Tawagar masu bincike daga Jami'ar California, San Diego, sun kirkiro wata hanya ta gano na'urorin hannu ta hanyar amfani da fitilun da aka aika ta iska ta hanyar amfani da Bluetooth Low Energy (BLE) da masu karɓar Bluetooth masu amfani don gano sabbin na'urori a cikin kewayon.
Dangane da aiwatarwa, ana aika siginar fitila tare da mitar kusan sau 500 a cikin minti ɗaya kuma, kamar yadda masu ƙirƙira ƙa'idar suka ɗauka, gaba ɗaya ba na mutumci ba ne kuma ba za a iya amfani da su don ɗaure ga mai amfani ba. A hakikanin gaskiya, lamarin ya zama daban kuma lokacin da aka aika, siginar yana karkatar da shi a ƙarƙashin rinjayar abubuwan da ke tasowa yayin samar da kowane guntu guda ɗaya. Ana iya gano waɗannan ɓarna, waɗanda ke na musamman kuma koyaushe ga kowace na'ura, ta amfani da daidaitattun masu sarrafa shirye-shirye (SDR, Rediyon Ma'anar Software).
Matsalar tana bayyana kanta a cikin kwakwalwan kwamfuta masu haɗaka waɗanda ke haɗa Wi-Fi da ayyukan Bluetooth, suna amfani da babban oscillator na gama gari da sauran kayan aikin analog da yawa, halayen wanda ke haifar da asymmetry a cikin lokaci da girma. An kiyasta kudin kayan aikin da za a kai harin ya kai kusan dala 200. Misalai na lamba don fitar da alamun musamman daga siginar da aka katse ana buga su akan GitHub.
A aikace, fasalin da aka gano yana ba da damar gano na'urar, ba tare da la'akari da amfani da matakan kariya na tantancewa kamar bazuwar adireshin MAC ba. Don iPhone, kewayon liyafar alamar ta isa ganowa ya kai mita 7, tare da aikace-aikacen gano lamba na COVID-19 yana aiki. Don na'urorin Android, ganowa yana buƙatar kusanci.
Don tabbatar da ingancin hanyar a aikace, an gudanar da gwaje-gwaje da yawa a wuraren jama'a irin su cafes. A lokacin gwaji na farko, an yi nazarin na'urori 162, waɗanda aka samar da abubuwan ganowa na musamman don 40%. A gwaji na biyu, an yi nazarin na'urorin wayar hannu guda 647, kuma an samar da na'urori na musamman ga kashi 47% na su. A ƙarshe, an nuna yiwuwar yin amfani da abubuwan ganowa da aka samar don bin diddigin motsi na na'urorin masu sa kai waɗanda suka amince su shiga cikin gwajin.
Masu binciken sun kuma lura da matsaloli da yawa waɗanda ke sa ganewa da wahala. Misali, canje-canjen zafin jiki ke shafar sigogin siginar fitila, kuma ba tazarar da aka karɓi tambarin ke shafar canjin ƙarfin siginar Bluetooth da ake amfani da shi akan wasu na'urori ba. Don toshe hanyar ganowa da ake tambaya, ana ba da shawarar tace siginar a matakin firmware na guntu ta Bluetooth ko amfani da hanyoyin kariya na kayan masarufi na musamman. Kashe Bluetooth ba koyaushe ya isa ba, yayin da wasu na'urori (misali, wayoyin hannu na Apple) ke ci gaba da aika tashoshi ko da a kashe Bluetooth kuma suna buƙatar kashe na'urar gabaɗaya don toshe aikawa.
source: budenet.ru