{"id":184113,"date":"2026-11-03T23:41:02","date_gmt":"2026-11-03T21:41:02","guid":{"rendered":"https:\/\/prohoster.info\/blog\/news\/kriptograficheskij-izolyator-itb-s-formalnym-dokazatelstvom-nadyozhnosti"},"modified":"2026-11-03T23:41:07","modified_gmt":"2026-11-03T21:41:07","slug":"itb-cryptographic-isolator-with-formally-proven-reliability","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/itb-cryptographic-isolator-with-formally-proven-reliability","title":{"rendered":"Kryptografick\u00fd izol\u00e1tor ITB s form\u00e1ln\u00edm d\u016fkazem spolehlivosti","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Projekt ITB p\u0159edstavuje symetrick\u00fd kryptografick\u00fd izol\u00e1tor, navr\u017een\u00fd k obalen\u00ed standardn\u00edch pseudon\u00e1hodn\u00fdch funkc\u00ed (PRF) a hashov\u00fdch primitiv (AES, BLAKE2\/3, Areion a dal\u0161\u00edch) v propojen\u00e9 kombinatorn\u00ed a topologick\u00e9 bari\u00e9\u0159e. Na rozd\u00edl od klasick\u00fdch blokov\u00fdch a proudov\u00fdch \u0161ifrovac\u00edch m\u00f3d\u016f, architektura ITB se zam\u011b\u0159uje na struktur\u00e1ln\u00ed izolaci vnit\u0159n\u00edho primitiva, \u010d\u00edm\u017e br\u00e1n\u00ed \u0161\u00ed\u0159en\u00ed diferen\u010dn\u00edch a line\u00e1rn\u00edch charakteristik, algebraick\u00e9 linearizace a p\u0159\u00edm\u00fdch k\u00f3dov\u00e1n\u00ed pro SAT\/SMT a MILP \u0159e\u0161itele p\u0159es hranice bari\u00e9ry. K\u00f3d je naps\u00e1n v jazyce Go s n\u00edzko\u00farov\u0148ov\u00fdmi optimalizacemi v assembleru pro architektury x86_64 a ARM64 (Aarch64) a je \u0161\u00ed\u0159en pod licenc\u00ed Apache 2.0.<\/p>\n<p>Transformace dat v ITB je rozd\u011blena na dv\u011b propojen\u00e9 \u00farovn\u011b (Interlocked Barrier), \u0159\u00edzen\u00e9 osmi izolovan\u00fdmi kl\u00ed\u010dov\u00fdmi semeny (8-seed isolation) s lok\u00e1ln\u00ed evoluc\u00ed kl\u00ed\u010de prost\u0159ednictv\u00edm kask\u00e1dy s p\u0159\u00edm\u00fdm spojen\u00edm (ChainHash). Na prvn\u00ed \u00farovni bariera hodnocen\u00ed (Rank Barrier) prov\u00e1d\u00ed kl\u00ed\u010dovou kombinatorn\u00ed permutaci ka\u017ed\u00e9ho 48-bitov\u00e9ho bloku (nebo 168-bitov\u00e9ho bloku pro 512-bitov\u00e9 primitivy), p\u0159i\u010dem\u017e rozd\u011bluje bity otev\u0159en\u00e9ho textu do t\u0159\u00ed nez\u00e1visl\u00fdch region\u016f na z\u00e1klad\u011b dvoustup\u0148ov\u00e9ho vyhled\u00e1v\u00e1n\u00ed kombinace podle jeho \u010d\u00edsla (prostor vyv\u00e1\u017een\u00fdch d\u011blen\u00ed C(48, 16) * C(32, 16) \u010din\u00ed p\u0159ibli\u017en\u011b 2^70.20, zat\u00edmco v 168-bitov\u00e9m re\u017eimu C(168, 56) * C(112, 56) - p\u0159ibli\u017en\u011b 2^258.60). Na druh\u00e9 \u00farovni pixelov\u00e1 bari\u00e9ra (Pixel Barrier) mapuje data na m\u0159\u00ed\u017eku 8-bytesov\u00fdch prvk\u016f (8 kan\u00e1l\u016f, z nich\u017e ka\u017ed\u00fd obsahuje 7 bit\u016f dat a 1 bit pseudon\u00e1hodn\u00e9ho \u0161umu) s pixelov\u00fdm kl\u00ed\u010dov\u00fdm 7-bitov\u00fdm cyklick\u00fdm posunem, maskov\u00e1n\u00edm 7-bitov\u00fdch kan\u00e1l\u016f a v\u00fdb\u011brem pozice \u0161umov\u00e9ho bitu.<\/p>\n<p>Hlavn\u00ed vlastnosti projektu:<\/p>\n<ul>\n<li class=\"l\"> Experiment\u00e1ln\u00ed ov\u011b\u0159en\u00ed izoluj\u00edc\u00edch vlastnost\u00ed na zjevn\u011b nekryptografick\u00fdch funkc\u00edch (stresov\u00fd test se slab\u00fdmi primitivy). Sou\u010d\u00e1st\u00ed repozit\u00e1\u0159e je laboratorn\u00ed stan, kter\u00fd vkl\u00e1d\u00e1 oby\u010dejnou hash funkci FNV-1a do bari\u00e9ry. D\u00edky neline\u00e1rn\u00ed kombinatorick\u00e9 roz\u0159azovac\u00ed technice, d\u011blen\u00ed byt\u016f na hranic\u00edch 7bitov\u00fdch kan\u00e1l\u016f (GCD(7, 8) = 1) a injekci \u0161umov\u00fdch bit\u016f do ka\u017ed\u00e9ho bajtu je praktick\u00e9 pou\u017eit\u00ed nebo konstrukce \u0159e\u0161iteln\u00e9ho SAT\/SMT modelu podle otev\u0159en\u00e9ho a \u0161ifrovan\u00e9ho textu blokov\u00e1no ji\u017e ve f\u00e1zi formulace syst\u00e9mu rovnic.\n<li class=\"l\"> Strojov\u011b ov\u011b\u0159en\u00e1 form\u00e1ln\u00ed verifikace v jazyce Lean 4. V\u0161echny 12 z\u00e1kladn\u00edch matematick\u00fdch, kombinatorn\u00edch a bitov\u011b vektorov\u00fdch v\u011bt konstrukce (spolu s aplikovanou sch\u00e9matem hybridn\u00ed shody kl\u00ed\u010d\u016f 3-to-8 ze t\u0159\u00ed nez\u00e1visl\u00fdch KEM kan\u00e1l\u016f v APPS.md), popsan\u00e9 v dokumentu PROOFS.md, jsou zcela prok\u00e1z\u00e1ny v Lean 4 bez pou\u017eit\u00ed axiom\u016f a vynechan\u00fdch d\u016fkaz\u016f.\n<li class=\"l\"> Vestav\u011bn\u00fd n\u00e1stroj pro kryptoanalyzuj\u00edc\u00ed testov\u00e1n\u00ed, zahrnuj\u00edc\u00ed automatizovan\u00e9 kontroly: statistick\u00e9 baterie test\u016f, hodnocen\u00ed algebraick\u00e9ho stupn\u011b a nelinearity, kontrola izola\u010dn\u00edch kl\u00ed\u010d\u016f p\u0159i filtraci \u0161umu pomoc\u00ed CCA-or\u00e1kula a hled\u00e1n\u00ed zranitelnost\u00ed pomoc\u00ed extern\u00edch solver\u016f.\n<li class=\"l\"> Dva re\u017eimy provozu: standardn\u00ed autentizovan\u00fd re\u017eim (AEAD podle sch\u00e9matu MAC-Inside-Encrypt, kde je autentiza\u010dn\u00ed k\u00f3d po\u010d\u00edt\u00e1n a \u0161ifrov\u00e1n uvnit\u0159 kontejneru) a re\u017eim plauzibiln\u00edho pop\u0159en\u00ed (Plausible Deniability) na z\u00e1klad\u011b bezpodm\u00edne\u010dn\u00e9ho k\u00f3dov\u00e1n\u00ed COBS, p\u0159i\u010dem\u017e de\u0161ifrov\u00e1n\u00ed libovoln\u00fdm nespr\u00e1vn\u00fdm kl\u00ed\u010dem produkuje syntakticky spr\u00e1vn\u00e1 data bez indik\u00e1toru chyby.\n<li class=\"l\"> Ve spojen\u00ed s rychl\u00fdmi modern\u00edmi PRF (AES, BLAKE2\/3, Areion) je konstrukce vhodn\u00e1 pro bezpe\u010dnou v\u00fdm\u011bnu zpr\u00e1v, ukl\u00e1d\u00e1n\u00ed soubor\u016f a s\u00ed\u0165ov\u00e9 <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/vpn\/\"   title=\"VPN\" data-wpil-keyword-link=\"linked\">VPN<\/a>-tunele (p\u0159i skupinov\u00e9 paketov\u00e9 front\u011b tvo\u0159\u00ed re\u017eie form\u00e1tu p\u0159ibli\u017en\u011b 15%). Pro ochranu p\u0159ed \u00fatoky p\u0159es vedlej\u0161\u00ed kan\u00e1ly j\u00e1dra b\u011b\u017e\u00ed v konstantn\u00ed dob\u011b (constant-time) s plnou vynucenou \u010distotou z\u00e1sobn\u00edkov\u00fdch r\u00e1mc\u016f a procesorov\u00fdch registr\u016f (GPR, XMM\/YMM\/ZMM, NEON) po vol\u00e1n\u00edch.\n<li class=\"l\"> Pro architekturu x86_64 byly implementov\u00e1ny assemblerov\u00e9 j\u00e1dra vyu\u017e\u00edvaj\u00edc\u00ed instrukc\u00ed BMI2 (PEXT\/PDEP), AES-NI, VAES, AVX2 a AVX-512, zat\u00edmco pro ARM64 (Aarch64) - na z\u00e1klad\u011b roz\u0161\u00ed\u0159en\u00ed NEON, Crypto Extensions a SVE2 (s p\u0159enosn\u00fdm n\u00e1vratem na \u010dist\u00fd Go). Na vrcholu jednotn\u00e9ho C ABI (libitb3) byly p\u0159ipraveny obalov\u00e9 vrstvy pro 33 programovac\u00edch jazyk\u016f.\n<\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=66610\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u043f\u0440\u043e\u0435\u043a\u0442 ITB, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u044e\u0449\u0438\u0439 \u0441\u0438\u043c\u043c\u0435\u0442\u0440\u0438\u0447\u043d\u044b\u0439 \u043a\u0440\u0438\u043f\u0442\u043e\u0433\u0440\u0430\u0444\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0438\u0437\u043e\u043b\u044f\u0442\u043e\u0440, \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u044b\u0439 \u0434\u043b\u044f \u043e\u0431\u0451\u0440\u0442\u044b\u0432\u0430\u043d\u0438\u044f \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u044b\u0445 \u043f\u0441\u0435\u0432\u0434\u043e\u0441\u043b\u0443\u0447\u0430\u0439\u043d\u044b\u0445 \u0444\u0443\u043d\u043a\u0446\u0438\u0439 (PRF) \u0438 \u0445\u044d\u0448-\u043f\u0440\u0438\u043c\u0438\u0442\u0438\u0432\u043e\u0432 (AES, BLAKE2\/3, Areion \u0438 \u0434\u0440\u0443\u0433\u0438\u0445) \u0432 \u0441\u0446\u0435\u043f\u043b\u0435\u043d\u043d\u044b\u0439 \u043a\u043e\u043c\u0431\u0438\u043d\u0430\u0442\u043e\u0440\u043d\u044b\u0439 \u0438 \u0442\u043e\u043f\u043e\u043b\u043e\u0433\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0431\u0430\u0440\u044c\u0435\u0440. \u0412 \u043e\u0442\u043b\u0438\u0447\u0438\u0435 \u043e\u0442 \u043a\u043b\u0430\u0441\u0441\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u0431\u043b\u043e\u0447\u043d\u044b\u0445 \u0438 \u043f\u043e\u0442\u043e\u043a\u043e\u0432\u044b\u0445 \u0440\u0435\u0436\u0438\u043c\u043e\u0432 \u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u0438\u044f, \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u0430 ITB \u043d\u0430\u0446\u0435\u043b\u0435\u043d\u0430 \u043d\u0430 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u043d\u0443\u044e \u0438\u0437\u043e\u043b\u044f\u0446\u0438\u044e \u0432\u043d\u0443\u0442\u0440\u0435\u043d\u043d\u0435\u0433\u043e \u043f\u0440\u0438\u043c\u0438\u0442\u0438\u0432\u0430, \u043f\u0440\u0435\u043f\u044f\u0442\u0441\u0442\u0432\u0443\u044f \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e \u0434\u0438\u0444\u0444\u0435\u0440\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u044b\u0445 \u0438 \u043b\u0438\u043d\u0435\u0439\u043d\u044b\u0445 \u0445\u0430\u0440\u0430\u043a\u0442\u0435\u0440\u0438\u0441\u0442\u0438\u043a, \u0430\u043b\u0433\u0435\u0431\u0440\u0430\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u043b\u0438\u043d\u0435\u0430\u0440\u0438\u0437\u0430\u0446\u0438\u0438, \u0430 \u0442\u0430\u043a\u0436\u0435 \u043f\u0440\u044f\u043c\u044b\u0445 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-184113","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.5 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u043f\u0440\u043e\u0435\u043a\u0442 ITB, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u044e\u0449\u0438\u0439 \u0441\u0438\u043c\u043c\u0435\u0442\u0440\u0438\u0447\u043d\u044b\u0439 \u043a\u0440\u0438\u043f\u0442\u043e\u0433\u0440\u0430\u0444\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0438\u0437\u043e\u043b\u044f\u0442\u043e\u0440, \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u044b\u0439 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