{"id":55092,"date":"2020-01-12T00:00:00","date_gmt":"2020-01-11T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/dostupna-kriptograficheskaya-hesh-funktsiya-blake3-kotoraya-v-10-raz-bystree-sha-2"},"modified":"2020-02-18T14:03:10","modified_gmt":"2020-02-18T11:03:10","slug":"dostupna-kriptograficheskaya-hesh-funktsiya-blake3-kotoraya-v-10-raz-bystree-sha-2","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/dostupna-kriptograficheskaya-hesh-funktsiya-blake3-kotoraya-v-10-raz-bystree-sha-2","title":{"rendered":"Dostupn\u00e1 kryptografick\u00e1 hash funkcia BLAKE3, ktor\u00e1 je 10-kr\u00e1t r\u00fdchlej\u0161ia ako SHA-2","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Bola zverejnen\u00e1 fin\u00e1lna implement\u00e1cia algoritmu <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/BLAKE3-team\/BLAKE3\">BLAKE3<\/a><\/noindex>, ktor\u00fd pon\u00faka kryptografick\u00fa hashovaciu funkciu, ur\u010den\u00fa pre pou\u017eitia ako kontrola integrity s\u00faborov, autentifik\u00e1cia spr\u00e1v a generovanie \u00fadajov pre digit\u00e1lne podpisy. BLAKE3 nie je ur\u010den\u00e1 na hashovanie hesiel (na hesl\u00e1 je potrebn\u00e9 pou\u017ei\u0165 yescrypt, bcrypt, scrypt alebo Argon2), preto\u017ee sa zameriava na maxim\u00e1lne r\u00fdchle v\u00fdpo\u010dty hashov s garanciou absencie kol\u00edzi\u00ed, ochranou proti <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%90%D1%82%D0%B0%D0%BA%D0%B0_%D0%BD%D0%B0%D1%85%D0%BE%D0%B6%D0%B4%D0%B5%D0%BD%D0%B8%D1%8F_%D0%BF%D1%80%D0%BE%D0%BE%D0%B1%D1%80%D0%B0%D0%B7%D0%B0\">n\u00e1jdeniu preimage<\/a><\/noindex> a nie je citliv\u00e1 na ve\u013ekos\u0165 hashovan\u00fdch \u00fadajov. Referen\u010dn\u00e1 implement\u00e1cia BLAKE3 <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/BLAKE3-team\/BLAKE3\">bola publikovan\u00e1<\/a><\/noindex> pod dvojitou licenciou \u2014 verejn\u00e9 vlastn\u00edctvo (CC0) a Apache 2.0.<\/p>\n<p>K\u013e\u00fa\u010dov\u00fdm rozdielom novej ha\u0161ovacej funkcie je ve\u013emi vysok\u00fd v\u00fdkon pri v\u00fdpo\u010dte ha\u0161ov pri zachovan\u00ed spo\u013eahlivosti na \u00farovni SHA-3. Predvolen\u00e1 ve\u013ekos\u0165 v\u00fdsledn\u00e9ho ha\u0161u v BLAKE3 je 32 bajtov (256 bitov), ale m\u00f4\u017ee by\u0165 roz\u0161\u00edren\u00e1 na \u013eubovo\u013en\u00e9 hodnoty. V teste na generovanie ha\u0161u pre s\u00fabor s ve\u013ekos\u0165ou 16 KB, BLAKE3 prekon\u00e1va SHA3-256 15-n\u00e1sobne, SHA-256 12-n\u00e1sobne, SHA-512 8-n\u00e1sobne, SHA-1 6-n\u00e1sobne a BLAKE2b 4-n\u00e1sobne. V\u00fdznamn\u00fd n\u00e1skok sa zachov\u00e1va aj pri spracovan\u00ed ve\u013emi ve\u013ek\u00fdch objemov d\u00e1t, napr\u00edklad, BLAKE3 sa uk\u00e1zal <noindex><a rel=\"nofollow\" href=\"https:\/\/nextjournal.com\/mk\/BLAKE3\">r\u00fdchlej\u0161ie<\/a><\/noindex> SHA-256 8-n\u00e1sobne pri v\u00fdpo\u010dte hashov pre 1 GB n\u00e1hodn\u00fdch \u00fadajov.<\/p>\n<p><center><noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/pics_base\/0_1578813226.png\"><img decoding=\"async\" alt=\"Dostupn\u00e1 kryptografick\u00e1 hash funkcia BLAKE3, ktor\u00e1 je 10-kr\u00e1t r\u00fdchlej\u0161ia ako SHA-2\" src=\"\/wp-content\/uploads\/2020\/01\/b9b93630e080b4d6c9d3285d36017966.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Algoritmus vyvinuli zn\u00e1mi odborn\u00edci na kryptografiu (<noindex><a rel=\"nofollow\" href=\"https:\/\/iohk.io\/en\/team\/john-oconnor\">Jack O'Connor<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/aumasson.jp\/\">Jean-Philippe Aumasson<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/twitter.com\/sevenps?lang=en\">Samuel Neves<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Zooko_Wilcox-O%27Hearn\">Zooko Wilcox-O'Hearn<\/a><\/noindex>) a pokra\u010duje vo v\u00fdvoji algoritmu <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=35676\">BLAKE2<\/a><\/noindex> a na k\u00f3dovanie stromu re\u0165azcov blokov vyu\u017e\u00edva mechanizmus <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/oconnor663\/bao\/blob\/ae247d2aff286dfe0a31d41b6afc02b263956091\/docs\/spec.md\">Bao<\/a><\/noindex>. Na rozdiel od BLAKE2 (BLAKE2b, BLAKE2s) pon\u00faka BLAKE3 pre v\u0161etky platformy jednotn\u00fd algoritmus, ktor\u00fd nie je viazan\u00fd na presnos\u0165 a ve\u013ekos\u0165 hash. <\/p>\n<p>Zv\u00fd\u0161enie v\u00fdkonu sa podarilo dosiahnu\u0165 zn\u00ed\u017een\u00edm po\u010dtu k\u00f4l z 10 na 7 a oddelen\u00fdm hashovan\u00edm blokov po \u010dastiach po 1 KB. Pod\u013ea vyjadrenia tvorcov na\u0161li presved\u010div\u00e9 <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/BLAKE3-team\/BLAKE3-specs\/blob\/master\/blake3.pdf\">d\u00f4kazy<\/a><\/noindex>, \u017ee je mo\u017en\u00e9 ob\u00eds\u0165 7 kolami namiesto 10 pri zachovan\u00ed tej istej \u00farovne spo\u013eahlivosti (na ilustr\u00e1ciu mo\u017eno uvies\u0165 pr\u00edklad s mie\u0161an\u00edm ovocia v mix\u00e9ri \u2014 po 7 sekund\u00e1ch je ovocie u\u017e \u00faplne premie\u0161an\u00e9 a \u010fal\u0161ie 3 sekundy neovplyvnia konzistenciu zmesi). Pri tom niektor\u00ed v\u00fdskumn\u00edci vyjadruj\u00fa pochybnosti, domnievaj\u00fac sa, \u017ee aj ke\u010f je v s\u00fa\u010dasnosti 7 k\u00f4l dostato\u010dn\u00fdch na odol\u00e1vanie v\u0161etk\u00fdm zn\u00e1mych \u00fatokom na ha\u0161e, \u010fal\u0161ie 3 kol\u00e1 m\u00f4\u017eu by\u0165 u\u017eito\u010dn\u00e9 v pr\u00edpade zistenia nov\u00fdch \u00fatokov v bud\u00facnosti. <\/p>\n<p>\u010co sa t\u00fdka delenia na bloky, v BLAKE3 sa pr\u00fad rozde\u013euje na k\u00fasky po 1 kB a ka\u017ed\u00fd k\u00fasok sa hashuj\u00fa nez\u00e1visle. Na z\u00e1klade hashov k\u00faskov sa vytv\u00e1ra <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%94%D0%B5%D1%80%D0%B5%D0%B2%D0%BE_%D1%85%D0%B5%D1%88%D0%B5%D0%B9\">bin\u00e1rneho stromu Merkle<\/a><\/noindex> formuje sa jeden ve\u013ek\u00fd ha\u0161. Uveden\u00e9 rozdelenie umo\u017e\u0148uje vyrie\u0161i\u0165 probl\u00e9m s paraleliz\u00e1ciou spracovania d\u00e1t pri v\u00fdpo\u010dte ha\u0161u \u2014 napr\u00edklad je mo\u017en\u00e9 pou\u017ei\u0165 4-vl\u00e1knov\u00e9 SIMD-in\u0161trukcie na s\u00fa\u010dasn\u00e9 vypo\u010d\u00edtavanie ha\u0161ov 4 blokov. Tradi\u010dn\u00e9 ha\u0161ovacie funkcie SHA-* spracov\u00e1vaj\u00fa d\u00e1ta sekven\u010dne. <\/p>\n<p>Vlastnosti BLAKE3:<\/p>\n<ul>\n<li class=\"l\"> Vysok\u00fd v\u00fdkon;\n<li class=\"l\"> Bezpe\u010dnos\u0165, vr\u00e1tane odolnosti vo\u010di <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%90%D1%82%D0%B0%D0%BA%D0%B0_%D1%83%D0%B4%D0%BB%D0%B8%D0%BD%D0%B5%D0%BD%D0%B8%D0%B5%D0%BC_%D1%81%D0%BE%D0%BE%D0%B1%D1%89%D0%B5%D0%BD%D0%B8%D1%8F\">\u00fatoku na pred\u013a\u017eenie spr\u00e1vy<\/a><\/noindex>, ktor\u00e9mu je vystaven\u00fd SHA-2;\n<li class=\"l\"> Zabezpe\u010denie paraleliz\u00e1cie v\u00fdpo\u010dtov na ak\u00fdko\u013evek po\u010det vl\u00e1kien a SIMD kan\u00e1lov;\n<li class=\"l\"> Mo\u017enos\u0165 inkrement\u00e1lneho aktualizovania a verifikovanej spr\u00e1vy pr\u00fadov;\n<li class=\"l\"> Pou\u017eitie v re\u017eimoch PRF, MAC, KDF, XOF a ako be\u017en\u00fd hash;\n<li class=\"l\"> Jednoduch\u00fd algoritmus pre v\u0161etky architekt\u00fary, r\u00fdchly ako na syst\u00e9moch x86-64, tak aj na 32-bitov\u00fdch procesoroch ARM.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Zdroj: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52173\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430 \u0444\u0438\u043d\u0430\u043b\u044c\u043d\u0430\u044f \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u0430 BLAKE3, \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u044e\u0449\u0435\u0433\u043e \u043a\u0440\u0438\u043f\u0442\u043e\u0433\u0440\u0430\u0444\u0438\u0447\u0435\u0441\u043a\u0443\u044e \u0445\u0435\u0448-\u0444\u0443\u043d\u043a\u0446\u0438\u044e, \u0440\u0430\u0441\u0441\u0447\u0438\u0442\u0430\u043d\u043d\u0443\u044e \u043d\u0430 \u0442\u0430\u043a\u0438\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f, \u043a\u0430\u043a \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0430 \u0446\u0435\u043b\u043e\u0441\u0442\u043d\u043e\u0441\u0442\u0438 \u0444\u0430\u0439\u043b\u043e\u0432, \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u0439 \u0438 \u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0434\u0430\u043d\u043d\u044b\u0445 \u0434\u043b\u044f \u0446\u0438\u0444\u0440\u043e\u0432\u044b\u0445 \u043f\u043e\u0434\u043f\u0438\u0441\u0435\u0439. BLAKE3 \u043d\u0435 \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u0430 \u0434\u043b\u044f \u0445\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043f\u0430\u0440\u043e\u043b\u0435\u0439 (\u0434\u043b\u044f \u043f\u0430\u0440\u043e\u043b\u0435\u0439 \u043d\u0443\u0436\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c yescrypt, bcrypt, scrypt \u0438\u043b\u0438 Argon2), \u0442\u0430\u043a \u043a\u0430\u043a \u043d\u0430\u0446\u0435\u043b\u0435\u043d\u0430 \u043d\u0430 \u043c\u0430\u043a\u0441\u0438\u043c\u0430\u043b\u044c\u043d\u043e \u0431\u044b\u0441\u0442\u0440\u043e\u0435 \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0435 \u0445\u044d\u0448\u0435\u0439 \u0441 \u0433\u0430\u0440\u0430\u043d\u0442\u0438\u0435\u0439 \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u044f \u043a\u043e\u043b\u043b\u0438\u0437\u0438\u0439, \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 \u043d\u0430\u0445\u043e\u0436\u0434\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u043e\u0431\u0440\u0430\u0437\u0430 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":55093,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-55092","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430 \u0444\u0438\u043d\u0430\u043b\u044c\u043d\u0430\u044f \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u0430 BLAKE3, \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u044e\u0449\u0435\u0433\u043e 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\u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47\u0414\u043e\u0441\u0442\u0443\u043f\u043d\u0430 \u043a\u0440\u0438\u043f\u0442\u043e\u0433\u0440\u0430\u0444\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0445\u0435\u0448-\u0444\u0443\u043d\u043a\u0446\u0438\u044f BLAKE3, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0432 10 \u0440\u0430\u0437 \u0431\u044b\u0441\u0442\u0440\u0435\u0435 SHA-2 | ProHoster\" \/>\n\t\t<meta property=\"og:description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430 \u0444\u0438\u043d\u0430\u043b\u044c\u043d\u0430\u044f \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u0430 BLAKE3, 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