{"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\/hu\/blog\/news\/dostupna-kriptograficheskaya-hesh-funktsiya-blake3-kotoraya-v-10-raz-bystree-sha-2","title":{"rendered":"El\u00e9rhet\u0151 a BLAKE3 kriptogr\u00e1fiai hash-funkci\u00f3, amely t\u00edzszer gyorsabb a SHA-2-n\u00e9l","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Megjelent a v\u00e9gleges algoritmus megval\u00f3s\u00edt\u00e1sa <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/BLAKE3-team\/BLAKE3\">BLAKE3<\/a><\/noindex>, amely egy kriptogr\u00e1fiai hash-funkci\u00f3t javasol az olyan alkalmaz\u00e1sokhoz, mint a f\u00e1jlok integrit\u00e1s\u00e1nak ellen\u0151rz\u00e9se, \u00fczenetek hiteles\u00edt\u00e9se \u00e9s digit\u00e1lis al\u00e1\u00edr\u00e1sok l\u00e9trehoz\u00e1sa. A BLAKE3 nem alkalmas jelszavak hash-el\u00e9s\u00e9re (a jelszavakhoz yescrypt, bcrypt, scrypt vagy Argon2 haszn\u00e1lata aj\u00e1nlott), mivel arra \u00f6sszpontos\u00edt, hogy garant\u00e1ltan gyors hash-el\u00e9st v\u00e9gezzen \u00fctk\u00f6z\u00e9sek n\u00e9lk\u00fcli v\u00e9delemmel, \u00e9s v\u00e9delmet ny\u00fajt <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\">az el\u0151k\u00e9p megtal\u00e1l\u00e1s\u00e1t\u00f3l<\/a><\/noindex> \u00e9s nem \u00e9rz\u00e9keny a hash-elt adatok m\u00e9ret\u00e9re. A BLAKE3 referenciamegval\u00f3s\u00edt\u00e1sa <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/BLAKE3-team\/BLAKE3\">kiad\u00e1sra ker\u00fclt<\/a><\/noindex> dupla licensz alatt \u2014 k\u00f6zkinccs\u00e9 v\u00e1lt (CC0) \u00e9s Apache 2.0.<\/p>\n<p>Az \u00faj hash-funkci\u00f3 kulcsfontoss\u00e1g\u00fa jellemz\u0151je a rendk\u00edv\u00fcl magas hashel\u00e9si teljes\u00edtm\u00e9ny, amely meg\u0151rzi a megb\u00edzhat\u00f3s\u00e1got a SHA-3 szintj\u00e9n. Alap\u00e9rtelmez\u00e9s szerint a BLAKE3 eredm\u00e9ny hash m\u00e9rete 32 b\u00e1jt (256 bit), de tetsz\u0151legesen b\u0151v\u00edthet\u0151. Egy 16 KB-os f\u00e1jl hash-gener\u00e1l\u00e1si tesztj\u00e9ben a BLAKE3 15-sz\u00f6r gyorsabb a SHA3-256-hoz k\u00e9pest, 12-szer a SHA-256-hoz, 8-szor a SHA-512-h\u00f6z, 6-szor a SHA-1-hez, m\u00edg a BLAKE2b-hez k\u00e9pest 4-szer. Jelent\u0151s el\u0151ny megmarad nagyon nagy adatmennyis\u00e9gek feldolgoz\u00e1sakor is, p\u00e9ld\u00e1ul a BLAKE3 eset\u00e9ben. <noindex><a rel=\"nofollow\" href=\"https:\/\/nextjournal.com\/mk\/BLAKE3\">gyorsabb<\/a><\/noindex> SHA-256-n\u00e1l 8-szor gyorsabb volt 1 GB v\u00e9letlenszer\u0171 adatok hash-el\u00e9sekor.<\/p>\n<p><center><noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/pics_base\/0_1578813226.png\"><img decoding=\"async\" alt=\"El\u00e9rhet\u0151 a BLAKE3 kriptogr\u00e1fiai hash-funkci\u00f3, amely t\u00edzszer gyorsabb a SHA-2-n\u00e9l\" src=\"\/wp-content\/uploads\/2020\/01\/b9b93630e080b4d6c9d3285d36017966.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Az algoritmust neves kriptogr\u00e1fiai szakemberek fejlesztett\u00e9k ki (<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>) \u00e9s az algoritmus fejl\u0151d\u00e9se folytat\u00f3dik <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=35676\">BLAKE2<\/a><\/noindex> \u00e9s a blokkl\u00e1ncok l\u00e1ncf\u00e1jt k\u00f3dol\u00f3 mechanizmust alkalmaz <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/oconnor663\/bao\/blob\/ae247d2aff286dfe0a31d41b6afc02b263956091\/docs\/spec.md\">Bao<\/a><\/noindex>. A BLAKE2-vel (BLAKE2b, BLAKE2s) ellent\u00e9tben a BLAKE3 minden platform sz\u00e1m\u00e1ra egys\u00e9ges algoritmust javasol, amely f\u00fcggetlen a bitm\u00e9rett\u0151l \u00e9s a hash m\u00e9ret\u00e9t\u0151l. <\/p>\n<p>A teljes\u00edtm\u00e9ny n\u00f6vel\u00e9s\u00e9t a kerekek sz\u00e1m\u00e1nak cs\u00f6kkent\u00e9s\u00e9vel \u00e9rt\u00e9k el 10-r\u0151l 7-re, \u00e9s a blokkok 1 KB-os darabokban t\u00f6rt\u00e9n\u0151 k\u00fcl\u00f6n hash-el\u00e9s\u00e9vel. A k\u00e9sz\u00edt\u0151k szerint meggy\u0151z\u0151 <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/BLAKE3-team\/BLAKE3-specs\/blob\/master\/blake3.pdf\">bizony\u00edt\u00e9kot tal\u00e1ltak<\/a><\/noindex>, hogy 7 k\u00f6r is elegend\u0151 lehet a megb\u00edzhat\u00f3s\u00e1g ugyanazon szintj\u00e9nek meg\u0151rz\u00e9s\u00e9vel (vizu\u00e1lis p\u00e9ldak\u00e9nt hozhat\u00f3 fel a gy\u00fcm\u00f6lcs\u00f6k turmixg\u00e9pben val\u00f3 kever\u00e9se \u2014 7 m\u00e1sodperc ut\u00e1n a gy\u00fcm\u00f6lcs\u00f6k m\u00e1r teljesen \u00f6ssze vannak keverve, \u00e9s a tov\u00e1bbi 3 m\u00e1sodperc nem befoly\u00e1solja a kever\u00e9k konzisztenci\u00e1j\u00e1t). E k\u00f6zben egyes kutat\u00f3k k\u00e9ts\u00e9gbe vonj\u00e1k, hogy m\u00e9g ha a j\u00f6v\u0151ben a 7 k\u00f6r elegend\u0151 a hash-t\u00e1mad\u00e1sokkal val\u00f3 szemben\u00e9z\u00e9sre, a tov\u00e1bbi 3 k\u00f6r hasznos lehet, ha \u00faj t\u00e1mad\u00e1sok ker\u00fclnek el\u0151t\u00e9rbe. <\/p>\n<p>A blokkokra t\u00f6rt\u00e9n\u0151 feloszt\u00e1s tekintet\u00e9ben a BLAKE3 folyamata 1 KB-os darabokra oszt\u00f3dik, \u00e9s minden darabot f\u00fcggetlen\u00fcl hash-elnek. A darabok hash-ei alapj\u00e1n <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\">Merkle-binares f\u00e1nak<\/a><\/noindex> egy nagy hash k\u00e9pz\u0151dik. A megadott feloszt\u00e1s lehet\u0151v\u00e9 teszi a hash kisz\u00e1m\u00edt\u00e1s\u00e1nak p\u00e1rhuzamos feldolgoz\u00e1si probl\u00e9m\u00e1j\u00e1nak megold\u00e1s\u00e1t \u2014 p\u00e9ld\u00e1ul n\u00e9gy sz\u00e1las SIMD utas\u00edt\u00e1sokat lehet haszn\u00e1lni n\u00e9gy blokk hash-einek egyidej\u0171 kisz\u00e1m\u00edt\u00e1s\u00e1ra. A hagyom\u00e1nyos SHA-* hash-funkci\u00f3k sorozatosan dolgozz\u00e1k fel az adatokat. <\/p>\n<p>A BLAKE3 jellemz\u0151i:<\/p>\n<ul>\n<li class=\"l\"> Magas teljes\u00edtm\u00e9ny;\n<li class=\"l\"> Biztons\u00e1g, bele\u00e9rtve az \u00fczenetsz\u00e9les\u00edt\u00e9ssel szembeni ellen\u00e1ll\u00e1st, <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\">amelynek a SHA-2 van kit\u00e9ve;<\/a><\/noindex>, biztos\u00edtva a sz\u00e1m\u00edt\u00e1sok p\u00e1rhuzamos\u00edt\u00e1s\u00e1t tetsz\u0151leges sz\u00e1m\u00fa sz\u00e1lra \u00e9s SIMD-csatorn\u00e1ra;\n<li class=\"l\"> Haszn\u00e1lat PRF, MAC, KDF, XOF m\u00f3dokban \u00e9s mint hagyom\u00e1nyos hash;\n<li class=\"l\"> Lehet\u0151s\u00e9g inkrement\u00e1lis friss\u00edt\u00e9sre \u00e9s \u00e9rv\u00e9nyes\u00edtett adatfolyamok feldolgoz\u00e1s\u00e1ra;\n<li class=\"l\"> Megjelent a BLAKE3 algoritmus v\u00e9gleges megval\u00f3s\u00edt\u00e1sa, amely kriptogr\u00e1fiai hash-f\u00fcggv\u00e9nyt k\u00edn\u00e1l az ilyen alkalmaz\u00e1sokhoz.\n<li class=\"l\"> Egys\u00e9ges algoritmus minden architekt\u00far\u00e1hoz, gyorsan m\u0171k\u00f6dik x86-64 rendszereken \u00e9s 32 bites ARM processzorokon is.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Forr\u00e1s: <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 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