资源描述：
《a semantic context-aware access control framework》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、ASemanticContext-AwareAccessControlFrameworkforSecureCollaborationsinPervasiveComputingEnvironmentsAlessandraToninelli1,RebeccaMontanari1,LalanaKagal2,andOraLassila3,1DipartimentodiElettronica,InformaticaeSistemisticaUniversitàdiBolognaVialeRisorgimen
2、to,2-40136Bologna-Italy{atoninelli,rmontanari}@deis.unibo.it2MITCSAIL32VassarStreet,Cambridge,MA02139,USAlkagal@csail.mit.edu3NokiaResearchCenterCambridge3CambridgeCenter,Cambridge,MA02142,USAora.lassila@nokia.comAbstract.Wirelessconnectivityandwidesp
3、readdiffusionofportabledevicesoffernovelopportunitiesforuserstoshareresourcesanywhereandanytime,andtoformad-hoccoalitions.Resourceaccesscontroliscrucialtoleveragethesead-hoccollaborations.Inpervasivescenarios,however,collaboratingentitiescannotbeprede
4、terminedandresourceavailabilityfrequentlyvaries,evenunpredictably,duetouser/devicemobility,thuscomplicatingresourceaccesscontrol.Accesscontrolpoliciescannotbedefinedbasedonentity’sidentities/roles,asintraditionalaccesscontrolsolutions,orbespecifiedapr
5、ioritofaceanyoperativeruntimecondition,butrequirecontinuousadjustmentstoadapttothecurrentsituation.Toaddresstheseissues,thispaperadvocatestheadoptionofnovelaccesscontrolpolicymodelsthatfollowtwomaindesignguidelines:context-awarenesstocontrolresourceac
6、cessonthebasisofcontextvisibilityandtoenabledynamicadaptationofpoliciesdependingoncontextchanges,andsemantictechnologiesforcontext/policyspecificationtoallowhigh-leveldescriptionandreasoningaboutcontextandpolicies.Thepaperalsodescribesthedesignofasema
7、nticcontext-awarepolicymodelthatadoptsontologiesandrulestoexpresscontextandcontext-awareaccesscontrolpoliciesandsupportspolicyadaptation.1IntroductionTelecommunicationsystemsandtheInternetareconvergingtowardsanintegratedpervasivescenariothatpermitsuse
8、rstoaccessservicesanytimeandanywhereevenwhentheyareonthemove.Recenttechnologicaladvancesinbothcomputationalcapabilitiesandconnectivityofportabledevicesarealsoenablingmobileusersinphysicalproximityofeachothertoformad-hocnetworksforspontaneousco
