Boka revatsvagiri kubva kumayunivhesiti mashanu eAmerica rakagadzira EarSpy side-channel yekurwisa nzira, iyo inoita kuti zvikwanise kuterera panhaurirano dzefoni nekuongorora ruzivo kubva kune zvinofamba sensors. Iyo nzira yakavakirwa pachokwadi chekuti mafoni emazuva ano ane accelerometer uye gyroscope, iyo inopindurawo kukudengenyeka kunokonzerwa neiyo low-power loudspeaker, iyo inoshandiswa pakutaurirana pasina speakerphone. Achishandisa nzira dzekudzidza muchina, muongorori akakwanisa kudzoreredza zvishoma kutaura kwakanzwika pachigadzirwa zvichibva paruzivo rwakagamuchirwa kubva kumasensa anofambisa uye kuona kuti murume kana mukadzi.
Pakutanga, zvaitendwa kuti kurwiswa kweparutivi-chiteshi kunosanganisira masensa ekufamba kwaigona kuitwa chete uchishandisa masipika ane simba anoshandiswa kufona-yemahara, uye masipika anonzwika kana nhare yaiswa panzeve haitungamiri pakudonha. Nekudaro, kuwedzera sensor senitivity uye kushandiswa kweakanyanya simba maviri-nzeve vatauri mumafoni emazuva ano akachinja mamiriro. Kurwiswa kwacho kunogona kuitwa mune chero nharembozha yepuratifomu yeAroid, sezvo kuwana mafambiro sensors kunopihwa kune zvikumbiro pasina mvumo yakakosha (kunze kweiyo Android 13).
Kushandiswa kweiyo convolutional neural network uye classical muchina kudzidza algorithms kwakaita kuti zvikwanise, pakuongorora spectrograms akagadzirwa zvichibva pane data kubva kune accelerometer pane OnePlus 7T smartphone, kuti uwane huchokwadi hwekutsunga kwevakadzi ve98.66%, kutsunga kwemutauri kwe92.6%, uye kutaura kwedijiti kutsunga kwe56.42%. Pane iyo OnePlus 9 smartphone, nhamba idzi dzaive 88.7%, 73.6% uye 41.6%, zvichiteerana. Kana iyo speakerphone yakavhurwa, kurongeka kwekuzivikanwa kwekutaura kwakawedzera kusvika 80%. Kurekodha data kubva kuaccelerometer, yakajairwa Physics Toolbox Sensor Suite mobile application yakashandiswa.
Kuti udzivirire kubva kurudzi urwu rwekurwisa, shanduko dzakatoitwa kune iyo Android 13 chikuva iyo inodzikamisa kurongeka kwedata kubva kuma sensors akapihwa pasina akakosha masimba kusvika ku200 Hz. Kana sampling pa200 Hz, kurongeka kwekurwisa kunoderedzwa kusvika 10%. Izvo zvakare zvinocherechedzwa kuti mukuwedzera kune simba uye nhamba yevatauri, iko kurongeka kunokonzerwawo zvakanyanya nekuswedera kwevatauri kune ma sensors ekufamba, kusimba kweimba uye kuvapo kwekupindira kwekunze kubva kunharaunda.
Source: opennet.ru