2023年全國碩士研究生考試考研英語一試題真題（含答案詳解+作文范文）_第1頁
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1、TheJavaRingYingqi.LeeGuangxiNmalUniversityChinayingqi.lee@Abstract—AJavaRingisafingerringthatcontainsasmallmicroprocesswithbuiltincapabilitiesftheuserastofsmartcardthatiswearableonafinger.TheJavaRing’shisticalbackground.

2、TheJavaRingcanbeawearableComputerkeepyourmoneysafe.Keywds—JavaRinghistybackgroundeffectfunction.Ⅰ.WHATISTHEJAVARINGAJavaRingisafingerringthatcontainsasmallmicroprocesswithbuiltincapabilitiesftheuserastofsmartcardthatiswe

3、arableonafinger.SunMicrosystemsJavaRingwasintroducedattheirJavaOneConferencein1998insteadofagemstonecontainedaninexpensivemicroprocessinastainlesssteeliButtonrunningaJavaVirtualMachinepreloadedwithapplets(littleapplicati

4、onprograms).TheringswerebuiltbyDallasSemiconduct.TheJavaRingisanextremelysecureJavapoweredelectronictokenwithacontinuouslyrunningunalterablerealtimeclockruggedpackagingsuitablefmanyapplications.ThejeweloftheJavaRingisthe

5、JavaRingiButton–a16mmonemilliontransistsinglechiptrustedmicrocomputerwithaJavavirtualmachine(JVM)housedinaruggedsecurestainlesssteelcase.DesignedtobefullycompatiblewiththeJavaCard2.0stardtheprocessfeaturesahigh–speed1024

6、bitmodularexponentiatfRSAencryptionlargeRAMROMmemycapacityanunalterablerealtimeclock.ThepackagedmodulehasonlyasingleelectricalcontactagroundreturnconfmingtothespecificationsoftheDallasSemiconduct1Wirebus.Lithiumbackednon

7、volatileSRAMoffershighreadwritespeedunparalleledtamperresistancethroughnearinstantaneousclearingofallmemywhentemperingisdetectedafeatureknownasrapidzeroization.Dataintegrityclockfunctionaremaintainedfmethan10years.The16m

8、illimeterdiameterstainlesssteelenclosureaccommodatesthelargerchipsizesneededfupto128kilobytesofhighspeednonvolatilestaticRAM.Thesmallruggedpackagingofthemoduleallowsittoattachtovariousaccessies.(Thisispartofmyintroductio

9、n)Wkstationsattheconferencehad“ringreaders“installedonthemthatdownloadedinfmation1.JavaRingⅢ.AWEARABLECOMPUTERTheJavaRingisatinywearablecomputerwith6kilobytesofRAM.SixKmaynotsoundlikemuchbutitis20percentmememythanthefirs

10、tcomputerIeverused(backinhighschoolin1973):anancient(evenatthetime)DanishsecondgenerationcomputercalledGier.TheGiertookupanentireroomnowIcancarrymecomputerpoweronmyfinger.Even6Kisenoughtoholdyoursecretcodesyourcreditcard

11、snumbersyourdriverlicenseotherwalletcontentsevensomeelectroniccash.TheringcanalsosteafewimptantURLs.IndeedoneofthecurrentJavaRingdemosistheabilityfmetowalkuptoanycomputerinthewldthathasaJavaRingreaderhavemyhomepageloaded

12、simplybytouchingtheringtothereader.(Thisispartofmyintroduction)ThecurrentJavaRingisadmittedlymainlyademothoughitdoesperfmusefultaskssuchasopeninglockeddosfauthizedpersonnel.Inthefutureitwillobviouslybepossibletobuildring

13、swithmuchmememythan6Kmanymeapplicationswillbeimplemented.Fromauserinterfaceperspectiveonecanalsohopethatfutureringswillbedesignedbyjewelrydesignerslooklessnerdy.Alsoitwouldbepossibletogainthesamefunctionalityinawatchabel

14、tbuckle.Thekeyissueaboutawearablecomputerisnotwhetheritisaringanotherfmfact:thedecidingpointisthatyouwillalwayshaveitwithyou.Manyaspectsofcomputingchangeoncethereisnoneedtogotoaspecialroomtogetatthecomputer.Ⅳ.KEEPINGYOUR

15、MONEYSAFETheCryptoiButtonhardwareplatfmoffersauniquesetofspecialfeaturesexpresslydesignedtopreventprivatekeysotherconfidentialinfmationfrombecomingavailabletohackers.Figure1showsadetailoftheinternalconstructionoftheCrypt

16、oiButton.ThesilicondiecontainingtheprocessROMNVRAMmemyismetallurgicallybondedtothebarriersubstratethroughwhichallelectricalcontactsaremade.Thisbarriersubstratethetriplelayermetalconstructiontechniquesemployedinthesilicon

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