{"id":56034,"date":"2020-02-03T00:00:00","date_gmt":"2020-02-02T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/proekt-tfc-razvivaet-paranoidalno-zashhishhyonnuyu-sistemu-obmena-soobshheniyami"},"modified":"2020-02-18T14:04:12","modified_gmt":"2020-02-18T11:04:12","slug":"proekt-tfc-razvivaet-paranoidalno-zashhishhyonnuyu-sistemu-obmena-soobshheniyami","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/novosti-interneta\/proekt-tfc-razvivaet-paranoidalno-zashhishhyonnuyu-sistemu-obmena-soobshheniyami","title":{"rendered":"Projekti TFC zhvillon nj\u00eb sistem komunikimi t\u00eb mbrojtur paranoikisht","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

N\u00eb kuad\u00ebr t\u00eb projektit TFC<\/a><\/noindex> (Biseda Tinfoil) \u00ebsht\u00eb b\u00ebr\u00eb nj\u00eb p\u00ebrpjekje p\u00ebr t\u00eb krijuar nj\u00eb prototip t\u00eb nj\u00eb sistemi t\u00eb mbrojtur dhe paranojak p\u00ebr shk\u00ebmbimin e mesazheve, q\u00eb do t\u00eb ruante sekretin e korrespondenc\u00ebs edhe n\u00eb rastin e komprometimit t\u00eb pajisjeve t\u00eb fundit. P\u00ebr t\u00eb leht\u00ebsuar auditimin, kodi i projektit \u00ebsht\u00eb shkruar n\u00eb gjuh\u00ebn Python dhe disponibel<\/a><\/noindex> n\u00eb p\u00ebrputhje me licenc\u00ebn GPLv3.<\/p>\n

Sistemet e zakonshme t\u00eb shk\u00ebmbimit t\u00eb mesazheve, q\u00eb p\u00ebrdorin enkriptimin end-to-end, lejojn\u00eb mbrojtjen e korrespondenc\u00ebs nga kapja n\u00eb server\u00ebt nd\u00ebrmjet\u00ebs dhe nga analiza e trafikut t\u00eb kalimit, por nuk mbrojn\u00eb nga problemet n\u00eb an\u00ebn e pajisjes klient. P\u00ebr t\u00eb komprometuar sistemet e bazuara n\u00eb enkriptimin end-to-end, mjafton t\u00eb kompromentohet sistemi operativ, firmware ose aplikacioni i mesazhereve n\u00eb pajisje, p\u00ebr shembull, p\u00ebrmes shfryt\u00ebzimit t\u00eb vulnerabiliteteve q\u00eb nuk jan\u00eb njohur m\u00eb par\u00eb, p\u00ebrmes nj\u00eb implementimi t\u00eb hersh\u00ebm t\u00eb fisheve apo mjeteve fizike n\u00eb pajisje, ose p\u00ebrmes d\u00ebrgimit t\u00eb nj\u00eb azhurnimi t\u00eb rrem\u00eb me backdoor (p\u00ebr shembull, n\u00ebn presionin e sh\u00ebrbimeve t\u00eb sigurimit ose grupeve kriminale). Edhe n\u00ebse \u00e7el\u00ebsat p\u00ebr enkriptimin ndodhen n\u00eb nj\u00eb token t\u00eb ve\u00e7ant\u00eb, n\u00eb prani t\u00eb kontrollit mbi sistemin e p\u00ebrdoruesit gjithmon\u00eb mbetet mund\u00ebsia p\u00ebr t\u00eb gjurmuar proceset, p\u00ebr t\u00eb kapur t\u00eb dh\u00ebnat nga tastiera dhe p\u00ebr t\u00eb monitoruar daljen n\u00eb ekran.<\/p>\n

TFC ofron nj\u00eb kompleks softuerik dhe harduerik, q\u00eb k\u00ebrkon p\u00ebrdorimin e tre kompjuter\u00ebve t\u00eb ve\u00e7ant\u00eb nga ana e klientit dhe nj\u00eb ndar\u00ebs special harduerik. T\u00eb gjith\u00eb trafiku gjat\u00eb nd\u00ebrveprimit t\u00eb pjes\u00ebmarr\u00ebsve n\u00eb shk\u00ebmbimin e mesazheve kalon p\u00ebrmes nj\u00eb rrjeti anonim Tor, dhe programet p\u00ebr shk\u00ebmbimin e mesazheve jan\u00eb realizuar n\u00eb form\u00ebn e sh\u00ebrbimeve t\u00eb fshehura Tor (p\u00ebrdoruesit identifikohen gjat\u00eb shk\u00ebmbimit t\u00eb mesazheve p\u00ebrmes adresave t\u00eb sh\u00ebrbimeve t\u00eb fshehura dhe \u00e7el\u00ebsave). <\/p>\n

\"Projekti<\/a><\/noindex><\/center><\/p>\n

Kompjuteri i par\u00eb funksionon si nj\u00eb port\u00eb p\u00ebr lidhjen me rrjetin dhe p\u00ebr fillimin e sh\u00ebrbimit t\u00eb fshehur Tor. Porta manipulon vet\u00ebm me t\u00eb dh\u00ebnat e enkriptuara, nd\u00ebrsa p\u00ebr enkriptimin dhe dekriptimin p\u00ebrdoren dy kompjuter\u00eb t\u00eb tjer\u00eb. Kompjuteri i dyt\u00eb mund t\u00eb p\u00ebrdoret vet\u00ebm p\u00ebr dekriptimin dhe shfaqjen e mesazheve t\u00eb marra, nd\u00ebrsa i treti vet\u00ebm p\u00ebr enkriptimin dhe d\u00ebrgimin e mesazheve t\u00eb reja. Prandaj, kompjuteri i dyt\u00eb ka vet\u00ebm \u00e7el\u00ebsat p\u00ebr dekriptimin, dhe i treti vet\u00ebm \u00e7el\u00ebsat p\u00ebr enkriptimin. <\/p>\n

Kompjuter\u00ebt e dyt\u00eb dhe t\u00eb tret\u00eb nuk kan\u00eb lidhje t\u00eb drejtp\u00ebrdrejt\u00eb me rrjetin dhe jan\u00eb t\u00eb ndar\u00eb nga kompjuteri-gatish\u00ebm me nj\u00eb USB-splicer t\u00eb ve\u00e7ant\u00eb, q\u00eb p\u00ebrdor parimindiodi i t\u00eb dh\u00ebnave<\/a><\/noindex>dhe kalon t\u00eb dh\u00ebnat fizikisht vet\u00ebm n\u00eb nj\u00eb drejtim. Splicer-i lejon vet\u00ebm d\u00ebrgimin e t\u00eb dh\u00ebnave drejt kompjuterit t\u00eb dyt\u00eb dhe vet\u00ebm marrjen e t\u00eb dh\u00ebnave nga kompjuteri i tret\u00eb. Drejtimi i t\u00eb dh\u00ebnave n\u00eb splicer \u00ebsht\u00eb i kufizuar p\u00ebrmes optron\u00ebve<\/a><\/noindex> (nj\u00eb nd\u00ebrprerje e thjesht\u00eb e linjave Tx dhe Rx n\u00eb kabllo nuk \u00ebsht\u00eb e mjaftueshme, pasi nd\u00ebrprerja nuk p\u00ebrjashton transmetimin e t\u00eb dh\u00ebnave n\u00eb drejtim t\u00eb kund\u00ebrt dhe nuk garanton q\u00eb linja Tx nuk do t\u00eb p\u00ebrdoret p\u00ebr lexim, nd\u00ebrsa Rx p\u00ebr d\u00ebrges\u00eb). Splicer-i mund t\u00eb nd\u00ebrtohet nga pjes\u00eb t\u00eb disponueshme, skemat jan\u00eb bashk\u00ebngjitur<\/a><\/noindex> (PCB<\/a><\/noindex>) dhe jan\u00eb t\u00eb disponueshme n\u00ebn licenc\u00ebn GNU FDL 1.3. <\/p>\n

\"Projekti<\/a><\/noindex><\/center><\/p>\n

Me k\u00ebt\u00eb skem\u00eb, kompromitimi i gatish\u00ebm nuk do t\u00eb lejoj\u00eb<\/a><\/noindex> q\u00eb t\u00eb arrihet qasja n\u00eb \u00e7el\u00ebsat e enkriptimit dhe nuk do t\u00eb jap\u00eb mund\u00ebsi p\u00ebr t\u00eb vazhduar sulmin ndaj pajisjeve t\u00eb tjera. N\u00eb rastin e kompromitimit t\u00eb kompjuterit, mbi t\u00eb cilin jan\u00eb vendosur \u00e7el\u00ebsat p\u00ebr dekriptim, informacioni nga ai nuk mund t\u00eb d\u00ebrgohet n\u00eb bot\u00ebn e jashtme, pasi rrjedha e t\u00eb dh\u00ebnave kufizohet vet\u00ebm n\u00eb marrjen e informacionit, nd\u00ebrsa transmetimi i tij bllokohet nga diodi i t\u00eb dh\u00ebnave.<\/p>\n

\"Projekti<\/a><\/noindex><\/center><\/p>\n

Enkriptimi kryhet bazuar n\u00eb \u00e7el\u00ebsa 256-bit\u00eb n\u00eb XChaCha20-Poly1305, p\u00ebr mbrojtjen e \u00e7el\u00ebsave me nj\u00eb fjal\u00ebkalim aplikohet nj\u00eb funksion hash i ngadalsh\u00ebm Argon2id<\/a><\/noindex>. P\u00ebr shk\u00ebmbimin e \u00e7el\u00ebsave aplikohet X448<\/a><\/noindex> (protokolli Diffie - Hellman mbi baz\u00ebn e Curve448) ose \u00e7el\u00ebsa PSK (pre-shared<\/a><\/noindex>). \u00c7do mesazh d\u00ebrgohet n\u00eb modin e sekretit t\u00eb p\u00ebrsosur t\u00eb drejtp\u00ebrdrejt\u00eb (PFS, Perfect Forward Secrecy<\/a><\/noindex>) mbi baz\u00ebn e hash-it Blake2b, ku kompromitimi i nj\u00ebrit prej \u00e7el\u00ebsave t\u00eb gjat\u00eb nuk lejon dekriptimin e nj\u00eb seance t\u00eb kapur m\u00eb par\u00eb. Nd\u00ebrfaqja e aplikacionit \u00ebsht\u00eb tejet e thjesht\u00eb dhe p\u00ebrfshin nj\u00eb dritare t\u00eb ndar\u00eb n\u00eb tri zona - d\u00ebrgimi, marrja dhe linja komanduese me logun e bashk\u00ebpunimit me gatishm\u00ebrin\u00eb. Menaxhimi kryhet p\u00ebrmes nj\u00eb grupi komandash<\/a><\/noindex>.<\/p>\n

\"Projekti<\/a><\/noindex><\/center><\/p>\n

<\/a><\/noindex><\/p>\n

Burimi: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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