{"id":2119,"date":"2025-12-10T11:05:54","date_gmt":"2025-12-10T14:05:54","guid":{"rendered":"https:\/\/hackerrangers.siteup.dev\/?p=2119"},"modified":"2025-12-10T11:05:54","modified_gmt":"2025-12-10T14:05:54","slug":"cryptography-what-is-it-and-how-to-use-it","status":"publish","type":"post","link":"https:\/\/hackerrangers.siteup.dev\/pt\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/","title":{"rendered":"Criptografia: entenda a hist\u00f3ria, o que \u00e9 e como us\u00e1-la no dia-a-dia"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Qual \u00e9 a primeira coisa que voc\u00ea pensa ao ouvir ou ler a palavra \u201ccriptografia\u201d? Quem n\u00e3o possui muita familiaridade com o conceito, certamente imagina algo extremamente complexo e tecnol\u00f3gico, que utiliza c\u00e1lculos matem\u00e1ticos quase incompreens\u00edveis para tornar a vida digital mais segura. O que pouca gente sabe \u00e9 que tal arte \u00e9 muito mais antiga do que a seguran\u00e7a cibern\u00e9tica \u2014 na verdade, ela nasceu antes mesmo da computa\u00e7\u00e3o, com seus primeiros usos datados de 1900 a.C. pelos eg\u00edpcios!<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Para aplicar o contexto hist\u00f3rico, vamos nos focar no exemplo mais cl\u00e1ssico de criptografia: a Cifra de C\u00e9sar, inventada pelo Imp\u00e9rio Romano (27 a.C. a 476 d.C.), cujo nome \u00e9 uma homenagem ao imperador J\u00falio C\u00e9sar. Comparada com as cifras atuais, ela era bastante simples e arcaica: para cifrar um texto, simplesmente substitu\u00edmos uma letra por outra do alfabeto seguindo um n\u00famero espec\u00edfico de troca. Sendo assim, ao cifrar um texto com tr\u00eas \u201cpulos\u201d \u00e0 frente, a palavra \u201casa\u201d se tornaria \u201cdvd\u201d, por exemplo.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Durante s\u00e9culos, a criptografia foi utilizada com um \u00fanico prop\u00f3sito: proteger informa\u00e7\u00f5es e comunica\u00e7\u00f5es militares, de forma que os inimigos n\u00e3o fossem capazes de entender comandos ou estrat\u00e9gias caso uma mensagem fosse interceptada. Outro exemplo cl\u00e1ssico de criptografia militar \u00e9 a M\u00e1quina de Turing, criada pelo brit\u00e2nico Alan Turing para decifrar as comunica\u00e7\u00f5es criptografadas das tropas alem\u00e3s durante a Segunda Guerra Mundial. A inven\u00e7\u00e3o \u00e9 considerada crucial para a derrota do Partido Nazista.<\/span><\/p>\n<h2><b>Voc\u00ea usa e nem sabe!<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">No fim das contas, \u00e9 simples explicar o que \u00e9 criptografia: trata-se da arte de tornar uma informa\u00e7\u00e3o ileg\u00edvel para terceiros, \u201cembaralhando\u201d os caracteres de uma forma que aquele texto n\u00e3o possa ser interpretado por indiv\u00edduos alheios. \u00c9 natural que, com o advento da computa\u00e7\u00e3o pessoal e profissional, tal como o surgimento de amea\u00e7as cibern\u00e9ticas e a necessidade de proteger informa\u00e7\u00f5es digitais, essa t\u00e9cnica tenha sido aprimorada e se tornado onipresente no mundo digital.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Hoje em dia, voc\u00ea usa criptografia ao simplesmente acessar um website! Afinal, todas as p\u00e1ginas confi\u00e1veis usam o protocolo Hyper Text Transfer Protocol Secure (HTTPS), que emprega um certificado Transport Layer Security ou Secure Sockets Layer (TLS\/SSL) para criar uma esp\u00e9cie de \u201ct\u00fanel\u201d seguro para permitir uma comunica\u00e7\u00e3o protegida entre o seu dispositivo e o servidor final. Trata-se de algo t\u00e3o b\u00e1sico que os navegadores modernos at\u00e9 mesmo impedem que voc\u00ea acesse um site sem um certificado digital.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Indo al\u00e9m, tamb\u00e9m temos criptografia embarcada em hardwares (como chips criptogr\u00e1ficos presentes em alguns modelos de smartphones e laptops), sistemas banc\u00e1rios (incluindo cart\u00f5es de cr\u00e9dito) e assim por diante. N\u00e3o poder\u00edamos nos esquecer tamb\u00e9m das criptomoedas: h\u00e1 uma comunidade inteira entusiasta da criptoeconomia trocando, vendendo e comprando tokens registrados em redes <a href=\"https:\/\/hackerrangers.siteup.dev\/pt\/cybersecurity\/learn-about-blockchain-scams-and-frauds\/\">blockchain<\/a> , tecnologia baseada 100% na criptografia.<\/span><\/p>\n<h2><b>Dando um g\u00e1s na sua seguran\u00e7a<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Embora a criptografia j\u00e1 esteja embarcada em muitos hardwares e softwares que usamos comumente em nosso cotidiano, \u00e9 importante ressaltar que podemos muito bem adotar m\u00e9todos avan\u00e7ados para us\u00e1-la no intuito de refor\u00e7ar nossa seguran\u00e7a digital. Um bom exemplo disso \u00e9 usar uma rede virtual privada (virtual private network ou VPN), que adiciona uma camada extra de prote\u00e7\u00e3o no seu tr\u00e1fego de dados e, de quebra, ainda \u00e9 capaz de mascarar o seu endere\u00e7o IP, lhe tornando an\u00f4nimo na web.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">No fim das contas, a criptografia n\u00e3o \u00e9 nenhum bicho de sete cabe\u00e7as. Com um pouquinho de estudo, \u00e9 f\u00e1cil \u2014 e recomendado! \u2014 fazer o melhor uso poss\u00edvel dela para garantir a seguran\u00e7a de seus arquivos e dados.<\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>What is the first thing you think of when you hear or read the word &#8220;cryptography&#8221;? Those somewhat unfamiliar with the concept certainly imagine something extremely complex and technological, employing almost incomprehensible mathematical calculations to make life online safer. What few people know is that this craft is much older than cybersecurity \u2013 in fact, [&hellip;]<\/p>\n","protected":false},"author":4009,"featured_media":2121,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2119","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cybersecurity"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Cryptography: the history, what it is, and how to use it | Hacker Rangers<\/title>\n<meta name=\"description\" content=\"Discover how cryptography evolved from ancient ciphers to modern cybersecurity and learn simple ways to use encryption.\" \/>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Cryptography: the history, what it is, and how to use it | Hacker Rangers\" \/>\n<meta property=\"og:description\" content=\"Discover how cryptography evolved from ancient ciphers to modern cybersecurity and learn simple ways to use encryption.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/hackerrangers.siteup.dev\/pt\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/\" \/>\n<meta property=\"og:site_name\" content=\"Hacker Rangers\" \/>\n<meta property=\"article:published_time\" content=\"2025-12-10T14:05:54+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/hackerrangers.siteup.dev\/wp-content\/uploads\/2025\/12\/Cryptography-1.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1500\" \/>\n\t<meta property=\"og:image:height\" content=\"1000\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Hacker Rangers\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Hacker Rangers\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. tempo de leitura\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/\"},\"author\":{\"name\":\"Hacker Rangers\",\"@id\":\"https:\/\/hackerrangers.siteup.dev\/#\/schema\/person\/3e152a5bd1004506e37a9342cdd34c61\"},\"headline\":\"Cryptography: the history, what it is, and how to use it\",\"datePublished\":\"2025-12-10T14:05:54+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/\"},\"wordCount\":550,\"publisher\":{\"@id\":\"https:\/\/hackerrangers.siteup.dev\/#organization\"},\"image\":{\"@id\":\"https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/hackerrangers.siteup.dev\/wp-content\/uploads\/2025\/12\/Cryptography-1.png\",\"articleSection\":[\"Cybersecurity\"],\"inLanguage\":\"pt-BR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/\",\"url\":\"https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/\",\"name\":\"Cryptography: the history, what it is, and how to use it | Hacker Rangers\",\"isPartOf\":{\"@id\":\"https:\/\/hackerrangers.siteup.dev\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/hackerrangers.siteup.dev\/wp-content\/uploads\/2025\/12\/Cryptography-1.png\",\"datePublished\":\"2025-12-10T14:05:54+00:00\",\"description\":\"Discover how cryptography evolved from ancient ciphers to modern cybersecurity and learn simple ways to use encryption.\",\"breadcrumb\":{\"@id\":\"https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/#breadcrumb\"},\"inLanguage\":\"pt-BR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"pt-BR\",\"@id\":\"https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/#primaryimage\",\"url\":\"https:\/\/hackerrangers.siteup.dev\/wp-content\/uploads\/2025\/12\/Cryptography-1.png\",\"contentUrl\":\"https:\/\/hackerrangers.siteup.dev\/wp-content\/uploads\/2025\/12\/Cryptography-1.png\",\"width\":1500,\"height\":1000,\"caption\":\"Cryptography\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"In\u00edcio\",\"item\":\"https:\/\/hackerrangers.siteup.dev\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Cryptography: the history, what it is, and how to use it\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/hackerrangers.siteup.dev\/#website\",\"url\":\"https:\/\/hackerrangers.siteup.dev\/\",\"name\":\"Hacker Rangers\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\/\/hackerrangers.siteup.dev\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/hackerrangers.siteup.dev\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"pt-BR\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/hackerrangers.siteup.dev\/#organization\",\"name\":\"Hacker Rangers\",\"url\":\"https:\/\/hackerrangers.siteup.dev\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pt-BR\",\"@id\":\"https:\/\/hackerrangers.siteup.dev\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/hackerrangers.siteup.dev\/wp-content\/uploads\/2025\/07\/logo.svg\",\"contentUrl\":\"https:\/\/hackerrangers.siteup.dev\/wp-content\/uploads\/2025\/07\/logo.svg\",\"width\":104,\"height\":50,\"caption\":\"Hacker Rangers\"},\"image\":{\"@id\":\"https:\/\/hackerrangers.siteup.dev\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/hackerrangers.siteup.dev\/#\/schema\/person\/3e152a5bd1004506e37a9342cdd34c61\",\"name\":\"Hacker Rangers\",\"url\":\"https:\/\/hackerrangers.siteup.dev\/pt\/author\/hackerrangers\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Cryptography: the history, what it is, and how to use it | Hacker Rangers","description":"Discover how cryptography evolved from ancient ciphers to modern cybersecurity and learn simple ways to use encryption.","robots":{"index":"noindex","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"og_locale":"pt_BR","og_type":"article","og_title":"Cryptography: the history, what it is, and how to use it | Hacker Rangers","og_description":"Discover how cryptography evolved from ancient ciphers to modern cybersecurity and learn simple ways to use encryption.","og_url":"https:\/\/hackerrangers.siteup.dev\/pt\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/","og_site_name":"Hacker Rangers","article_published_time":"2025-12-10T14:05:54+00:00","og_image":[{"width":1500,"height":1000,"url":"https:\/\/hackerrangers.siteup.dev\/wp-content\/uploads\/2025\/12\/Cryptography-1.png","type":"image\/png"}],"author":"Hacker Rangers","twitter_card":"summary_large_image","twitter_misc":{"Escrito por":"Hacker Rangers","Est. tempo de leitura":"4 minutos"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/#article","isPartOf":{"@id":"https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/"},"author":{"name":"Hacker Rangers","@id":"https:\/\/hackerrangers.siteup.dev\/#\/schema\/person\/3e152a5bd1004506e37a9342cdd34c61"},"headline":"Cryptography: the history, what it is, and how to use it","datePublished":"2025-12-10T14:05:54+00:00","mainEntityOfPage":{"@id":"https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/"},"wordCount":550,"publisher":{"@id":"https:\/\/hackerrangers.siteup.dev\/#organization"},"image":{"@id":"https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/#primaryimage"},"thumbnailUrl":"https:\/\/hackerrangers.siteup.dev\/wp-content\/uploads\/2025\/12\/Cryptography-1.png","articleSection":["Cybersecurity"],"inLanguage":"pt-BR"},{"@type":"WebPage","@id":"https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/","url":"https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/","name":"Cryptography: the history, what it is, and how to use it | Hacker Rangers","isPartOf":{"@id":"https:\/\/hackerrangers.siteup.dev\/#website"},"primaryImageOfPage":{"@id":"https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/#primaryimage"},"image":{"@id":"https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/#primaryimage"},"thumbnailUrl":"https:\/\/hackerrangers.siteup.dev\/wp-content\/uploads\/2025\/12\/Cryptography-1.png","datePublished":"2025-12-10T14:05:54+00:00","description":"Discover how cryptography evolved from ancient ciphers to modern cybersecurity and learn simple ways to use encryption.","breadcrumb":{"@id":"https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/#breadcrumb"},"inLanguage":"pt-BR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/"]}]},{"@type":"ImageObject","inLanguage":"pt-BR","@id":"https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/#primaryimage","url":"https:\/\/hackerrangers.siteup.dev\/wp-content\/uploads\/2025\/12\/Cryptography-1.png","contentUrl":"https:\/\/hackerrangers.siteup.dev\/wp-content\/uploads\/2025\/12\/Cryptography-1.png","width":1500,"height":1000,"caption":"Cryptography"},{"@type":"BreadcrumbList","@id":"https:\/\/hackerrangers.siteup.dev\/cybersecurity\/cryptography-what-is-it-and-how-to-use-it\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"In\u00edcio","item":"https:\/\/hackerrangers.siteup.dev\/"},{"@type":"ListItem","position":2,"name":"Cryptography: the history, what it is, and how to use it"}]},{"@type":"WebSite","@id":"https:\/\/hackerrangers.siteup.dev\/#website","url":"https:\/\/hackerrangers.siteup.dev\/","name":"Hacker Rangers","description":"","publisher":{"@id":"https:\/\/hackerrangers.siteup.dev\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/hackerrangers.siteup.dev\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"pt-BR"},{"@type":"Organization","@id":"https:\/\/hackerrangers.siteup.dev\/#organization","name":"Hacker Rangers","url":"https:\/\/hackerrangers.siteup.dev\/","logo":{"@type":"ImageObject","inLanguage":"pt-BR","@id":"https:\/\/hackerrangers.siteup.dev\/#\/schema\/logo\/image\/","url":"https:\/\/hackerrangers.siteup.dev\/wp-content\/uploads\/2025\/07\/logo.svg","contentUrl":"https:\/\/hackerrangers.siteup.dev\/wp-content\/uploads\/2025\/07\/logo.svg","width":104,"height":50,"caption":"Hacker Rangers"},"image":{"@id":"https:\/\/hackerrangers.siteup.dev\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/hackerrangers.siteup.dev\/#\/schema\/person\/3e152a5bd1004506e37a9342cdd34c61","name":"Hacker Rangers","url":"https:\/\/hackerrangers.siteup.dev\/pt\/author\/hackerrangers\/"}]}},"_links":{"self":[{"href":"https:\/\/hackerrangers.siteup.dev\/pt\/wp-json\/wp\/v2\/posts\/2119","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hackerrangers.siteup.dev\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hackerrangers.siteup.dev\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hackerrangers.siteup.dev\/pt\/wp-json\/wp\/v2\/users\/4009"}],"replies":[{"embeddable":true,"href":"https:\/\/hackerrangers.siteup.dev\/pt\/wp-json\/wp\/v2\/comments?post=2119"}],"version-history":[{"count":0,"href":"https:\/\/hackerrangers.siteup.dev\/pt\/wp-json\/wp\/v2\/posts\/2119\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hackerrangers.siteup.dev\/pt\/wp-json\/wp\/v2\/media\/2121"}],"wp:attachment":[{"href":"https:\/\/hackerrangers.siteup.dev\/pt\/wp-json\/wp\/v2\/media?parent=2119"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hackerrangers.siteup.dev\/pt\/wp-json\/wp\/v2\/categories?post=2119"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hackerrangers.siteup.dev\/pt\/wp-json\/wp\/v2\/tags?post=2119"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}