I-LTE isniffer isixhobo esinokuthi sibambe itrafikhi ye-LTE nje
Zimbalwa iintsuku ezidlulileyo, baphandi ukusuka Korea Institute of Advanced Technology ubhengeze ukukhutshwa kwesixhobo esibizwa ngokuba yi “LTESniffer” engumthombo ovulekileyo kwaye ivumela abasebenzisi ukuba babeke iliso kwinethiwekhi ye-LTE kwaye bahlalutye i-traffic. I-LTESniffer i yenzelwe ukusebenza ngezixhobo ezahlukeneyo ze-LTE, kubandakanywa ii-smartphones, iipilisi, kunye neemodem, kwaye zingasetyenziselwa ukubamba kunye nokuhlalutya idatha ehanjiswe kwiinethiwekhi ze-LTE.
I-LTE (i-Long-Term Evolution) ngumgangatho wonxibelelwano olungenacingo olubanzi olusetyenziswa kakhulu kuthungelwano oluphathwayo kwihlabathi jikelele. Uthungelwano lwe-LTE luyilelwe ukubonelela ngokukhawuleza nangokuthembekileyo ukudluliselwa kwedatha, kodwa abakhuselekanga kwiingozi zokhuseleko.
Enye yezona ngozi zibalulekileyo zokhuseleko ezinxulumene nothungelwano lwe-LTE kukuvava. Ukuvalelwa kwe-LTE kubhekiselele ekucaluleni nasekuhlalutyweni kwedatha egqithiswe kuthungelwano lwe-LTE ngaphandle kolwazi okanye imvume yamaqela abandakanyekayo.
Malunga LTESniffer
I-LTESniffer, ikuvumela ukuba ulungelelanise ngokungenzi nto (ngaphandle kokuthumela imiqondiso emoyeni) ukuphulaphula kunye nokuthintela i-traffic phakathi kwesikhululo esisisiseko kunye neselfowuni kwiinethiwekhi ze-4G LTE, kunye nokubonelela ngezinto eziluncedo zokucwangcisa i-traffic interception kunye nokuphunyezwa kwe-API ekusebenziseni ukusebenza kwe-LTESniffer kwizicelo zomntu wesithathu.
Enye yeempawu ltesniffer isitshixo kukukwazi kwayo ukubamba kunye nokucacisa imiyalezo ye-LTE yenqwelomoya. Izixhobo ze-LTE zisebenzisa le miyalezo ukuseka nokugcina unxibelelwano kwinethiwekhi kwaye iqulethe ulwazi olubalulekileyo malunga nesixhobo kunye nenethiwekhi. Ngokubamba kunye nokuhlalutya le miyalezo, i-LTESniffer inokubonelela ngolwazi oluxabisekileyo malunga nokusebenza kweenethiwekhi ze-LTE kunye nokuziphatha kwezixhobo ze-LTE.
I-LTESniffer ibonelela nge-decoding ye-PDCCH yetshaneli ebonakalayo (Physical Downlink Control Channel) ngenxa fumana ulwazi malunga nesiseko setrafikhi yesitishi (i-DCI, iNkcukacha yokuLawula i-Downlink) kunye nezazisi zenethiwekhi zexeshana (i-RNTI, i-Radio Network Temporary Identifier).
Inkcazo ye-DCI kunye ne-RNTI iphinde ivumele i-decoding data kwi-PDSCH (i-Physical Downlink Shared Channel) kunye ne-PUSCH (i-Physical Uplink Shared Channel) iziteshi zokufumana ukufikelela kwi-traffic engenayo nephumayo. Kwangaxeshanye, i-LTESniffer ayikhiphi imiyalezo efihliweyo edluliselwe phakathi kwefowuni ephathwayo kunye nesitishi esisisiseko, kodwa ibonelela ngokufikelela kuphela kulwazi oludluliselwe kumbhalo ocacileyo. Ngokomzekelo, imiyalezo ethunyelwe sisikhululo sesiseko kwimodi yokusasazwa kunye nemiyalezo yokuqala yoxhumo ihanjiswa ngaphandle kwe-encryption, ikuvumela ukuba uqokelele ulwazi malunga nokuba yeyiphi inombolo.
Ku Iimpawu ezibalaseleyo kwi-LTESniffer, oku kulandelayo kuchaziwe:
- Ukwenziwa kweekhowudi ngexesha lokwenyani kwamajelo olawulo e-LTE aphumayo nangenayo
- Inkxaso ye-LTE Advanced (4G) kunye ne-LTE Advanced Pro (5G, 256-QAM) iinkcukacha.
- Inkxaso yefomathi ye-DCI
- Inkxaso yeendlela zokudlulisa idatha: 1, 2, 3, 4.
- Inkxaso yezahlulo zolwahlulo lwe-frequency duplex (FDD) amajelo.
- Inkxaso yezikhululo ezisisiseko ezisebenzisa iifrikhwensi ukuya kuthi ga kwi-20 MHz.
- Ukufunyanwa ngokuzenzekelayo kwezicwangciso zokumodareyitha ezisetyenziselwa idatha engenayo nephumayo (16QAM, 64QAM, 256QAM).
- Ukufunyanwa ngokuzenzekelayo koqwalaselo lomaleko womzimba kwifowuni nganye.
- Inkxaso ye-LTE yokhuseleko lwe-API: Imephu ye-RNTI-TMSI, iqoqo le-IMSI, iprofayili.
Ukungenelela kufuna izixhobo ezongezelelweyo. Ukuthintela i-traffic ukusuka kwisikhululo esisisiseko sodwa, i-USRP B210 i-transceiver programmable (SDR) ene-antenna ezimbini yanele, ixabisa malunga ne-$ 2000.
Ikhadi elibiza kakhulu le-USRP X310 SDR liyafuneka ukuba lithintele i-traffic ukusuka kwifowuni ephathwayo ukuya kwisikhululo sesiseko kunye nee-transceivers ezimbini ezongezelelweyo (ikhithi ixabisa malunga ne-11,000 yeedola), ekubeni ukubonwa kwepakethi ethunyelwa ngeefowuni kufuna ulungelelwaniso lwexesha elichanekileyo phakathi kwezakhelo ezithunyelwe kwaye zifunyenwe kwaye ukwamkelwa ngaxeshanye kwemiqondiso kwiibhendi ezimbini ezahlukeneyo zamaza.
Ikhompyutheni enamandla ngokwaneleyo ukucacisa iprotocol nayo iyafuneka, umzekelo, ukuhlalutya i-traffic kwisikhululo esisisiseko esinabasebenzisi abasebenzayo be-150, inkqubo ye-Intel i7 CPU kunye ne-16 GB ye-RAM iyacetyiswa.
I-LTESniffer iyakwazi ukwenziwa ngokwezifiso kakhulu. kwaye inokwakheka ukuba ibambe iintlobo ezithile zetrafikhi okanye isihluzo setrafikhi esingafunwayo. Oku kuyenza ibe sisixhobo esinamandla kubalawuli benethiwekhi, abaphandi bokhuseleko, kunye nabani na ongomnye ofuna ukubeka esweni uthungelwano lwe-LTE kunye nokuhlalutya i-traffic. Kwicandelo elilandelayo, siza kuxubusha indlela yokusebenzisa i-LTESniffer ukubeka iliso kwinethiwekhi ye-LTE kunye nokuhlalutya i-traffic.
Ukuba unomdla wokufunda ngakumbi ngayo, ungabonisana kunye/okanye ufumane ikhowudi yesixhobo kuyo eli khonkco lilandelayo.
Okokugqibela, kufuneka kukhankanywe oko Ukuphulaphula nge-LTE kunokusetyenziselwa iinjongo ezahlukeneyo, zombini ezisemthethweni nezingekho mthethweni, ngoko ke ukusetyenziswa kwesixhobo kuxhomekeke kumsebenzisi kunye nemithetho yelizwe labo.