{"id":18963,"date":"2025-12-19T20:10:31","date_gmt":"2025-12-19T20:10:31","guid":{"rendered":"https:\/\/www.mailgun.com\/glossary\/criptografia-de-chave-publica\/"},"modified":"2026-09-08T23:25:08","modified_gmt":"2026-09-08T23:25:08","slug":"criptografia-de-chave-publica","status":"publish","type":"glossary","link":"https:\/\/www.mailgun.com\/pt\/glossary\/criptografia-de-chave-publica\/","title":{"rendered":"Criptografia de chave p\u00fablica"},"content":{"rendered":"<h1>Criptografia de chave p\u00fablica<\/h1>\n<p><span data-contrast=\"none\">A criptografia de chave p\u00fablica, tamb\u00e9m chamada de criptografia assim\u00e9trica, usa um par de chaves<\/span><span data-contrast=\"none\">\u00a0\u2013\u00a0<\/span><span data-contrast=\"none\">uma p\u00fablica e uma privada<\/span><span data-contrast=\"none\">\u00a0\u2013\u00a0<\/span><span data-contrast=\"none\">para trocar dados com seguran\u00e7a. A chave p\u00fablica \u00e9 compartilhada abertamente, enquanto a chave privada \u00e9 mantida em segredo. Qualquer coisa criptografada com uma chave s\u00f3 pode ser descriptografada com a outra.\u00a0<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">No e-mail, esse modelo criptogr\u00e1fico aparece em dois lugares principais:\u00a0<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<ul>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"65\" data-list-defn-props=\"{\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-contrast=\"none\">Protocolos de criptografia como o TLS usam criptografia de chave p\u00fablica para proteger mensagens em tr\u00e2nsito.\u00a0<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/li>\n<\/ul>\n<ul>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"65\" data-list-defn-props=\"{\" data-aria-posinset=\"2\" data-aria-level=\"1\"><a href=\"https:\/\/www.mailgun.com\/blog\/deliverability\/email-authentication-your-id-card-sending\/\"><span data-contrast=\"none\">Padr\u00f5es de autentica\u00e7\u00e3o<\/span><\/a><span data-contrast=\"none\">\u00a0<\/span><span data-contrast=\"none\">como<\/span><span data-contrast=\"none\">\u00a0<\/span><a href=\"https:\/\/www.mailgun.com\/blog\/deliverability\/understanding-dkim-how-it-works\/\"><span data-contrast=\"none\">DKIM<\/span><\/a><span data-contrast=\"none\">\u00a0<\/span><span data-contrast=\"none\">dependem<\/span><span data-contrast=\"none\">\u00a0dela para assinar mensagens de sa\u00edda com uma chave privada que os provedores de caixa de entrada podem verificar usando a chave p\u00fablica publicada no DNS.\u00a0<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/li>\n<\/ul>\n<p><span data-contrast=\"none\">Esse modelo garante que as mensagens n\u00e3o foram alteradas e realmente v\u00eam de quem dizem vir<\/span><span data-contrast=\"none\">,\u00a0<\/span><span data-contrast=\"none\">gerando confian\u00e7a tanto com os ISPs quanto com os destinat\u00e1rios.\u00a0<\/span><span data-contrast=\"none\">Em resumo<\/span><span data-contrast=\"none\">,<\/span><span data-contrast=\"none\">\u00a0<\/span><span data-contrast=\"none\">a<\/span><span data-contrast=\"none\"> criptografia de chave p\u00fablica \u00e9 como o seu e-mail prova que \u00e9 voc\u00ea<\/span><span data-contrast=\"none\">\u00a0e\u00a0<\/span><span data-contrast=\"none\">n\u00e3o um spoof.<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Criptografia de chave p\u00fablica A criptografia de chave p\u00fablica, tamb\u00e9m chamada de criptografia assim\u00e9trica, usa um par de chaves\u00a0\u2013\u00a0uma p\u00fablica e uma privada\u00a0\u2013\u00a0para trocar dados com seguran\u00e7a. A chave p\u00fablica \u00e9 compartilhada abertamente, enquanto a chave privada \u00e9 mantida em segredo. Qualquer coisa criptografada com uma chave s\u00f3 pode ser descriptografada com a outra.\u00a0\u00a0 No [&hellip;]<\/p>\n","protected":false},"author":23,"template":"","meta":{"_acf_changed":false},"class_list":["post-18963","glossary","type-glossary","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Criptografia de chave p\u00fablica \u2013 Gloss\u00e1rio de termos de e-mail | Mailgun<\/title>\n<meta name=\"description\" content=\"A criptografia de chave p\u00fablica \u00e9 o processo de usar uma chave p\u00fablica e uma privada para criptografar dados. 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