Masu bincike daga Jami'ar Ben-Gurion, nazarin hanyoyin ɓoye na watsa bayanai daga keɓaɓɓun kwamfutoci, sun ɓullo da wata sabuwar hanya kungiyar tashar sadarwa ake kira «AIR-FI», wanda ke ba da damar, mediante magudi na kwakwalwan kwakwalwar DDR, haifar da siginar rediyo a mita 2.4 GHz, wanda za'a iya kama shi ta hanyar a Na'urar kunna Wi-Fi mita da yawa daga nesa.
Daga ra'ayi mai amfani, ana iya amfani da hanyar don canja wurin mabuɗan ɓoye, kalmomin shiga, da bayanan sirri daga kwamfutar da ba ta da haɗin hanyar sadarwa kuma ta kamu da leken asiri ko malware.
Game da AIR-FI
Masu binciken gudanar don cimma canjin canjin na 100 ragowa a kowane dakika sanya masu karɓa Wi-Fi, kamar wayo ko kwamfutar tafi-da-gidanka, a nesa na cm 180. Halin kuskuren watsawa ya kasance 8,75%, amma an yi amfani da lambobin gyaran kuskure don ganowa da gyara kuskuren watsawa.
Don shirya tashar canja wurin bayanai, kawai fara aikin mai amfani na al'ada, cewa ana iya gudanar da shi a cikin na’urar kama-da-wane. Don liyafar, ana buƙatar na'urar da ke da guntu mara waya wacce za ta iya lura da iska mara ƙanƙanci (a cikin gwajin, adaftan mara waya ta hanyar amfani da kwakwalwan Atheros AR92xx da AR93xx tare da ingantaccen firmware wanda ke watsa bayanai game da sigogin siginar da suka dace da nazarin yanayi).
Lokacin samarda sigina, An yi amfani da damar ƙwaƙwalwar ajiya DDR4-2400 aiki a mita 2400 MHz don haifar da tsangwama na lantarki lokacin da mai sarrafawa ya sami damar samfurin ƙwaƙwalwar ajiya ta hanyar bas ɗin bayanai daban-daban.
Kewayon Wi-Fi ya faɗi a cikin mitocin 2.400-2.490 GHz, ma’ana, ya tsallake mitar da ƙwaƙwalwar take aiki.
Masu binciken sun gano cewa tare da cunkoson ababen hawa lokaci guda a kan bas na bayanai daban-daban, ana fitar da igiyar lantarki a mita 2,44 Ghz, wanda aka kama ta mara waya mara waya 802.11.
Tare da matakan ƙwaƙwalwar ajiya banda DDR4-2400, hanyar tana aiki yayin da aka sauya mitar ƙwaƙwalwar ajiyar a tsare, wanda aka ba da izini a cikin bayanin XMP (Extreme Memory Profile).
Don ƙirƙirar sigina, an yi amfani da samun damar bas zuwa lokaci ɗaya daga zaren aiwatar da layi daya ɗaure da ƙwayoyin CPU daban-daban. Bayanan sirri amfani a sigina ana aiwatar dashi ta amfani da yanayin gyaran OOK mafi sauki (kunnawa kan kashewa) tare da maɓallin sauyawa na amplitude (TAMBAYA), wanda a ciki an sanya "0" da "1" ta hanyar saita amintattun sigina daban-daban, kuma ana watsa bayanai a kan tsayayyen ƙima. - bitaya daga cikin isean daƙiƙa.
Canja wurin "1" yana yin jerin rubutattun abubuwan ƙwaƙwalwar da aka haifar ta hanyar kwafin 1 MB na bayanai tsakanin tsararru biyu. Lokacin aikawa da "0", algorithm baya ɗaukar wani mataki a lokacin da aka ware don watsa kaɗan. Sabili da haka, watsawar "1" yana haifar da fitowar sigina, kuma watsawar "0" siginar ta ɓace.
Daga cikin matakan shawo kan lamarin amfani da hanyar AIR-FI, an ambaci yanki na yankin tare da ƙirƙirar kewaye a cikin ƙungiyarn, a cikin abin da aka haramta ɗaukar kayan aiki tare da kwakwalwan mara waya, kazalika da sanya akwatin kwamfutar a cikin kejin Faraday, samar da amo akan mitar Wi-Fi, fara aiwatar da tsarin asasi wanda ake aiwatar da ayyukan ƙwaƙwalwar bazuwar da kuma lura da bayyanar a cikin tsarin abubuwan da ake zargi wanda ke aiwatar da ayyukan ƙwaƙwalwar ajiya mara kyau.
Har ila yau, a kan shafin masu bincike, an zaɓi zaɓi na hanyoyin watsawa na ɓoyayyun bayanan da suka gano ta amfani da sifofin electromagnetic, acoustic, thermal da light leakage:
- PowerHammer: Tsara aika bayanai akan layin wutan, yi amfani da kayan aiki a kan CPU don canza amfani da wuta ODINI: Zanga-zangar cire bayanai daga wata na'urar dake cikin garkuwar daki (Faraday cage) ta hanyar nazarin ƙananan ƙarfin magnetic oscillations da ke faruwa yayin aikin CPU.
- MAGNETO: hakar bayanai dangane da ma'aunin canjin yanayin magnetic da ke faruwa yayin aikin CPU.
- AirHopper: canja wurin bayanai a matakin da ya kai bytes 60 a dakika ɗaya daga PC zuwa wayoyin komai da komai ta hanyar bincike a kan wayoyin hannu tare da mai gyara FM na katsalandan rediyo da ke faruwa yayin da aka nuna bayanai akan allon.
- BitWhisper - Canja wurin bayanai sama da nisan 40cm a ƙimar ragowa 1-8 a kowace awa ta hanyar auna canje-canje a cikin yanayin zafin PC ɗin.
- GSMem: hakar bayanai daga nesa har zuwa mita 30 ta hanyar ƙirƙirar katsalandan na lantarki a kan yawan hanyoyin sadarwar GSM da wayar hannu ta kama.
Source: https://cyber.bgu.ac.il