{"id":101817,"date":"2021-10-27T16:23:35","date_gmt":"2021-10-27T14:23:37","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/kompaniya-intel-razvivaet-protokol-httpa-dopolnyayushhij-https"},"modified":"2021-10-27T16:23:35","modified_gmt":"2021-10-27T14:23:37","slug":"kompaniya-intel-razvivaet-protokol-httpa-dopolnyayushhij-https","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/kompaniya-intel-razvivaet-protokol-httpa-dopolnyayushhij-https","title":{"rendered":"A Intel est\u00e1 desenvolvendo o protocolo HTTPA, que complementa o HTTPS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Engenheiros da Intel propuseram um novo protocolo HTTPA (HTTPS Attestable), que expande o HTTPS com garantias adicionais de seguran\u00e7a para os c\u00e1lculos realizados. O HTTPA garante a integridade do processamento do pedido do usu\u00e1rio no servidor e assegura que o servi\u00e7o web \u00e9 confi\u00e1vel e que o c\u00f3digo executado em um ambiente TEE (Trusted Execution Environment) no servidor n\u00e3o foi alterado devido a um ataque ou sabotagem do administrador.         <\/p>\n<p>O HTTPS protege os dados transmitidos durante a transfer\u00eancia pela rede, mas n\u00e3o pode excluir a viola\u00e7\u00e3o de sua integridade como resultado de ataques ao servidor. Enclaves isolados, criados por meio de tecnologias como Intel SGX (Software Guard Extension), ARM TrustZone e AMD PSP (Platform Security Processor), oferecem a capacidade de proteger c\u00e1lculos importantes e reduzir o risco de vazamentos ou altera\u00e7\u00e3o de informa\u00e7\u00f5es confidenciais no n\u00f3 final.     <\/p>\n<p>O HTTPA, para garantir a veracidade das informa\u00e7\u00f5es transmitidas, permite o uso de ferramentas de atesta\u00e7\u00e3o fornecidas pelo Intel SGX, que confirmam a autenticidade do enclave onde os c\u00e1lculos s\u00e3o realizados. Essencialmente, o HTTPA expande o HTTPS com a possibilidade de atesta\u00e7\u00e3o remota do enclave e permite verificar que ele est\u00e1 sendo executado em um ambiente leg\u00edtimo do Intel SGX e que o servi\u00e7o web \u00e9 confi\u00e1vel. O protocolo est\u00e1 sendo desenvolvido inicialmente como um padr\u00e3o universal e pode ser implementado para outros sistemas TEE, al\u00e9m do Intel SGX.       <center><img decoding=\"async\" alt=\"A Intel est\u00e1 desenvolvendo o protocolo HTTPA, que complementa o HTTPS\" src=\"\/wp-content\/uploads\/2021\/10\/c53a2701095cfb8166a4b25d4f97c772.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/center>      <\/p>\n<p>Al\u00e9m do processo padr\u00e3o para HTTPS de instala\u00e7\u00e3o de uma conex\u00e3o segura, o HTTPA exige adicionalmente a concord\u00e2ncia sobre uma chave de sess\u00e3o confi\u00e1vel. O protocolo introduz um novo m\u00e9todo HTTP chamado &#171;ATTEST&#187;, que permite o tratamento de tr\u00eas tipos de solicita\u00e7\u00f5es e respostas:   <\/p>\n<ul>\n<li class=\"l\"> &#171;preflight&#187; para verificar se a parte remota suporta a atesta\u00e7\u00e3o de enclaves;\n<li class=\"l\"> &#171;attest&#187; para acordar os par\u00e2metros de atesta\u00e7\u00e3o (sele\u00e7\u00e3o do algoritmo criptogr\u00e1fico, troca de sequ\u00eancias aleat\u00f3rias \u00fanicas de sess\u00e3o, gera\u00e7\u00e3o de um identificador de sess\u00e3o e transmiss\u00e3o da chave p\u00fablica do enclave ao cliente);\n<li class=\"l\"> &#171;trusted session&#187; &#8212; forma\u00e7\u00e3o de uma chave de sess\u00e3o para troca confi\u00e1vel de informa\u00e7\u00f5es. A chave de sess\u00e3o \u00e9 formada com base em uma sequ\u00eancia secreta pr\u00e9-acordada anterior (pre-session secret), estabelecida pelo cliente com o uso do recebido de <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pt\/server\/dts-los-angeles\/\"   title=\"servidor\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3761\">servidor<\/a> de chave TEE, e sequ\u00eancias aleat\u00f3rias geradas por cada parte.  <\/ul>\n<p>    <center><img decoding=\"async\" alt=\"A Intel est\u00e1 desenvolvendo o protocolo HTTPA, que complementa o HTTPS\" src=\"\/wp-content\/uploads\/2021\/10\/ea155f297e7858015a5589e5989afe38.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/center>      <\/p>\n<p>HTTPA implica que o cliente \u00e9 confi\u00e1vel, enquanto o servidor n\u00e3o, ou seja, o cliente pode usar este protocolo para verificar c\u00e1lculos no ambiente TEE. No entanto, o HTTPA n\u00e3o garante que os c\u00e1lculos realizados fora do TEE n\u00e3o tenham sido comprometidos, o que requer uma abordagem separada para o desenvolvimento de servi\u00e7os web. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pt\/server\/\"   title=\"servidor web\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"761\">servidor web<\/a> Assim, o HTTPA \u00e9 principalmente direcionado para uso com servi\u00e7os especializados, que possuem requisitos elevados de integridade da informa\u00e7\u00e3o, como sistemas financeiros e de sa\u00fade.    <\/p>\n<p>Para situa\u00e7\u00f5es em que os c\u00e1lculos no TEE precisam ser confirmados tanto para o servidor quanto para o cliente, existe uma variante do protocolo mHTTPA (Mutual HTTPA), que realiza verifica\u00e7\u00e3o bidirecional. Esta variante \u00e9 mais complexa devido \u00e0 necessidade de gera\u00e7\u00e3o bidirecional de chaves de sess\u00e3o para o servidor e para o cliente.<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56050\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0418\u043d\u0436\u0435\u043d\u0435\u0440\u044b \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Intel \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0438\u043b\u0438 \u043d\u043e\u0432\u044b\u0439 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b HTTPA (HTTPS Attestable), \u0440\u0430\u0441\u0448\u0438\u0440\u044f\u044e\u0449\u0438\u0439 HTTPS \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u043c\u0438 \u0433\u0430\u0440\u0430\u043d\u0442\u0438\u044f\u043c\u0438 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u043f\u0440\u043e\u0438\u0437\u0432\u0435\u0434\u0451\u043d\u043d\u044b\u0445 \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0439. 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HTTPS \u0437\u0430\u0449\u0438\u0449\u0430\u0435\u0442 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":101818,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-101817","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=\"\u0418\u043d\u0436\u0435\u043d\u0435\u0440\u044b \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Intel \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0438\u043b\u0438 \u043d\u043e\u0432\u044b\u0439 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b HTTPA (HTTPS Attestable), \u0440\u0430\u0441\u0448\u0438\u0440\u044f\u044e\u0449\u0438\u0439 HTTPS 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