{"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\/cs\/blog\/news\/dostupna-kriptograficheskaya-hesh-funktsiya-blake3-kotoraya-v-10-raz-bystree-sha-2","title":{"rendered":"K dispozici je kryptografick\u00e1 hashovac\u00ed funkce BLAKE3, kter\u00e1 je 10kr\u00e1t rychlej\u0161\u00ed ne\u017e SHA-2","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Byla zve\u0159ejn\u011bna kone\u010dn\u00e1 realizace algoritmu <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/BLAKE3-team\/BLAKE3\">BLAKE3<\/a><\/noindex>, kter\u00fd nab\u00edz\u00ed kryptografickou hash funkci ur\u010denou pro takov\u00e9 aplikace, jako je ov\u011b\u0159ov\u00e1n\u00ed integrity soubor\u016f, autentizaci zpr\u00e1v a generov\u00e1n\u00ed dat pro digit\u00e1ln\u00ed podpisy. BLAKE3 nen\u00ed ur\u010dena pro hashov\u00e1n\u00ed hesel (pro hesla je nutn\u00e9 pou\u017e\u00edt yescrypt, bcrypt, scrypt nebo Argon2), proto\u017ee se zam\u011b\u0159uje na co nejrychlej\u0161\u00ed v\u00fdpo\u010det hash\u016f s zaru\u010denou absenc\u00ed koliz\u00ed a 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\">nalezen\u00ed preimage<\/a><\/noindex> a nen\u00ed citliv\u00e1 na velikost hashovan\u00fdch dat. Referen\u010dn\u00ed implementace BLAKE3 <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/BLAKE3-team\/BLAKE3\">byla vyd\u00e1na<\/a><\/noindex> pod dvojitou licenc\u00ed \u2014 ve\u0159ejn\u00e9 vlastnictv\u00ed (CC0) a Apache 2.0.<\/p>\n<p>Kl\u00ed\u010dov\u00fdm rozd\u00edlem nov\u00e9 hashovac\u00ed funkce je velmi vysok\u00e1 v\u00fdkonnost v\u00fdpo\u010dtu hash\u016f p\u0159i zachov\u00e1n\u00ed spolehlivosti na \u00farovni SHA-3. Standardn\u011b je velikost v\u00fdsledn\u00e9ho hash v BLAKE3 32 bajt\u016f (256 bit\u016f), ale m\u016f\u017ee b\u00fdt roz\u0161\u00ed\u0159ena na libovoln\u00e9 hodnoty. V testu na generaci hashe pro soubor o velikosti 16 KB BLAKE3 p\u0159ed\u010d\u00ed SHA3-256 v 15n\u00e1sobku, SHA-256 \u2014 v 12n\u00e1sobku, SHA-512 \u2014 v 8n\u00e1sobku, SHA-1 \u2014 v 6n\u00e1sobku, a BLAKE2b \u2014 ve 4n\u00e1sobku. V\u00fdznamn\u00fd n\u00e1skok p\u0159etrv\u00e1v\u00e1 i p\u0159i zpracov\u00e1n\u00ed velmi velk\u00fdch objem\u016f dat, nap\u0159\u00edklad BLAKE3 se uk\u00e1zal <noindex><a rel=\"nofollow\" href=\"https:\/\/nextjournal.com\/mk\/BLAKE3\">rychlej\u0161\u00ed<\/a><\/noindex> SHA-256 8kr\u00e1t p\u0159i v\u00fdpo\u010dtu hash pro 1 GB n\u00e1hodn\u00fdch dat.<\/p>\n<p><center><noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/pics_base\/0_1578813226.png\"><img decoding=\"async\" alt=\"K dispozici je kryptografick\u00e1 hashovac\u00ed funkce BLAKE3, kter\u00e1 je 10kr\u00e1t rychlej\u0161\u00ed ne\u017e SHA-2\" src=\"\/wp-content\/uploads\/2020\/01\/b9b93630e080b4d6c9d3285d36017966.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Algoritmus byl vyvinut zn\u00e1m\u00fdmi specialisty na kryptografii (<noindex><a rel=\"nofollow\" href=\"https:\/\/iohk.io\/en\/team\/john-oconnor\">Jack O\u2019Connor<\/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\u2019Hearn<\/a><\/noindex>) a pokra\u010duje ve v\u00fdvoji algoritmu <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=35676\">BLAKE2<\/a><\/noindex> a aplikuje na k\u00f3dov\u00e1n\u00ed stromov\u00fdch \u0159et\u011bzc\u016f blok\u016f mechanismus <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/oconnor663\/bao\/blob\/ae247d2aff286dfe0a31d41b6afc02b263956091\/docs\/spec.md\">Bao<\/a><\/noindex>. Na rozd\u00edl od BLAKE2 (BLAKE2b, BLAKE2s) nab\u00edz\u00ed BLAKE3 jednotn\u00fd algoritmus pro v\u0161echny platformy, nez\u00e1visl\u00fd na architektu\u0159e a velikosti hash. <\/p>\n<p>Zv\u00fd\u0161en\u00ed v\u00fdkonu bylo dosa\u017eeno zkr\u00e1cen\u00edm po\u010dtu kol z 10 na 7 a odd\u011blen\u00fdm hashov\u00e1n\u00edm blok\u016f po 1 KB. Podle tvrzen\u00ed tv\u016frc\u016f na\u0161li p\u0159esv\u011bd\u010div\u00e9 <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/BLAKE3-team\/BLAKE3-specs\/blob\/master\/blake3.pdf\">d\u016fkazy<\/a><\/noindex>, \u017ee je mo\u017en\u00e9 obej\u00edt se 7 koly nam\u00edsto 10 p\u0159i zachov\u00e1n\u00ed stejn\u00e9 \u00farovn\u011b spolehlivosti (pro n\u00e1zornost lze uv\u00e9st p\u0159\u00edklad s mixov\u00e1n\u00edm ovoce v mix\u00e9ru \u2014 po 7 sekund\u00e1ch jsou ovoce ji\u017e zcela prom\u00edchan\u00e1 a dal\u0161\u00edch 3 sekundy neovlivn\u00ed konzistenci sm\u011bsi). N\u011bkte\u0159\u00ed v\u00fdzkumn\u00edci v\u0161ak vyjad\u0159uj\u00ed pochybnosti, nebo\u0165 i kdy\u017e je v sou\u010dasnosti 7 kol dostatek k odol\u00e1v\u00e1n\u00ed zn\u00e1m\u00fdm \u00fatok\u016fm na hashe, dal\u0161\u00edch 3 kola by mohla b\u00fdt u\u017eite\u010dn\u00e1 v p\u0159\u00edpad\u011b odhalen\u00ed nov\u00fdch \u00fatok\u016f v budoucnu. <\/p>\n<p>Co se t\u00fd\u010de rozd\u011blen\u00ed na bloky, tak v BLAKE3 je proud rozd\u011blen na kousky o velikosti 1 kB a ka\u017ed\u00fd kousek je hashov\u00e1n nez\u00e1visle. Na z\u00e1klad\u011b hash\u016f kus\u016f na z\u00e1klad\u011b <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\u00e1rn\u00edho Merklova stromu<\/a><\/noindex> formuje se jeden velk\u00fd hash. Uveden\u00e9 rozd\u011blen\u00ed umo\u017e\u0148uje vy\u0159e\u0161it probl\u00e9m s paralelizac\u00ed zpracov\u00e1n\u00ed dat p\u0159i v\u00fdpo\u010dtu hashe \u2014 nap\u0159\u00edklad lze pou\u017e\u00edt 4-vl\u00e1knov\u00e9 SIMD instrukce pro sou\u010dasn\u00fd v\u00fdpo\u010det hash\u016f 4 blok\u016f. Tradi\u010dn\u00ed hashovac\u00ed funkce SHA-* zpracov\u00e1vaj\u00ed data sekven\u010dn\u011b. <\/p>\n<p>Funkce BLAKE3:<\/p>\n<ul>\n<li class=\"l\"> Vysok\u00e1 v\u00fdkonnost;\n<li class=\"l\"> Bezpe\u010dnost, v\u010detn\u011b odolnosti v\u016f\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 prodlou\u017een\u00ed zpr\u00e1vy<\/a><\/noindex>, kter\u00fdmi je SHA-2 zasa\u017eeno;\n<li class=\"l\"> Zaji\u0161t\u011bn\u00ed paralelizace v\u00fdpo\u010dtu na libovoln\u00fd po\u010det vl\u00e1ken a SIMD kan\u00e1l\u016f;\n<li class=\"l\"> Mo\u017enost inkrement\u00e1ln\u00ed aktualizace a ov\u011b\u0159en\u00e9ho zpracov\u00e1n\u00ed proud\u016f;\n<li class=\"l\"> Pou\u017eit\u00ed v re\u017eimech PRF, MAC, KDF, XOF a jako b\u011b\u017en\u00fd hash;\n<li class=\"l\"> Jedin\u00fd algoritmus pro v\u0161echny architektury, rychl\u00fd jak na syst\u00e9mech x86-64, tak na 32-bitov\u00fdch procesorech 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 5.0.3 - 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 \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.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/cs\/blog\/news\/dostupna-kriptograficheskaya-hesh-funktsiya-blake3-kotoraya-v-10-raz-bystree-sha-2\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.3\" \/>\n\t\t<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \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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