简介：

简介：Inthispaper,weputforwardaweakblindquantumsignatureschemebasedonquantumentanglementswappingofBellstates.Differentfromtheexistingquantumsignatureschemes,ourschemecanoffertwo-stepverificationsecurityservicestoensurethevalidityoftheverification.Inordertoguaranteetheunconditionalsecurityofthescheme,thequantumkeydistributionprotocolandone-timepadencryptionalgorithmareemployedinourscheme.Besides,theentanglementswappingofBellstatesmechanismenhancesthesecurityofverificationcriteria.Theproposedschemehasthepropertiesofnonforgeability,nonrepudiation,lindness,andtraceability.

简介：我们建议由使用三粒子的GHZ的安全通讯协议说的量。在这个协议，我们利用重排的订单和顺序传播的想法。发送者发送消息，艾莉斯，首先在一个起始的序列扰乱粒子订单，然后送到消息的接收装置的扰乱的订单的顺序，鲍勃。在艾莉斯的介绍下面，鲍勃重排顺序回到起始的顺序。由接着在每三个粒子上做GHZ州的大小，鲍勃能达到艾莉斯的秘密消息。另外，我们仍然计算我们的三粒子的GHZ协议的效率并且用多粒子GHZ状态概括它到盒子。

简介：

简介：Recently,Liuetal.[Commun.Theor.Phys.57(2012)583]proposedaquantumprivatecomparisonprotocolbasedonentanglementswappingofBellstates,whichaimstosecurelycomparetheequalityoftwoparticipants’informationwiththehelpofasemi-honestthirdparty(TP).However,thepresentstudypointsoutthereisafatalloopholeinLiuetal.’sprotocol,andTPcanmakeBell-basismeasurementtoknowalltheparticipants’secretinputswithoutbeingdetected.Tofixtheproblem,asimplesolution,whichusesone-timeeavesdroppercheckingwithdecoyphotonsinsteadoftwiceeavesdroppercheckingwithBellstates,isdemonstrated.Comparedwiththeoriginalprotocol,itnotonlyreducestheBellstatesconsumptionbutalsosimplifiestheprotocolsteps.

简介：TheInternetevolvestoincorporatevery-high-bandwidthopticallinksandmorelarge-delaysatellitelinks.TCPfacesnewchallengesinthisuniqueenvironment.TheoryandexperimentsshowedthatTCPbecomesinefficientandispronetobeunstableastheper-flowproductofbandwidthandlatencyincreases,regardlessofthequeuingscheme.Variable-structurecongestionControlProtocol(VCP)isproposedtoaddresstheseproblems.However,VCPhasproblemintermsofconvergencetime,i.e.,ittakesalongtimeforanewVCPflowtoachievefairbandwidthallocationiftheexistingVCPflowshavelargecon-gestionwindows.ThispaperproposedanExtendedVariable-structurecongestionControlProtocol(EVCP),whichadoptedaconvergencecontroller.Thebasicideaofconvergencecontrolleristhatifaflowhaslargerwindowthanitsfairwindow,itscongestionwindowshouldbedecreasedmoreaggressivelythanusualinMultiplicativeDecrease(MD)phase.SimulationsshowedthatEVCPhasbetterperformanceintermsofconvergencetimewhilekeepingtheadvantagesofVCP.