{"id":106131,"date":"2022-12-16T15:36:53","date_gmt":"2022-12-16T13:36:53","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/nist-vyvodit-algoritm-heshirovaniya-sha-1-iz-svoih-speczifikaczij"},"modified":"2022-12-16T15:36:53","modified_gmt":"2022-12-16T13:36:53","slug":"nist-vyvodit-algoritm-heshirovaniya-sha-1-iz-svoih-speczifikaczij","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/nist-vyvodit-algoritm-heshirovaniya-sha-1-iz-svoih-speczifikaczij","title":{"rendered":"O NIST remove o algoritmo de hash SHA-1 de suas especifica\u00e7\u00f5es","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

O Instituto Nacional de Padr\u00f5es e Tecnologia dos EUA (NIST) reconheceu o algoritmo de hash como obsoleto, n\u00e3o atendendo aos requisitos de seguran\u00e7a e n\u00e3o recomendado para uso. A aplica\u00e7\u00e3o do SHA-1 dever\u00e1 ser eliminada at\u00e9 31 de dezembro de 2030, com uma transi\u00e7\u00e3o completa para algoritmos mais seguros como SHA-2 e SHA-3. <\/p>\n

At\u00e9 31 de dezembro de 2030, a aplica\u00e7\u00e3o do SHA-1 ser\u00e1 encerrada em todas as especifica\u00e7\u00f5es e protocolos atuais do NIST. O t\u00e9rmino da especifica\u00e7\u00e3o do SHA-1 ser\u00e1 refletido em um novo padr\u00e3o federal FIPS 180-5. Al\u00e9m disso, mudan\u00e7as ser\u00e3o feitas em especifica\u00e7\u00f5es relacionadas, como SP 800-131A, removendo todas as men\u00e7\u00f5es ao SHA-1. M\u00f3dulos criptogr\u00e1ficos que suportam SHA-1 n\u00e3o poder\u00e3o passar pela revis\u00e3o de conformidade do NIST, e seu fornecimento a institui\u00e7\u00f5es governamentais dos EUA se tornar\u00e1 imposs\u00edvel (o certificado \u00e9 concedido por cinco anos, ap\u00f3s os quais uma nova verifica\u00e7\u00e3o \u00e9 necess\u00e1ria). <\/p>\n

O SHA-1 foi desenvolvido em 1995 e aprovado como padr\u00e3o federal para tratamento de informa\u00e7\u00f5es (FIPS 180-1), permitindo o uso deste algoritmo em institui\u00e7\u00f5es governamentais dos EUA. Em 2005, a possibilidade te\u00f3rica de ataque ao SHA-1 foi comprovada. Em 2017, foi demonstrado o primeiro ataque pr\u00e1tico de colis\u00e3o com prefixo definido ao SHA-1, permitindo que para dois conjuntos de dados diferentes fossem encontrados complementos, cuja anexa\u00e7\u00e3o resultaria na ocorr\u00eancia de uma colis\u00e3o e na forma\u00e7\u00e3o do mesmo hash resultante (por exemplo, para dois documentos existentes, \u00e9 poss\u00edvel calcular dois complementos, e, se um for anexado ao primeiro documento e o outro ao segundo \u2014 os hashes SHA-1 resultantes para esses arquivos ser\u00e3o iguais). <\/p>\n

Em 2019, o m\u00e9todo de detec\u00e7\u00e3o de colis\u00f5es foi significativamente aprimorado e os custos para realizar um ataque foram reduzidos para algumas dezenas de mil d\u00f3lares. Em 2020, foi demonstrado um ataque funcional para criar assinaturas digitais falsas PGP e GnuPG. Desde 2011, o SHA-1 n\u00e3o \u00e9 recomendado para utiliza\u00e7\u00e3o em assinaturas digitais, e em 2017 todos os principais navegadores web interromperam o suporte a certificados assinados utilizando o algoritmo de hash SHA-1. No entanto, o SHA-1 continua a ser utilizado para somas de verifica\u00e7\u00e3o e na base de dados do NIST existem mais de 2200 m\u00f3dulos e bibliotecas criptogr\u00e1ficas certificados com suporte a SHA-1.
\n
Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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[…]<\/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-106131","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47NIST retira o algoritmo de hash SHA-1 de suas especifica\u00e7\u00f5es | ProHoster","description":"O Instituto Nacional de Padr\u00f5es e Tecnologia dos EUA (NIST) reconheceu que o algoritmo de hash est\u00e1 obsoleto, n\u00e3o atende aos requisitos de seguran\u00e7a e n\u00e3o \u00e9 recomendado para 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