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簡(jiǎn)介：SEEDISCUSSIONS,STATS,ANDAUTHORPROFILESFORTHISPUBLICATIONATHTTPS//WWWRESEARCHGATENET/PUBLICATION/318412307ANDROIDSECURITYISSUESANDSOLUTIONSCONFERENCEPAPERFEBRUARY2017DOI101109/ICIMIA20177975551CITATIONS5READS1,9452AUTHORSSOMEOFTHEAUTHORSOFTHISPUBLICATIONAREALSOWORKINGONTHESERELATEDPROJECTSRESEARCHVIEWPROJECTIOTRESEARCHPROJECTVIEWPROJECTKARTHICKSOWNDARAJANCHRISTUNIVERSITY,BANGALORE5PUBLICATIONS8CITATIONSSEEPROFILESUMITRABINUCHRISTUNIVERSITY,BANGALORE10PUBLICATIONS18CITATIONSSEEPROFILEALLCONTENTFOLLOWINGTHISPAGEWASUPLOADEDBYKARTHICKSOWNDARAJANON06AUGUST2017THEUSERHASREQUESTEDENHANCEMENTOFTHEDOWNLOADEDFILETHESAMEUSERIDSHAREDUSERID,THENITISPOSSIBLEFORAPPLICATIONATOUSETHEPERMISSIONSGRANTEDTOITSELFANDTHEPERMISSIONSGRANTEDTOBSIMILARLY,ITISPOSSIBLEFORAPPLICATIONBTOUSETHEPERMISSIONSGRANTEDTOITSELFANDTHEPERMISSIONSGRANTEDTOAEVERYANDROIDAPPLICATIONHASUNIQUEIDTHATISITSPACKAGENAMEANDROIDSUPPORTSSHAREDUSERIDITISANATTRIBUTEINANDROIDMANIFESTXMLFILEIFTHISATTRIBUTEASSIGNEDWITHTHESAMEVALUEINTWOORMOREAPPLICATIONSANDIFTHESAMECERTIFICATESIGNSTHESEAPPLICATIONSTHEYCANACCESSPERMISSIONSGRANTEDTOEACHOTHERCOLLISIONATTACKHASBEENCLASSIFIEDASDIRECTCOLLISIONATTACKANDINDIRECTCOLLISIONATTACKADIRECTCOLLISIONATTACKISWHEREINAPPLICATIONCOMMUNICATESDIRECTLYININDIRECTCOLLISIONATTACKAPPLICATIONCOMMUNICATESVIATHIRDPARTYAPPLICATIONORCOMPONENTCTIMEOFCHECKANDTIMEOFUSEATTACKTHEMAINREASONFORTOCTOUATTACKISNAMINGCOLLISIONNONAMINGRULEORCONSTRAINTISAPPLIEDTOANEWPERMISSIONDECLARATIONMOREOVER,PERMISSIONSINANDROIDAREREPRESENTEDASSTRINGS,ANDANYTWOPERMISSIONSWITHTHESAMENAMESTRINGARETREATEDASEQUIVALENTEVENIFTHEYBELONGTOSEPARATEAPPLICATIONSDSPYWARESPYWAREISATYPEOFMALWAREITISANAPKFILEWHICHISDOWNLOADEDAUTOMATICALLYWHENTHEUSERVISITSMALICIOUSWEBSITEANDAPPSINSTALLEDFROMUNKNOWNSOURCESINANDROID,OTHERTHANGOOGLEPLAYSTORE,ITISPOSSIBLETOINSTALLTHEAPPLICATIONSFROMUNKNOWNSOURCESSPYWAREISONEOFTHEMAINREASONSFORMAJORSECURITYTHREATSINANDROIDOPERATINGSYSTEMIIIUNDERSTANDINGPERMISSIONSTHEANDROIDOPERATINGSYSTEMUSESTHEPERMISSIONBASEDMODELTOACCESSVARIOUSRESOURCESANDINFORMATIONTHESEPERMISSIONSARENOTREQUESTSTHEYAREDECLARATIONSTHESEPERMISSIONSAREDECLAREDINANDROIDMANIFESTXMLFILEONCETHEPERMISSIONSAREGRANTED,THEPERMISSIONSREMAINSTATICFORANDROIDVERSIONSLESSTHAN689BUT,INANDROIDVERSIONS,70ANDHIGHERTHEAPPPERMISSIONSARECLASSIFIEDINTONORMALPERMISSIONS10ANDDANGEROUSPERMISSIONS11ANORMALPERMISSIONSNORMALPERMISSIONSDONTSPECIFICALLYHAZARDTHECLIENTSPRIVACYNORMALPERMISSIONSNEEDNOTBEDECLAREDINTHEANDROIDMANIFESTXMLFILETHESEPERMISSIONSAREGRANTEDAUTOMATICALLYEXAMPLEKILL_BACKGROUND_PROCESSESSET_WALLPAPERUNINSTALL_SHORTCUTWRITE_SYNC_SETTINGSBDANGEROUSPERMISSIONSDANGEROUSPERMISSIONSCANACCESSCRITICALRESOURCESOFTHEMOBILEDANGEROUSPERMISSIONSCANGIVETHEAPPACCESSTOTHEUSERSCONFIDENTIALDATAIFAPPLISTSANORMALPERMISSIONINITSMANIFEST,THESYSTEMGRANTSTHEPERMISSIONAUTOMATICALLYIFAPPLISTADANGEROUSPERMISSION,THEUSERHASTOEXPLICITLYGIVEAPPROVALFORTHEAPPFORTHESUCCESSFULINSTALLATIONOFTHEAPPEXAMPLECONTACTSREAD_CONTACTS,WRITE_CONTACTS,GET_ACCOUNTSLOCATIONACCESS_FINE_LOCATION,ACCESS_COARSE_LOCATIONSMSSEND_SMS,RECEIVE_SMS,READ_SMS,RECEIVE_WAP_PUSH,RECEIVE_MMSSTORAGEREAD_EXTERNAL_STORAGE,WRITE_EXTERNAL_STORAGEANDROIDMARSHMALLOW60HASCLASSIFIEDTHEPERMISSIONSINTONORMALANDDANGEROUSPERMISSIONSWHENEVERTHEAPPNEEDSTOUSEDANGEROUSPERMISSIONS,ITEXPLICITLYASKSTHEUSERTOCONFIRMWITHTHEPERMISSIONTHUS,ANDROID60ANDHIGHERVERSIONSPROVIDEEXPLICITPERMISSIONNOTIFICATIONTOACCESSCRITICALRESOURCESBUT,MARSHMALLOWISAVAILABLEONLYON12PERCENTOFANDROIDDEVICES9THEANDROIDOPERATINGSYSTEMUPDATESARENOTAVAILABLEFORMOSTOFTHEOLDERDEVICESTHEREFORE,SECURITYTHREATSRELATEDTOAPPPERMISSIONSARESTILLNOTSOLVEDCAPPLICATIONSANDBOXINGANDROIDUSESAPPLICATIONSANDBOXINGWHICHISUSEDTOLIMITTHEAPPLICATIONTOACCESSTHERESOURCESIFANAPPNEEDSTOACCESSTHERESOURCESOUTSIDEOFITSSANDBOX,ITNEEDSTOREQUESTTHEAPPROPRIATEPERMISSIONDOVERCLAIMINGOFAPPLICATIONPERMISSIONSTHEPERMISSIONSWHICHMAYNOTBEREQUIREDFORTHEAPP,BUTTHEAPPLICATIONREQUESTFORTHEPARTICULARPERMISSION,THISISCALLEDOVERCLAIMINGOFPERMISSIONSITISTHEDECLARATIONTOUSEIRRELEVANTPERMISSIONSTHATARENOTATALLREQUIREDFORTHEAPPLICATIONITISTHEMAINREASONFORDATATHEFTINANDROIDAPPLICATIONTHEINFORMATIONISCOLLECTEDANDSENTTOTHECONCERNEDPEOPLETHEDEVELOPER’SOFTHEAPPMAKESMONEYBYSELLINGTHISINFORMATIONSEVERALINTERNATIONALCONFERENCEONINNOVATIVEMECHANISMSFORINDUSTRYAPPLICATIONSICIMIA20179781509059607/17/3100?2017IEEE687

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