?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=MarcoPolo%3A+A+Zero-Permission+Attack+for+Location+Type+Inference+from+the+Magnetic+Field+Using+Mobile+Devices&rft.creator=Perez%2C+Beatrice&rft.creator=Mehrotra%2C+Abhinav&rft.creator=Musolesi%2C+Mirco&rft.description=Location+information+extracted+from+mobile+devices+has+been+largely+exploited+to+reveal+our+routines%2C+significant+places%2C+and+interests%2C+just+to+name+a+few.+Given+the+sensitivity+of+the+information+it+reveals%2C+location+access+is+protected+by+mobile+operating+systems+and+users+have+control+over+which+applications+can+access+it.+We+argue+that+applications+can+still+infer+the+coarse-grain+location+information+by+using+alternative+sensors+that+are+available+in+off-the-shelf+mobile+devices+that+do+not+require+any+permissions+from+the+users.%0D%0A%0D%0AIn+this+paper+we+present+a+zero-permission+attack+based+on+the+use+of+the+in-built+magnetometer%2C+considering+a+variety+of+methods+for+identifying+location-types+from+their+magnetic+signature.+We+implement+the+proposed+approach+by+using+four+different+techniques+for+time-series+classification.+In+order+to+evaluate+the+approach%2C+we+conduct+an+in-the-wild+study+to+collect+a+dataset+of+nearly+70+h+of+magnetometer+readings+with+six+different+phones+at+66+locations%2C+each+accompanied+by+a+label+that+classifies+it+as+belonging+to+one+of+six+selected+categories.+Finally%2C+using+this+dataset%2C+we+quantify+the+performance+of+all+models+based+on+two+evaluation+criteria%3A+(i)+leave-a-place-out+(using+the+test+data+collected+from+an+unknown+place)%2C+and+(ii)+leave-a-device-out+(using+the+test+data+collected+from+an+unknown+device)+showing+that+we+are+able+to+achieve+40.5%25+and+39.5%25+accuracy+in+classifying+the+location-type+for+each+evaluation+criteria+respectively+against+a+random+baseline+of+approximately+16.7%25+for+both+of+them.&rft.publisher=Springer&rft.contributor=Kohlweiss%2C+Markulf&rft.contributor=Di+Pietro%2C+Roberto&rft.contributor=Beresford%2C+Alastair&rft.date=2024-09-29&rft.type=Proceedings+paper&rft.language=eng&rft.source=+++++In%3A+Kohlweiss%2C+Markulf+and+Di+Pietro%2C+Roberto+and+Beresford%2C+Alastair%2C+(eds.)+Cryptology+and+Network+Security%3A+23rd+International+Conference%2C+CANS+2024%2C+Cambridge%2C+UK%2C+September+24%E2%80%9327%2C+2024%2C+Proceedings%2C+Part+II.++(pp.+pp.+3-24).++Springer%3A+Singapore.+(2024)+++++&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F10194561%2F