靓女，可能会让你的公司业绩，像“神州5号”一样，一飞冲天。

简介：摘要无为民歌是流传于安徽省无为县境内群众中的民歌形式。有号子、山歌、小调等类别，品种齐全，数量繁多。《无为民歌》存世近150首，其中52首入编《安徽民间音乐》，38首编入《中国民间歌曲集成》安徽卷。2008年12月4日被列入安徽省第二批省级非物质文化遗产名录。本文主要探究无为民歌的文化价值，旨在传承和发扬中国传统音乐。

简介：经过产品竞争和终端渠道竞争之后，国内的PC厂商已经基本形成了固定的竞争格局，然而，在市场成熟阶段，PC厂商的竞争将基于价值链各个环节累加的正值，后来者还有改变游戏规则的机会。

简介：<正>软银中国资本合伙人华平接受本刊专访,解析关于医疗器械、医疗服务以及生物制药行业投资的理念与实践随着中国经济发展、国民生活水平的提高,医疗健康支出已成为继食品、教育之后的第三大消费支出。医疗健康产业也逐渐成为风险投资关注的新金矿。另外,值得关注的是,早在2006年,IT行业投资环境优势逐渐减弱,而医疗健康行业恰有强烈的资本需求,这也让风投资金逐渐向医疗健康等更具投资价值的产业转移。在这轮新的投资大潮中,部分风投机构更早嗅到了这一商机,老牌VC——软银中国资本就是其中之一。从