{"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\/news\/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> (Tinfoil Chat) \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 paranoid p\u00ebr shk\u00ebmbimin e mesazheve, i cili do t\u00eb ruante sekretin e komunikimit edhe n\u00eb rastin e komprometimit t\u00eb pajisjeve p\u00ebrfundimtare. P\u00ebr t\u00eb leht\u00ebsuar auditimin, kodi i projektit \u00ebsht\u00eb shkruar n\u00eb gjuh\u00ebn Python dhe \u00ebsht\u00eb n\u00eb dispozicion<\/a><\/noindex> n\u00eb licenc\u00eb GPLv3.<\/p>\n

Sistemet e zakonshme t\u00eb shk\u00ebmbimit t\u00eb mesazheve q\u00eb p\u00ebrdorin encryption t\u00eb plot\u00eb lejojn\u00eb mbrojtjen e komunikimeve nga interceptimi n\u00eb server\u00ebt nd\u00ebrmjet\u00ebs dhe nga analiza e trafikut kalimtar, por nuk mbrojn\u00eb nga problemet n\u00eb an\u00ebn e pajisjes s\u00eb klientit. P\u00ebr t\u00eb komprometuar sistemet me encryption t\u00eb plot\u00eb, mjafton t\u00eb komprometohet sistemi operativ, firmware ose aplikacioni i mesazheve n\u00eb pajisjen p\u00ebrfundimtare, p\u00ebr shembull, p\u00ebrmes shfryt\u00ebzimit t\u00eb vulnerabiliteteve t\u00eb panjohura m\u00eb par\u00eb, p\u00ebrmes implantimit t\u00eb software ose hardware n\u00eb pajisje p\u00ebrmes forcimit, ose p\u00ebrmes dor\u00ebzimit t\u00eb nj\u00eb azhurnimi t\u00eb rrem\u00eb me backdoor (p\u00ebr shembull, n\u00ebn presionin e sh\u00ebrbimeve sekrete ose grupeve kriminale). Edhe n\u00ebse \u00e7el\u00ebsat p\u00ebr encryption ndodhen n\u00eb nj\u00eb token t\u00eb ve\u00e7ant\u00eb, n\u00eb prani t\u00eb kontrollit mbi sistemin e p\u00ebrdoruesit gjithmon\u00eb ka mund\u00ebsi p\u00ebr t\u00eb ndjekur proceset, p\u00ebr t\u00eb interceptuar t\u00eb dh\u00ebna nga tastiera dhe p\u00ebr t\u00eb ndjekur outputin n\u00eb ekran.<\/p>\n

TFC ofron nj\u00eb kompleks softuerik-hardware, q\u00eb k\u00ebrkon p\u00ebrdorimin e tre kompjuter\u00ebve t\u00eb ve\u00e7ant\u00eb n\u00eb an\u00ebn e klientit dhe nj\u00eb ndar\u00ebs t\u00eb ve\u00e7ant\u00eb hardware. T\u00eb gjith\u00eb trafiku n\u00eb procesin e nd\u00ebrveprimit t\u00eb pjes\u00ebmarr\u00ebsve n\u00eb shk\u00ebmbimin e mesazheve kalon p\u00ebrmes rrjetit anonim Tor, dhe programet p\u00ebr shk\u00ebmbimin e mesazheve realizohen n\u00eb form\u00ebn e sh\u00ebrbimeve t\u00eb fshehta Tor (p\u00ebrdoruesit gjat\u00eb shk\u00ebmbimit t\u00eb mesazheve identifikohen p\u00ebrmes adresave t\u00eb sh\u00ebrbimeve t\u00eb fshehta dhe \u00e7el\u00ebsave). <\/p>\n

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

Kompjuteri i par\u00eb sh\u00ebrben si nj\u00eb gateway p\u00ebr t'u lidhur n\u00eb rrjet dhe p\u00ebr t\u00eb nisur sh\u00ebrbimin e fsheht\u00eb Tor. Gateway manipulon vet\u00ebm t\u00eb dh\u00ebnat q\u00eb jan\u00eb tashm\u00eb t\u00eb enkriptuara, nd\u00ebrsa p\u00ebr enkriptimin dhe dekryptimin p\u00ebrdoren dy kompjuter\u00ebt e tjer\u00eb. Kompjuteri i dyt\u00eb mund t\u00eb p\u00ebrdoret vet\u00ebm p\u00ebr dekryptimin dhe shfaqjen e mesazheve t\u00eb marra, nd\u00ebrsa kompjuteri i tret\u00eb vet\u00ebm p\u00ebr enkriptimin dhe d\u00ebrgimin e mesazheve t\u00eb reja. P\u00ebrkat\u00ebsisht, kompjuteri i dyt\u00eb ka vet\u00ebm \u00e7el\u00ebsat p\u00ebr dekryptim, nd\u00ebrsa kompjuteri i tret\u00eb ka vet\u00ebm \u00e7el\u00ebsat p\u00ebr enkriptim. <\/p>\n

Kompjuter\u00ebt dy dhe tri nuk kan\u00eb lidhje t\u00eb drejtp\u00ebrdrejt\u00eb me rrjetin dhe jan\u00eb t\u00eb ndar\u00eb nga kompjuteri-p\u00ebr\u00e7ues me nj\u00eb shp\u00ebrndar\u00ebs USB t\u00eb ve\u00e7ant\u00eb, q\u00eb p\u00ebrdor parimin «dioda e t\u00eb dh\u00ebnave<\/a><\/noindex>» dhe kalon t\u00eb dh\u00ebnat fizikisht vet\u00ebm n\u00eb nj\u00eb drejtim. Shp\u00ebrndar\u00ebsi lejon vet\u00ebm d\u00ebrgimin e t\u00eb dh\u00ebnave n\u00eb drejtim t\u00eb 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 shp\u00ebrndar\u00ebs kufizohet p\u00ebrmes optrok\u00ebve<\/a><\/noindex> (nj\u00eb thyerje e thjesht\u00eb e linjave Tx dhe Rx n\u00eb kabllo nuk \u00ebsht\u00eb e mjaftueshme, pasi thyerja nuk p\u00ebrjashton d\u00ebrgimin 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\u00ebrgim). Shp\u00ebrndar\u00ebsi mund t\u00eb nd\u00ebrtohet nga pjes\u00eb t\u00eb p\u00ebrdorura, skemat jan\u00eb t\u00eb bashkangjitura<\/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 nj\u00eb skem\u00eb t\u00eb till\u00eb, komprometimi i gateway-it nuk do lejojn\u00eb<\/a><\/noindex> mund t\u00eb siguroj\u00eb qasje n\u00eb \u00e7el\u00ebsat e enkriptimit dhe nuk do t\u00eb lejoj\u00eb vazhdimin e sulmit ndaj pajisjeve t\u00eb tjera. N\u00eb rastin e komprometimit t\u00eb kompjuterit, n\u00eb t\u00eb cilin jan\u00eb vendosur \u00e7el\u00ebsat p\u00ebr dekriptim, informacioni nuk mund t\u00eb transmetohet n\u00eb bot\u00ebn e jashtme, pasi fluksi i t\u00eb dh\u00ebnave \u00ebsht\u00eb i kufizuar vet\u00ebm n\u00eb marrjen e informacionit, nd\u00ebrsa d\u00ebrgimi i s\u00eb nj\u00ebjt\u00ebs bllokohet nga dioda e t\u00eb dh\u00ebnave.<\/p>\n

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

Enkriptimi \u00ebsht\u00eb kryer mbi baz\u00ebn e \u00e7el\u00ebsave 256-bit\u00eb n\u00eb XChaCha20-Poly1305, p\u00ebr mbrojtjen e \u00e7el\u00ebsave p\u00ebrdoret nj\u00eb funksion hash i ngadalsh\u00ebm Argon2id<\/a><\/noindex>. P\u00ebr shk\u00ebmbimin e \u00e7el\u00ebsave p\u00ebrdoret X448<\/a><\/noindex> (protokolli Diffie - Hellman bazuar n\u00eb Curve448) ose \u00e7el\u00ebsat PSK (pre-shared<\/a><\/noindex>). \u00c7do mesazh transmetohet n\u00eb m\u00ebnyr\u00ebn e privat\u00ebsis\u00eb s\u00eb p\u00ebrkryer t\u00eb menj\u00ebhershme (PFS, Perfect Forward Secrecy<\/a><\/noindex>) mbi baz\u00ebn e hash-eve Blake2b, p\u00ebr t\u00eb cilin komprometimi i nj\u00ebr\u00ebs nga \u00e7el\u00ebsat e p\u00ebrhersh\u00ebm nuk lejon dekryptimin e seanc\u00ebs s\u00eb m\u00ebparshme t\u00eb kapur. Nd\u00ebrfaqja e aplikacionit \u00ebsht\u00eb ekstremisht e thjesht\u00eb dhe p\u00ebrfshin nj\u00eb dritare t\u00eb ndar\u00eb n\u00eb tre zona - d\u00ebrgimi, marrja dhe nj\u00eb linj\u00eb komandash me logun e nd\u00ebrveprimit me p\u00ebr\u00e7uesin. Menaxhimi b\u00ebhet p\u00ebrmes nj\u00eb seti 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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