简介:AlinearizationattackontheKeyStreamGenerator(KSG)ofthemodifiedE0algorithmproposedbyHermelin[ProceedingsofICISC'99,SpringerLNCS1787,2000,17-29]isgiveninthispaper.TheinitialvaluecanberecoveredbyalinearizationattackwithO(260.52)operationsbysolvingaSystemofLinearEquations(SLE)withatmost220.538unknowns.FrederikArmknecht[CryptologyePrintArchive,2002/191]proposedalinearizationattackontheKSGofE0algorithmwith0(270.341)operationsbysolvinganSLEwithatmost224.056unknowns,sothemodificationproposedbyHermelinreducestheabilityofE0toresistthelinearizationattackbycomparingwiththeresultsofFrederikAnnknecht.
简介:Atomicityisnecessaryforreliableandsecureelectroniccommercetransactionandtoguaranteetheparticipants'interests.Anatomicandefficiente-cash(electroniccash)transactionprotocolbasedontheclassicale-cashschemeispresented.Thedeliveryofdigitalgoodsisincorporatedintotheprocessofpaymentintheprotocol.Apartfromensuringallthreelevelsofatomicity,thenovelprotocolfeatureshighefficiencyandpracticabilitywithunfavorablestrongassumptionremoved.Furthermore,theproposedprotocolprovidesnon-repudiationproofsforanyfuturedisputes.Atlast,analysisoftheatomicityandefficiencyisillustrated.
简介:Thestudyofcycliccodesoverringshasgeneratedalotofpublicinterest.Inthispaper,westudycycliccodesandtheirdualcodesovertheringZP2oflengthpe,andfindasetofgeneratorsforthesecodes.Theranksandminimalgeneratorsetsofthesecodesarestudiedaswell,whichplayanimportantroleindecodinganddeterminingthedistancedistributionofcodes.
简介:ThispaperconsiderstheBayesianandexpectedBayesian(E-Bayesian)estimationsoftheparameterandreliabilityfunctionforcompetingriskmodelfromGompertzdistributionunderType-Iprogressivelyhybridcensoringscheme(PHCS).TheestimationsareobtainedbasedonGammaconjugatepriorfortheparameterundersquarederror(SE)andLinexlossfunctions.Thesimulationresultsareprovidedforthecomparisonpurposeandonedatasetisanalyzed.
简介:Inthispaper,LyapunovfunctionmethodisusedtostudytherobustabsolutestabilityofgeneralintervalLur'etypenonlinearcontrolsystems.Asaresult,algebraicallysufficientconditionswithintervalmatrixinequalityformareobtainedforthegeneralintervalLur'etypenonlinearcontrolsystems,thustherelationshipbetweenthestabilityofsymmetricalintervalmatrixandtherobustabsolutestabilityofgeneralintervalLur'etypenonlinearcontrolsystemsisestablished.
简介:在Pro/E环境下,介绍了运用Pro/E面向层次结构的自顶向下的设计功能,从产品的结构层次入手,以骨架模型为传递载体,结合独立零件的参数关系完成可搬移机箱的三维模型设计。实践证明采用Pro/E自顶向下的设计方法提高了设计效率和设计的准确性并为以后的变形设计提供了方便。