{"id":108534,"date":"2023-05-15T18:48:10","date_gmt":"2023-05-15T16:48:10","guid":{"rendered":"https:\/\/prohoster.info\/?p=108534"},"modified":"2023-05-16T18:21:42","modified_gmt":"2023-05-16T16:21:42","slug":"opublikovan-instrumentarij-ltesniffer-dlya-perehvata-trafika-v-setyah-4g-lte","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/opublikovan-instrumentarij-ltesniffer-dlya-perehvata-trafika-v-setyah-4g-lte","title":{"rendered":"A fost publicat toolkitul LTESniffer pentru interceptarea traficului \u00een re\u021belele 4G LTE","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Cercet\u0103torii de la Institutul Coreean de Tehnologii Avansate au publicat un instrument numit LTESniffer, care permite, \u00een mod pasiv (f\u0103r\u0103 a trimite semnale pe frecven\u021b\u0103), interceptarea \u0219i ascultarea traficului \u00eentre sta\u021bia de baz\u0103 \u0219i telefonul mobil \u00een re\u021belele 4G LTE. Instrumentul ofer\u0103 utilitare pentru interceptarea traficului \u0219i implementarea unei API pentru utilizarea func\u021bionalit\u0103\u021bilor LTESniffer \u00een aplica\u021bii externe.      <\/p>\n<p> LTESniffer asigur\u0103 decodificarea canalului fizic PDCCH (Physical Downlink Control Channel) pentru a ob\u021bine informa\u021bii despre traficul de la sta\u021bia de baz\u0103 (DCI, Downlink Control Information) \u0219i identificatorii temporari ai re\u021belei (RNTI, Radio Network Temporary Identifier). Definirea DCI \u0219i RNTI permite ulterior decodificarea datelor din canalele PDSCH (Physical Downlink Shared Channel) \u0219i PUSCH (Physical Uplink Shared Channel) pentru a ob\u021bine acces la traficul de intrare \u0219i ie\u0219ire. \u00cen acest context, LTESniffer nu se ocup\u0103 cu decriptarea mesajelor criptate transmise \u00eentre telefonul mobil \u0219i sta\u021bia de baz\u0103, ci ofer\u0103 acces doar la informa\u021biile transmise f\u0103r\u0103 criptare. De exemplu, mesajele trimise de sta\u021bia de baz\u0103 \u00een mod difuzare \u0219i mesajele ini\u021biale de conectare sunt transmise f\u0103r\u0103 criptare, ceea ce permite colectarea de informa\u021bii despre de la ce num\u0103r, c\u00e2nd \u0219i c\u0103tre ce num\u0103r au fost efectuate apelurile.      <\/p>\n<p>Pentru a organiza interceptarea, este necesar un echipament suplimentar. Pentru interceptarea traficului doar de la sta\u021bia de baz\u0103, este suficient un transceiver programabil (SDR) USRP B210 cu dou\u0103 antene, cu un cost de aproximativ 2000 $. Pentru a intercepta traficul de la telefonul mobil la sta\u021bia de baz\u0103, este necesar\u0103 o plac\u0103 SDR USRP X310 mai scump\u0103, cu dou\u0103 transceivere suplimentare (costul setului este de aproximativ 11000 $), deoarece pentru sniffing-ul pasiv al pachetelor trimise de telefoane este necesar\u0103 o sincronizare precis\u0103 a timpului \u00eentre cadrele trimise \u0219i primite \u0219i recep\u021bia simultan\u0103 a semnalelor pe dou\u0103 frecven\u021be diferite. De asemenea, pentru decodificarea protocolului este necesar un computer destul de puternic, de exemplu, pentru analiza traficului sta\u021biei de baz\u0103 cu 150 de utilizatori activi, este recomandat un sistem cu CPU Intel i7 \u0219i 16 GB RAM.      <\/p>\n<p>Func\u021bionalit\u0103\u021bile principale ale LTESniffer:  <\/p>\n<ul>\n<li class=\"l\"> Decodificarea \u00een timp real a canalelor de control de ie\u0219ire \u0219i de intrare LTE (PDCCH, PDSCH, PUSCH).\n<li class=\"l\"> Suport pentru specifica\u021biile LTE Advanced (4G) \u0219i LTE Advanced Pro (5G, 256-QAM).\n<li class=\"l\"> Suport pentru formatele DCI (Downlink Control Information): 0, 1A, 1, 1B, 1C, 2, 2A, 2B.\n<li class=\"l\"> Suport pentru modurile de transmitere a datelor: 1, 2, 3, 4.\n<li class=\"l\"> Suport pentru canalele duplex cu separare pe frecven\u021b\u0103 (FDD).\n<li class=\"l\"> Suport pentru sta\u021bii de baz\u0103 care folosesc o frecven\u021b\u0103 de p\u00e2n\u0103 la 20 MHz.\n<li class=\"l\"> Detectarea automat\u0103 a schemelor de modulare utilizate pentru datele de intrare \u0219i ie\u0219ire (16QAM, 64QAM, 256QAM).\n<li class=\"l\"> Determinarea automat\u0103 a set\u0103rilor nivelului fizic pentru fiecare telefon.\n<li class=\"l\"> Suport pentru LTE Security API: mapping RNTI-TMSI, coletare IMSI, profilare.  <\/ul>\n<p>Sursa: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=59135\">opennet.ro<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u0438\u0437 \u041a\u043e\u0440\u0435\u0439\u0441\u043a\u043e\u0433\u043e \u0438\u043d\u0441\u0442\u0438\u0442\u0443\u0442\u0430 \u043f\u0435\u0440\u0435\u0434\u043e\u0432\u044b\u0445 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0439 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0438 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0439 LTESniffer, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0439 \u0432 \u043f\u0430\u0441\u0441\u0438\u0432\u043d\u043e\u043c \u0440\u0435\u0436\u0438\u043c\u0435 (\u0431\u0435\u0437 \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0438 \u0441\u0438\u0433\u043d\u0430\u043b\u043e\u0432 \u0432 \u044d\u0444\u0438\u0440) \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u043f\u0440\u043e\u0441\u043b\u0443\u0448\u0438\u0432\u0430\u043d\u0438\u0435 \u0438 \u043f\u0435\u0440\u0435\u0445\u0432\u0430\u0442 \u0442\u0440\u0430\u0444\u0438\u043a\u0430 \u043c\u0435\u0436\u0434\u0443 \u0431\u0430\u0437\u043e\u0432\u043e\u0439 \u0441\u0442\u0430\u043d\u0446\u0438\u0435\u0439 \u0438 \u0441\u043e\u0442\u043e\u0432\u044b\u043c \u0442\u0435\u043b\u0435\u0444\u043e\u043d\u043e\u043c \u0432 \u0441\u0435\u0442\u044f\u0445 4G LTE. \u0418\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0439 \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u0443\u0442\u0438\u043b\u0438\u0442\u044b \u0434\u043b\u044f \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u043f\u0435\u0440\u0435\u0445\u0432\u0430\u0442\u0430 \u0442\u0440\u0430\u0444\u0438\u043a\u0430 \u0438 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e API \u0434\u043b\u044f \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u0438 LTESniffer \u0432 \u0441\u0442\u043e\u0440\u043e\u043d\u043d\u0438\u0445 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f\u0445. LTESniffer \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0432\u0430\u0435\u0442 \u0434\u0435\u043a\u043e\u0434\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0444\u0438\u0437\u0438\u0447\u0435\u0441\u043a\u043e\u0433\u043e \u043a\u0430\u043d\u0430\u043b\u0430 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-108534","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u0438\u0437 \u041a\u043e\u0440\u0435\u0439\u0441\u043a\u043e\u0433\u043e \u0438\u043d\u0441\u0442\u0438\u0442\u0443\u0442\u0430 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