{"id":31080,"date":"2019-10-31T21:39:19","date_gmt":"2019-10-31T18:39:19","guid":{"rendered":"https:\/\/prohoster.info\/blog\/steganografiya-v-fajlovoj-sisteme\/"},"modified":"2019-10-31T21:39:19","modified_gmt":"2019-10-31T18:39:19","slug":"steganografiya-v-fajlovoj-sisteme","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/administrirovanie\/steganografiya-v-fajlovoj-sisteme","title":{"rendered":"Steganografia n\u00eb sistemin e skedar\u00ebve","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>P\u00ebrsh\u00ebndetje, Habr. <\/p>\n<p><\/p>\n<p>Dua t\u00eb prezantoj nj\u00eb projekt t\u00eb vog\u00ebl n\u00eb lidhje me <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%A1%D1%82%D0%B5%D0%B3%D0%B0%D0%BD%D0%BE%D0%B3%D1%80%D0%B0%D1%84%D0%B8%D1%8F\">steganografin\u00eb<\/a><\/noindex>, e b\u00ebr\u00eb n\u00eb koh\u00ebn e lir\u00eb nga studimet. <\/p>\n<p><\/p>\n<p>Kam b\u00ebr\u00eb nj\u00eb projekt p\u00ebr ruajtjen e fsheht\u00eb t\u00eb informacionit n\u00eb sistemin e skedar\u00ebve ( m\u00eb tej <strong>FS<\/strong>).<br \/>\n) Kjo mund t\u00eb aplikohet p\u00ebr vjedhjen e informacionit t\u00eb ndjesh\u00ebm p\u00ebr q\u00ebllime arsimore.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Steganografia n\u00eb sistemin e skedar\u00ebve\" src=\"\/wp-content\/uploads\/2019\/04\/d6639b37e1b1fe57b80288e671176fe3.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Si nj\u00eb shembull eksperimental \u00ebsht\u00eb zgjedhur nj\u00eb sistem skedar\u00ebsh i vjet\u00ebr linuksian <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Ext2\">ext2<\/a><\/noindex>. <\/p>\n<p>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h3 id=\"realizaciya\">Realizimi<\/h3>\n<p><\/p>\n<h4 id=\"soobrazheniya-o-realizacii\">Konsideratat p\u00ebr implementimin<\/h4>\n<p><\/p>\n<p>\u0415\u0441\u043b\u0438 \u0445\u043e\u0440\u043e\u0448\u043e &#171;\u0440\u0430\u0437\u0434\u0440\u0430\u043a\u043e\u043d\u0438\u0442\u044c&#187; \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 ext2, \u0442\u043e \u043c\u043e\u0436\u043d\u043e \u0437\u0430\u043c\u0435\u043d\u0438\u0442\u044c, \u0447\u0442\u043e \u0432 \u0424\u0421 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u0435\u0442 \u0442\u0430\u043a \u043d\u0430\u0437\u044b\u0432\u0430\u0435\u043c\u044b\u0439 <noindex><a rel=\"nofollow\" href=\"http:\/\/www.nongnu.org\/ext2-doc\/ext2.html#SUPERBLOCK\"><strong>Superblocks<\/strong><\/a><\/noindex>, n\u00eb t\u00eb cilin jepet informacioni kryesor mbi sistemin. Pas k\u00ebsaj, un\u00eb gjetsha <noindex><a rel=\"nofollow\" href=\"http:\/\/www.nongnu.org\/ext2-doc\/ext2.html#BLOCK-BITMAP\"><strong>Block Bitmap<\/strong><\/a><\/noindex> dhe <noindex><a rel=\"nofollow\" href=\"http:\/\/www.nongnu.org\/ext2-doc\/ext2.html#INODE-TABLE\"><strong>Tabela e Inode-ve<\/strong><\/a><\/noindex>. Pothuajse menj\u00ebher\u00eb lindi ideja p\u00ebr t\u00eb regjistruar informacionin n\u00eb blloqet e zbraz\u00ebta t\u00eb race s\u00eb FS. Tani duhej t\u00eb mendonim p\u00ebr mbrojtjen nga programuesi, i armatosur me <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Hex-%D1%80%D0%B5%D0%B4%D0%B0%D0%BA%D1%82%D0%BE%D1%80\">editorin hex<\/a><\/noindex>. <\/p>\n<p><\/p>\n<p>N\u00ebse ruani informacionin e fshehur pa enkriptim, at\u00ebher\u00eb, edhe p\u00ebrkund\u00ebr p\u00ebrhapjes s\u00eb tij n\u00eb FS, ajo do t\u00eb jet\u00eb akoma shum\u00eb e dukshme, ve\u00e7an\u00ebrisht nese programuesi di se \u00e7far\u00eb duhet t\u00eb k\u00ebrkoj\u00eb. Prandaj, u mor vendimi p\u00ebr t\u00eb enkriptuar t\u00eb gjitha blloqet e skedarit burimor. Kam zgjedhur algoritmin e enkriptimit <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Advanced_Encryption_Standard\">AES<\/a><\/noindex>, por si\u00e7 e kuptoni, kjo nuk \u00ebsht\u00eb thelb\u00ebsore.<\/p>\n<p><\/p>\n<p>P\u00ebr t\u00eb ndar\u00eb blloqet e nevojshme nga t\u00eb gjitha t\u00eb tjerat gjat\u00eb leximit, u vendos t\u00eb shtohet nj\u00eb p\u00ebrdorues i ve\u00e7ant\u00eb n\u00eb fillim t\u00eb \u00e7do blloku. Ky p\u00ebrdorues ishte koduar n\u00eb var\u00ebsi t\u00eb numrit t\u00eb bllokut n\u00eb skedarin burimor. Kjo strategji jo vet\u00ebm q\u00eb ndihmon p\u00ebr t\u00eb gjetur blloqet e nevojshme, por gjithashtu siguron rendin e tyre t\u00eb sakt\u00eb.<\/p>\n<p><\/p>\n<p>Parimi i p\u00ebrgjithsh\u00ebm i funksionimit t\u00eb sistemit.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Steganografia n\u00eb sistemin e skedar\u00ebve\" src=\"\/wp-content\/uploads\/2019\/04\/cb6e712aeffafe87b1ad10e4ed5b0a39.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<h4 id=\"algoritm-zapisi\">Algoritmi i regjistrimit<\/h4>\n<p><\/p>\n<p>Hapat:<\/p>\n<p><\/p>\n<ul>\n<li>Fillimisht, shkruani ndonj\u00eb informacion n\u00eb sistemin origjinal t\u00eb skedar\u00ebve;<\/li>\n<li>Fshini k\u00ebt\u00eb informacion (nuk \u00ebsht\u00eb e domosdoshme q\u00eb ta fshini t\u00eb gjith\u00eb); <\/li>\n<li>Shkoni skedarin q\u00eb do fshihet n\u00eb blloqe me t\u00eb nj\u00ebjtin gjat\u00ebsi, duke shtuar nj\u00eb p\u00ebrdorues;<\/li>\n<li>Shkruani k\u00ebto blloqe;<\/li>\n<li>Vendosni blloqet e koduara n\u00eb blloqet e zbraz\u00ebta t\u00eb FS.<\/li>\n<\/ul>\n<p>\n<b class=\"spoiler_title\">P\u00ebr dashamir\u00ebsit e diagram\u00ebve t\u00eb bllokut<\/b><\/p>\n<p>M\u00eb posht\u00eb \u00ebsht\u00eb paraqitur nj\u00eb diagram blloku i algoritmit t\u00eb regjistrimit. Algoritmi merr kat\u00ebr skedar\u00eb si input:<br \/>\n-Imazhi i sistemit t\u00eb skedar\u00ebve t\u00eb ndryshuesh\u00ebm;<br \/>\n-Skedari q\u00eb n\u00ebnshtrohet steganografis\u00eb;<br \/>\n-Skedari me \u00e7el\u00ebsin e kodimit p\u00ebr AES;<br \/>\n-Skedari me p\u00ebrdoruesin.<br \/>\n<img decoding=\"async\" alt=\"Steganografia n\u00eb sistemin e skedar\u00ebve\" src=\"\/wp-content\/uploads\/2019\/04\/3089bf0d55cbdca1a98e4ee992089665.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Duhet theksuar se ky algorit\u00ebm ka nj\u00eb disavantazh: pas regjistrimit t\u00eb skedarit n\u00eb FS, <strong>nuk \u00ebsht\u00eb e mundur<\/strong> t\u00eb regjistrosh di\u00e7ka t\u00eb re n\u00eb sistemin e skedar\u00ebve, pasi \u00e7do informacion i ri mund t\u00eb bjer\u00eb n\u00eb ato blloqe q\u00eb i kemi rezervuar p\u00ebr skedarin ton\u00eb t\u00eb steganografuar, por kjo hap mund\u00ebsin\u00eb p\u00ebr \"mashtimin e shpejt\u00eb t\u00eb gjurm\u00ebve\". <\/p>\n<p><\/p>\n<p>Por \u00ebsht\u00eb mjaft e qart\u00eb se si mund t\u00eb rregullohet kjo: \u00ebsht\u00eb e nevojshme t\u00eb ri-programohet algoritmi i regjistrimit t\u00eb blloqeve n\u00eb sistemin e skedar\u00ebve. Kjo \u00ebsht\u00eb nj\u00eb detyr\u00eb e qart\u00eb, por jasht\u00ebzakonisht e lodhshme.<br \/>\nP\u00ebr Proof Of Concept nuk e kam zbatuar k\u00ebt\u00eb.<\/p>\n<p><\/p>\n<p>Si rezultat, do t\u00eb rezultojn\u00eb ndryshimet e m\u00ebposhtme n\u00eb sistemin e skedar\u00ebve, k\u00ebshtu duket sistemi i skedar\u00ebve para steganografis\u00eb (paraprakisht ishte regjistruar nj\u00eb skedar audio).<br \/>\n<img decoding=\"async\" alt=\"Steganografia n\u00eb sistemin e skedar\u00ebve\" src=\"\/wp-content\/uploads\/2019\/04\/a779de50121de2bafacab9d891b5f5df.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nDhe k\u00ebshtu duket sistemi i skedar\u00ebve me informacionin e steganografuar tashm\u00eb.<br \/>\n<img decoding=\"async\" alt=\"Steganografia n\u00eb sistemin e skedar\u00ebve\" src=\"\/wp-content\/uploads\/2019\/04\/5722200a90d720f96c0aad5b4a5a11ae.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<h4 id=\"algoritm-chteniya\">Algoritmi i leximit<\/h4>\n<p><\/p>\n<p>Hapat:<\/p>\n<p><\/p>\n<ul>\n<li>Me njohjen e \u00e7el\u00ebsit dhe m\u00ebnyr\u00ebs s\u00eb nd\u00ebrtimit t\u00eb markuesve, p\u00ebrgatitni markuesit e par\u00eb N, me garancin\u00eb q\u00eb N, e shum\u00ebzuar me gjat\u00ebsi blloku t\u00eb sistemit t\u00eb skedar\u00ebve \u00ebsht\u00eb m\u00eb e madhe se gjat\u00ebsi e skedarit t\u00eb steganografuar;<\/li>\n<li>Kryeni k\u00ebrkimin e blloqeve n\u00eb sistemin e skedar\u00ebve, q\u00eb fillojn\u00eb me markuesit; <\/li>\n<li>Dekriptoni blloqet e marra dhe ndan\u00eb markuesit;<\/li>\n<li>Grumbuloni blloqet e marra n\u00eb rendin e duhur dhe merrni skedarin origjinal.<\/li>\n<\/ul>\n<p>\n<b class=\"spoiler_title\">P\u00ebr dashamir\u00ebsit e diagram\u00ebve t\u00eb bllokut<\/b><\/p>\n<p>M\u00eb posht\u00eb \u00ebsht\u00eb paraqitur nj\u00eb diagram i algoritmit t\u00eb regjistrimit. N\u00eb hyrje, algoritmi merr tre skedar\u00eb:<br \/>\n- Imazhi i sistemit t\u00eb skedar\u00ebve;<br \/>\n-Skedari me \u00e7el\u00ebsin e kodimit p\u00ebr AES;<br \/>\n-Skedari me p\u00ebrdoruesin.<br \/>\n<img decoding=\"async\" alt=\"Steganografia n\u00eb sistemin e skedar\u00ebve\" src=\"\/wp-content\/uploads\/2019\/04\/9dcfe680121a30c1b17b5a4cdbd76dc3.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Pas pun\u00ebs s\u00eb programit shfaqet nj\u00eb skedar Read, i cili do t\u00eb jet\u00eb skedari i nxjerr\u00eb nga sistemi fs steganografik. N\u00ebse \u00e7el\u00ebsi ose markuesi jan\u00eb treguar gabimisht, at\u00ebher\u00eb skedari Read do t\u00eb jet\u00eb bosh.<br \/>\n(\u0434\u043b\u044f \u043b\u044e\u0431\u0438\u0442\u0435\u043b\u0435\u0439 \u043a\u0440\u0430\u0441\u0438\u0432\u043e\u0441\u0442\u0435\u0439 \u043c\u043e\u0436\u043d\u043e \u0432\u043a\u0440\u0430\u043f\u043b\u044f\u0442\u044c \u043d\u0435 \u0442\u043e\u043b\u044c\u043a\u043e \u0444\u0430\u0439\u043b, \u043d\u043e &#171;\u0448\u0430\u043f\u043a\u0443&#187;, \u0441\u043e\u0434\u0435\u0440\u0436\u0430\u0449\u0443\u044e \u043c\u0435\u0442\u0430\u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044e: \u0438\u043c\u044f \u0444\u0430\u0439\u043b\u0430, \u043f\u0440\u0430\u0432\u0430, \u0432\u0440\u0435\u043c\u044f \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0438 \u0442.\u0434.)<\/p>\n<p><\/p>\n<h4 id=\"avtomatizaciya-zapuska\">Automatizimi i fillimit<\/h4>\n<p><\/p>\n<p>P\u00ebr leht\u00ebsi, jan\u00eb shkruar skriptet bash q\u00eb automatizojn\u00eb fillimin n\u00eb Linux (testuar n\u00eb Ubuntu 16.04.3 LTS).<br \/>\nDo t\u00eb shqyrtojm\u00eb fillimin hap pas hapi.<br \/>\nShkrimi:<\/p>\n<p><\/p>\n<ol>\n<li>sudo Copy_Flash.sh \u201cDEVICE\u201d \u2014 marrim imazhin e FS nga DEVICE (flashi);<\/li>\n<li>.\/Write.sh \u201cFILE\u201d \u201cKEY\u201d \u201cMARKER\u201d \u2013 krijojm\u00eb nj\u00eb ambient virtual, shkarkojm\u00eb bibliotekat e nevojshme dhe fillojm\u00eb skriptin p\u00ebr shkrim;<\/li>\n<li>sudo .\/Write_Flash.sh \u201cDEVICE\u201d \u2013 shkruajm\u00eb FS t\u00eb ndryshuar rishtazi n\u00eb DEVICE.<\/li>\n<\/ol>\n<p><\/p>\n<p>Leximi:<\/p>\n<p><\/p>\n<ol>\n<li>sudo Copy_Flash.sh \u201cDEVICE\u201d \u2014 marrim imazhin e FS nga DEVICE (flashi);<\/li>\n<li>.\/Read.sh \u201cKEY\u201d \u2018MARKER\u201d \u2014 krijojm\u00eb nj\u00eb ambient virtual, shkarkojm\u00eb bibliotekat e nevojshme dhe fillojm\u00eb skriptin p\u00ebr lexim;<\/li>\n<li>N\u00eb katalogun aktual hapim skedarin Read \u2013 kjo \u00ebsht\u00eb informata steganografike.<\/li>\n<\/ol>\n<p><\/p>\n<h3 id=\"zaklyuchenie\">P\u00ebrfundimi<\/h3>\n<p><\/p>\n<p>Ky metod\u00eb steganografie, ndoshta, ka nevoj\u00eb p\u00ebr p\u00ebrmir\u00ebsim, testim shtes\u00eb dhe zgjerim n\u00eb sisteme m\u00eb popullore skedar\u00ebsh si <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/FAT32\">Fat32<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/NTFS\">NTFS<\/a><\/noindex> dhe <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Ext4\">ext4<\/a><\/noindex>.<br \/>\nQ\u00ebllimi i k\u00ebsaj pune ishte t\u00eb tregohej parimi, p\u00ebrmes t\u00eb cilit mund t\u00eb realizohet ruajtja e fsheht\u00eb e informacionit n\u00eb sistemin e skedar\u00ebve.<br \/>\nMe algoritme t\u00eb till\u00eb mund t\u00eb ruhet informacioni pa frik\u00eb, dhe n\u00ebse me njohjen e \u00e7el\u00ebsit nj\u00eb sistem i till\u00eb mund t\u00eb hakohet jo p\u00ebrmes nj\u00eb provimi t\u00eb plot\u00eb (por me nj\u00eb algorit\u00ebm shum\u00eb t\u00eb gjat\u00eb), pa njohjen e \u00e7el\u00ebsit, ky sistem m\u00eb duket krejt\u00ebsisht i fort\u00eb; megjithat\u00eb, kjo mund t\u00eb jet\u00eb nj\u00eb tem\u00eb p\u00ebr nj\u00eb artikull t\u00eb ve\u00e7ant\u00eb.<\/p>\n<p><\/p>\n<p>I gjith\u00eb kodi \u00ebsht\u00eb realizuar n\u00eb gjuh\u00ebn Python version 3.5.2. <noindex><a rel=\"nofollow\" href=\"https:\/\/youtu.be\/FEAE3_xDKkA\">Nj\u00eb shembull i pun\u00ebs<\/a><\/noindex> \u00ebsht\u00eb paraqitur n\u00eb kanalin tim youtube. Kodi i plot\u00eb i projektit \u00ebsht\u00eb publikuar n\u00eb <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/MalahovMV\/Ext2Stego\">github<\/a><\/noindex>.<br \/>\n(\u0414\u0430-\u0434\u0430, \u044f \u0437\u043d\u0430\u044e, \u0447\u0442\u043e \u0434\u043b\u044f production \u0432\u0435\u0440\u0441\u0438\u0438 \u043d\u0443\u0436\u043d\u043e \u043f\u0438\u0441\u0430\u0442\u044c \u043d\u0430 \u0447\u0451\u043c-\u043d\u0438\u0431\u0443\u0434\u044c &#171;\u0431\u044b\u0441\u0442\u0440\u043e\u043c&#187;, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440 \u043d\u0430 \u0421\u0438 \ud83d\ude09 )<br \/>\nN\u00eb k\u00ebt\u00eb realizim, madh\u00ebsia e skedarit hyr\u00ebs p\u00ebr steganografin\u00eb nuk duhet t\u00eb kaloj\u00eb 1000 kB.<\/p>\n<p><\/p>\n<p>Dua t\u00eb shpreh mir\u00ebnjohjen time p\u00ebr p\u00ebrdoruesin <noindex><a rel=\"nofollow\" href=\"https:\/\/habrahabr.ru\/users\/pavelmstu\/\" class=\"user_link\">PavelMSTU<\/a><\/noindex> p\u00ebr k\u00ebshillat e vlefshme n\u00eb planifikimin e studimit dhe rekomandimet p\u00ebr formatimin e artikullit.<\/p>\n<p>Burimi: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/347604\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u0440\u0438\u0432\u0435\u0442, \u0425\u0430\u0431\u0440. \u0425\u043e\u0447\u0443 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u0442\u044c \u0432\u0430\u043c \u043d\u0435\u0431\u043e\u043b\u044c\u0448\u043e\u0439 \u043f\u0440\u043e\u0435\u043a\u0442 \u043f\u043e \u0441\u0442\u0435\u0433\u0430\u043d\u043e\u0433\u0440\u0430\u0444\u0438\u0438, \u0441\u0434\u0435\u043b\u0430\u043d\u043d\u044b\u0439 \u0432 \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0435 \u043e\u0442 \u0443\u0447\u0435\u0431\u044b \u0432\u0440\u0435\u043c\u044f. \u042f \u0441\u0434\u0435\u043b\u0430\u043b \u043f\u0440\u043e\u0435\u043a\u0442 \u043f\u043e \u0441\u043a\u0440\u044b\u0442\u043e\u043c\u0443 \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044e \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438 \u0432 \u0444\u0430\u0439\u043b\u043e\u0432\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 (\u0434\u0430\u043b\u0435\u0435 \u0424\u0421). \u042d\u0442\u043e \u043c\u043e\u0436\u043d\u043e \u043f\u0440\u0438\u043c\u0435\u043d\u0438\u0442\u044c \u0434\u043b\u044f \u043a\u0440\u0430\u0436\u0438 \u043a\u043e\u043d\u0444\u0438\u0434\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438 \u0432 \u043e\u0431\u0440\u0430\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0445 \u0446\u0435\u043b\u044f\u0445. \u0412 \u0432\u0438\u0434\u0435 \u043e\u043f\u044b\u0442\u043d\u043e\u0433\u043e \u043e\u0431\u0440\u0430\u0437\u0446\u0430 \u0431\u044b\u043b\u0430 \u0432\u044b\u0431\u0440\u0430\u043d\u0430 \u0432\u0435\u0441\u044c\u043c\u0430 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