A autoridade certificadora sem fins lucrativos Let's Encrypt, controlada pela comunidade e que oferece certificados gratuitamente a todos que desejam, decidiu interromper o suporte ao protocolo OCSP (Online Certificate Status Protocol), usado para verificar a revoga\u00e7\u00e3o de certificados. Em vez do protocolo OCSP, recomenda-se o uso de listas de certificados revogados (CRL - Certificate Revocation List), publicadas pelo servi\u00e7o Let's Encrypt a partir de 2022. Em 7 de maio de 2025, Let's Encrypt desativar\u00e1 a adi\u00e7\u00e3o de links para endere\u00e7os OCSP nos certificados emitidos e deixar\u00e1 de processar solicita\u00e7\u00f5es relacionadas ao uso da extens\u00e3o \"OCSP Must Staple\". Em 6 de agosto de 2025, os manipuladores de solicita\u00e7\u00f5es OCSP ser\u00e3o desativados nos servidores. <\/p>\n
Como motivo para a interrup\u00e7\u00e3o do suporte ao OCSP, menciona-se a preocupa\u00e7\u00e3o com a privacidade. O uso do OCSP leva a que, a cada instala\u00e7\u00e3o de uma conex\u00e3o segura para verificar a validade do certificado, o sistema do cliente envie uma solicita\u00e7\u00e3o ao servidor OCSP da autoridade certificadora que gerou o certificado. Em resposta, o servidor fornece informa\u00e7\u00f5es sobre se o certificado especificado pode ser confi\u00e1vel. O problema \u00e9 que a autoridade certificadora obt\u00e9m informa\u00e7\u00f5es sobre quando e quais sites o usu\u00e1rio visita, vinculadas ao seu endere\u00e7o IP<\/a>, o que pode ser considerado como uma vazamento de dados confidenciais. Al\u00e9m disso, o uso do OCSP leva a uma demora no processamento da solicita\u00e7\u00e3o, requerendo que o usu\u00e1rio tenha acesso garantido \u00e0 rede e cria uma depend\u00eancia do funcionamento ininterrupto dos servidores OCSP. <\/p>\n Para resolver problemas de privacidade na verifica\u00e7\u00e3o da revoga\u00e7\u00e3o de certificados, foi desenvolvida a tecnologia OCSP Stapling, cuja ess\u00eancia \u00e9 que as respostas OCSP assinadas pela autoridade certificadora podem ser transmitidas pelos servidores que hospedam os sites durante o estabelecimento da conex\u00e3o TLS com o cliente (a transmiss\u00e3o das informa\u00e7\u00f5es OCSP \u00e9 transferida para servidores<\/a> os sites, o que elimina a necessidade do sistema do cliente fazer uma solicita\u00e7\u00e3o direta ao servidor OCSP da autoridade certificadora, sendo a corre\u00e7\u00e3o das respostas garantida pela assinatura digital da autoridade certificadora). <\/p>\n Al\u00e9m do OCSP Stapling, existe uma extens\u00e3o adicionada aos certificados chamada \"OCSP Must Staple\", que exige que os navegadores utilizem a t\u00e9cnica OCSP Stapling em vez de se conectar diretamente aos servidores OCSP e exige que o certificado seja considerado n\u00e3o confi\u00e1vel caso o servidor atendente n\u00e3o retorne uma resposta OCSP assinada. Infelizmente, a extens\u00e3o \"Must Staple\" n\u00e3o ganhou ampla ado\u00e7\u00e3o nos navegadores, e a tecnologia OCSP Stapling depende da necessidade de ativa\u00e7\u00e3o expl\u00edcita do suporte no servidor HTTP (no nginx, \u00e9 suportada desde 2013). <\/p>\n Ao usar CRL, a verifica\u00e7\u00e3o de revoga\u00e7\u00e3o de certificados \u00e9 realizada no sistema local com listas formadas pela autoridade certificadora. As desvantagens dessa abordagem incluem o tamanho muito grande dos dados transferidos e a ocorr\u00eancia de um atraso tempor\u00e1rio na atualiza\u00e7\u00e3o das informa\u00e7\u00f5es (por exemplo, no Firefox, os dados s\u00e3o atualizados a cada 6 horas). O problema do tamanho foi resolvido em navegadores por meio do proxy de CRL em servidores dos fabricantes de navegadores - o pacote do navegador inclui o CRL b\u00e1sico, que \u00e9 periodicamente sincronizado com a lista atual durante o funcionamento (apenas dados alterados s\u00e3o transmitidos ao sistema do cliente). Para reduzir o tamanho do banco de dados com CRL, \u00e9 aplicada a estrutura probabil\u00edstica \"filtro de Bloom\", que permite armazenar toda a base de CRL do lado do cliente em uma representa\u00e7\u00e3o muito compacta. No Firefox, essa t\u00e9cnica \u00e9 implementada usando a ferramenta CRLite, e no Chrome - CRLSets. \u041d\u0435\u043a\u043e\u043c\u043c\u0435\u0440\u0447\u0435\u0441\u043a\u0438\u0439 \u0443\u0434\u043e\u0441\u0442\u043e\u0432\u0435\u0440\u044f\u044e\u0449\u0438\u0439 \u0446\u0435\u043d\u0442\u0440 Let’s Encrypt, \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u0438\u0440\u0443\u0435\u043c\u044b\u0439 \u0441\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e\u043c \u0438 \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0438\u0439 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u044b \u0431\u0435\u0437\u0432\u043e\u0437\u043c\u0435\u0437\u0434\u043d\u043e \u0432\u0441\u0435\u043c \u0436\u0435\u043b\u0430\u044e\u0449\u0438\u043c, \u043f\u0440\u0438\u043d\u044f\u043b \u0440\u0435\u0448\u0435\u043d\u0438\u0435 \u043f\u0440\u0435\u043a\u0440\u0430\u0442\u0438\u0442\u044c \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0443 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 OCSP (Online Certificate Status Protocol), \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u0433\u043e \u0434\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u043e\u0442\u0437\u044b\u0432\u0430 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0432. \u0412\u043c\u0435\u0441\u0442\u043e \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 OCSP \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u0435\u0442\u0441\u044f \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0441\u043f\u0438\u0441\u043a\u0438 \u043e\u0442\u043e\u0437\u0432\u0430\u043d\u043d\u044b\u0445 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0432 (CRL — Certificate Revocation List), \u043f\u0443\u0431\u043b\u0438\u043a\u0443\u0435\u043c\u044b\u0435 \u0441\u0435\u0440\u0432\u0438\u0441\u043e\u043c Let’s Encrypt \u043d\u0430\u0447\u0438\u043d\u0430\u044f \u0441 2022 \u0433\u043e\u0434\u0430. 7 \u043c\u0430\u044f 2025 \u0433\u043e\u0434\u0430 Let’s Encrypt […]<\/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-120904","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\udd47Let's Encrypt descontinua suporte ao protocolo OCSP para verifica\u00e7\u00e3o de certificados revogados | ProHoster","description":"A autoridade certificadora sem fins lucrativos Let's Encrypt, controlada pela comunidade e que fornece certificados gratuitamente a todos que desejam, decidiu descontinuar o suporte ao protocolo OCSP (Online Certificate Status).","canonical_url":"https:\/\/prohoster.info\/pt\/blog\/news\/lets-encrypt-prekrashhaet-podderzhku-protokola-ocsp-dlya-proverki-otozvannyh-sertifikatov","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"pt_PT","og:site_name":"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","og:type":"article","og:title":"\ud83e\udd47Let's Encrypt \u043f\u0440\u0435\u043a\u0440\u0430\u0449\u0430\u0435\u0442 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0443 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 OCSP \u0434\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u043e\u0442\u043e\u0437\u0432\u0430\u043d\u043d\u044b\u0445 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Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"