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1、附录AOvercomesecurityissuesinembeddedsystemsByGaryDrosselEmbeddedSystemsDesign(06/12/07,12:15:00HEDT)Traditionalsecuritytechniquesmaynotsufficeanymore.Embeddedsystemsaregettingmorecomplexandhackersaregettingsmarter.Embeddedsystemstraditionallyhavehadver
2、ylimitedsecurityoptions.Indeed,fittingarobustsetofsecurityfeaturesintosuchasmallmechanicalfootprintcanbechallenging.Storagecomponents,processingpower,batterylife,time-to-market,andoverallcostconcernshavepreventedmostsecurityfeaturesfrombeingimplemente
3、d.Overcomingthesedesignchallengeshasbecomecrucialtoembeddedsystemsdesignersinlightofthegrowingthreatofsecuritybreachesasmoresystemsaresharedorattachedtonetworksandnewregulationsareadoptedthatmakesecuritymandatory.Thesecurityindustryhasfocusedlargelyon
4、portablestoragedevicesfortheconsumerelectronicsindustry.Thebasicpremisehereisthatuserswantsecuritycapabilitiestotravelwiththedevice,suchaswithaUSBthumbdrive.Thisapproachletsusersprotecttheirdataonanysystem,whetherit'sonanofficeorhomePC,anInternetkiosk
5、,orapubliccomputer.Softwareapplicationsanddataarepassword-protectedusingindustry-definedsecurityprotocols,whichoftenaretargetedbyInternethackers.Portabledatadevicesarealsohighlysusceptibletotheft.Oncestolenandthesecurityencryptiondefeated,thefullyinta
6、ctdatacanbeaccessed,loadedontoaPCortheInternet,sold,orworse.Ontheotherhand,embeddedsystemsapplicationsfortheenterpriseOEMmarketfacetheirownuniquechallenges.TheseOEMs(originalequipmentmanufacturers)targetingthenetcom,military,industrial,interactivekios
7、k,andmedicalmarketstypicallyprovideinfrastructureequipmenttotheircustomersbysupplyingeverythingfromnetworkroutersandvotingmachinestomedicaldiagnosticequipmentanddatarecorders.Thekeyrequirementisthatdatamustberenderedunreadableshouldthestoragedevicesbe
8、removedfromthesystemsforwhichthey'reintended.ThehostsystemmustmaintainultimatecontroloversecurityalgorithmstoprotectthedataandpreventIPtheft.Securityrequirementscanvaryfortheseapplications.Theycanbeassimpleasensuringthatthecorrectstorageproduc
