{"id":100468,"date":"2021-06-08T10:22:35","date_gmt":"2021-06-08T08:22:35","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-fedora-35-namechen-perehod-na-yescrypt-dlya-heshirovaniya-parolej"},"modified":"2021-06-08T10:22:35","modified_gmt":"2021-06-08T08:22:35","slug":"v-fedora-35-namechen-perehod-na-yescrypt-dlya-heshirovaniya-parolej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/v-fedora-35-namechen-perehod-na-yescrypt-dlya-heshirovaniya-parolej","title":{"rendered":"No Fedora 35 est\u00e1 previsto a transi\u00e7\u00e3o para yescrypt para hash de senhas","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Para implementa\u00e7\u00e3o no Fedora 35, est\u00e1 previsto a transi\u00e7\u00e3o para o uso do esquema de hash de senhas yescrypt. A mudan\u00e7a ainda n\u00e3o foi analisada pelo comit\u00ea FESCo (Fedora Engineering Steering Committee), que \u00e9 respons\u00e1vel pela parte t\u00e9cnica do desenvolvimento da distribui\u00e7\u00e3o Fedora. Se a mudan\u00e7a for aprovada, a partir do Fedora 35, senhas para novos usu\u00e1rios em \/etc\/shadow ser\u00e3o, por padr\u00e3o, hashadas usando yescrypt. O suporte para hashes antigos, criados com o algoritmo sha512crypt previamente usado, ser\u00e1 mantido e dispon\u00edvel como uma op\u00e7\u00e3o. Entre as distribui\u00e7\u00f5es que j\u00e1 migraram para yescrypt est\u00e3o ALT Linux, Debian Testing e Kali Linux.    <\/p>\n<p>Yescrypt amplia as capacidades do cl\u00e1ssico scrypt com suporte para o uso de esquemas com maior consumo de RAM e reduz a efic\u00e1cia de ataques que utilizam GPU, FPGA e chips especializados. A seguran\u00e7a do Yescrypt \u00e9 garantida pelo uso de primitivas criptogr\u00e1ficas j\u00e1 testadas como SHA-256, HMAC e PBKDF2.     <\/p>\n<p>Entre os desvantagens do algoritmo sha512crypt utilizado no Fedora, destaca-se a efic\u00e1cia apenas quando o tamanho do salt ultrapassa 90 bits (recomendado um m\u00ednimo de 128 bits); a vulnerabilidade a ataques de DoS atrav\u00e9s da cria\u00e7\u00e3o de carga parasit\u00e1ria na CPU ao hash de senhas longas; a vulnerabilidade a ataques que determinam o tamanho da senha com base na an\u00e1lise passiva do tempo de processamento do hash; e a opera\u00e7\u00e3o sem a aplica\u00e7\u00e3o da fun\u00e7\u00e3o criptogr\u00e1fica de deriva\u00e7\u00e3o de chave (KDF, key derivation function).<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=55294\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u043b\u044f \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0432 Fedora 35 \u043d\u0430\u043c\u0435\u0447\u0435\u043d \u043f\u0435\u0440\u0435\u0445\u043e\u0434 \u043d\u0430 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0441\u0445\u0435\u043c\u044b \u0445\u0435\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043f\u0430\u0440\u043e\u043b\u0435\u0439 yescrypt. \u0418\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0435 \u043f\u043e\u043a\u0430 \u043d\u0435 \u0440\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0435\u043d\u043e \u043a\u043e\u043c\u0438\u0442\u0435\u0442\u043e\u043c FESCo (Fedora Engineering Steering Committee), \u043e\u0442\u0432\u0435\u0447\u0430\u044e\u0449\u0438\u043c \u0437\u0430 \u0442\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u0443\u044e \u0447\u0430\u0441\u0442\u044c \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432\u0430 Fedora. \u0412 \u0441\u043b\u0443\u0447\u0430\u0435 \u043e\u0434\u043e\u0431\u0440\u0435\u043d\u0438\u044f \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u043d\u0430\u0447\u0438\u043d\u0430\u044f \u0441 Fedora 35 \u043f\u0430\u0440\u043e\u043b\u0438 \u0434\u043b\u044f \u043d\u043e\u0432\u044b\u0445 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 \u0432 \/etc\/shadow \u0431\u0443\u0434\u0443\u0442 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0445\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u0442\u0441\u044f \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 yescrypt. \u041f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u0441\u0442\u0430\u0440\u044b\u0445 \u0445\u044d\u0448\u0435\u0439, \u0441\u043e\u0437\u0434\u0430\u043d\u043d\u044b\u0445 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-100468","post","type-post","status-publish","format-standard","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=\"\u0414\u043b\u044f \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0432 Fedora 35 \u043d\u0430\u043c\u0435\u0447\u0435\u043d \u043f\u0435\u0440\u0435\u0445\u043e\u0434 \u043d\u0430 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0441\u0445\u0435\u043c\u044b \u0445\u0435\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043f\u0430\u0440\u043e\u043b\u0435\u0439 yescrypt.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" 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