{"id":982,"date":"2025-12-22T08:36:32","date_gmt":"2025-12-22T07:36:32","guid":{"rendered":"https:\/\/mybox.com\/help\/?post_type=manual_kb&#038;p=982"},"modified":"2026-06-03T09:41:32","modified_gmt":"2026-06-03T07:41:32","slug":"what-is-lets-encrypt-and-how-does-it-work","status":"publish","type":"manual_kb","link":"https:\/\/mybox.com\/help\/en\/knowledgebase\/what-is-lets-encrypt-and-how-does-it-work\/","title":{"rendered":"What is Let&#8217;s Encrypt and how does it work?"},"content":{"rendered":"\n<div class=\"translation-block translation-block-merged\">\n<p class=\"wp-block-paragraph\">In December 2015, the non-profit organization Internet Security Research Group launched the <strong>Let&#8217;s Encrypt<\/strong> initiative, a free and automated SSL\/TLS certificate authority. The project was supported by major technology organizations, including Mozilla, Cisco, and Facebook.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The goal of Let&#8217;s Encrypt was simple: make website encryption free, accessible, and easy to deploy for everyone.<\/p>\n\n\n\n<\/div>\n\n<div id=\"mybox-1649649066\" class=\"mybox-content mybox-entity-placement\"><div class=\"early-access-banner-inpost\">\r\n  <div class=\"banner-left-inpost\">\r\n    <div class=\"icon-box-inpost\">\r\n      <img decoding=\"async\" src=\"https:\/\/mybox.com\/help\/wp-content\/uploads\/2026\/02\/square-info-icon.svg\" alt=\"Info\">\r\n    <\/div>\r\n    <div class=\"text-box-inpost\">\r\n      <span class=\"label-inpost\"><span class=\"translation-block translation-block-banner-text\">Early access<\/span><\/span>\r\n      <h4><span class=\"translation-block translation-block-banner-text\">Still need help?<\/span><\/h4>\r\n      <p><span class=\"translation-block translation-block-banner-text\">Contact our customer service team.<\/span><\/p>\r\n    <\/div>\r\n  <\/div>\r\n\r\n  <div class=\"banner-right-inpost\">\r\n    <a href=\"https:\/\/panel.mybox.com\/helpdesk2\/v\/list\/\" class=\"banner-button-inpost\"><span class=\"translation-block translation-block-banner-text\">Message us<\/span><\/a>\r\n  <\/div>\r\n<\/div><\/div>\n\n<div class=\"translation-block translation-block-merged\"><p class=\"wp-block-paragraph\">Today, Let&#8217;s Encrypt is one of the most widely used certificate authorities in the world and has helped make HTTPS the standard across the internet.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/what-is-lets-encrypt-and-how-does-it-work\/#What_Is_Lets_Encrypt\" >What Is Let&#8217;s Encrypt?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/what-is-lets-encrypt-and-how-does-it-work\/#Is_Lets_Encrypt_Secure\" >Is Let&#8217;s Encrypt Secure?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/what-is-lets-encrypt-and-how-does-it-work\/#What_Type_of_Certificate_Is_Lets_Encrypt\" >What Type of Certificate Is Let&#8217;s Encrypt?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/what-is-lets-encrypt-and-how-does-it-work\/#What_Types_of_Certificates_Are_Not_Available\" >What Types of Certificates Are Not Available?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/what-is-lets-encrypt-and-how-does-it-work\/#OV_Certificates\" >OV Certificates<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/what-is-lets-encrypt-and-how-does-it-work\/#EV_Certificates\" >EV Certificates<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/what-is-lets-encrypt-and-how-does-it-work\/#Certificate_Validity_Period\" >Certificate Validity Period<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/what-is-lets-encrypt-and-how-does-it-work\/#How_Does_Lets_Encrypt_Work\" >How Does Let&#8217;s Encrypt Work?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/what-is-lets-encrypt-and-how-does-it-work\/#1_Browser_Connects_to_the_Website\" >1. Browser Connects to the Website<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/what-is-lets-encrypt-and-how-does-it-work\/#2_Certificate_Is_Presented\" >2. Certificate Is Presented<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/what-is-lets-encrypt-and-how-does-it-work\/#3_Certificate_Validation\" >3. Certificate Validation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/what-is-lets-encrypt-and-how-does-it-work\/#4_Secure_Connection_Is_Established\" >4. Secure Connection Is Established<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/what-is-lets-encrypt-and-how-does-it-work\/#5_Data_Is_Encrypted\" >5. Data Is Encrypted<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/what-is-lets-encrypt-and-how-does-it-work\/#Why_Is_HTTPS_Important\" >Why Is HTTPS Important?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/what-is-lets-encrypt-and-how-does-it-work\/#Benefits_of_Lets_Encrypt\" >Benefits of Let&#8217;s Encrypt<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/what-is-lets-encrypt-and-how-does-it-work\/#Summary\" >Summary<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_Lets_Encrypt\"><\/span>What Is Let&#8217;s Encrypt?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Let&#8217;s Encrypt provides free SSL\/TLS certificates that allow websites to use:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>https:\/\/<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">instead of:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>http:\/\/<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">When a website uses HTTPS, communication between the visitor&#8217;s browser and the web server is encrypted.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This helps protect:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Login credentials<\/li>\n\n\n\n<li>Contact form submissions<\/li>\n\n\n\n<li>Personal information<\/li>\n\n\n\n<li>Payment data<\/li>\n\n\n\n<li>Session cookies<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">from being intercepted by unauthorized parties.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Is_Lets_Encrypt_Secure\"><\/span>Is Let&#8217;s Encrypt Secure?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Yes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The level of encryption provided by a Let&#8217;s Encrypt certificate is the same as that provided by most commercial SSL certificates.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A free certificate does <strong>not<\/strong> mean weaker encryption.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The primary differences between Let&#8217;s Encrypt and commercial certificates are related to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Validation methods<\/li>\n\n\n\n<li>Warranty programs<\/li>\n\n\n\n<li>Extended business verification options<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Type_of_Certificate_Is_Lets_Encrypt\"><\/span>What Type of Certificate Is Let&#8217;s Encrypt?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Let&#8217;s Encrypt issues:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DV (Domain Validation) certificates<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">A DV certificate verifies that the applicant controls the domain name.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For example:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>yourdomain.com<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">The certificate authority confirms domain ownership and then issues the certificate.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Types_of_Certificates_Are_Not_Available\"><\/span>What Types of Certificates Are Not Available?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Let&#8217;s Encrypt does not issue:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"OV_Certificates\"><\/span>OV Certificates<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>Organization Validation<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">These require verification of the company or organization requesting the certificate.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"EV_Certificates\"><\/span>EV Certificates<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>Extended Validation<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">These require extensive verification of the business entity and may display additional company information depending on browser support.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Certificate_Validity_Period\"><\/span>Certificate Validity Period<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Unlike many commercial SSL certificates that are issued for one year or longer, Let&#8217;s Encrypt certificates are valid for:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>90 days<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">However, most hosting providers automate the renewal process.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As a result, users typically do not need to manually renew the certificate every 90 days.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Does_Lets_Encrypt_Work\"><\/span>How Does Let&#8217;s Encrypt Work?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When a visitor opens a website secured with SSL\/TLS:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Browser_Connects_to_the_Website\"><\/span>1. Browser Connects to the Website<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The visitor enters:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>https:&#47;&#47;yourdomain.com<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Certificate_Is_Presented\"><\/span>2. Certificate Is Presented<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The web server sends its SSL certificate to the browser.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Certificate_Validation\"><\/span>3. Certificate Validation<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The browser checks:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Whether the certificate is valid.<\/li>\n\n\n\n<li>Whether it was issued by a trusted certificate authority.<\/li>\n\n\n\n<li>Whether it matches the requested domain.<\/li>\n\n\n\n<li>Whether it has expired.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Secure_Connection_Is_Established\"><\/span>4. Secure Connection Is Established<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If validation succeeds, the browser establishes an encrypted connection with the server.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Data_Is_Encrypted\"><\/span>5. Data Is Encrypted<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">All information exchanged between the browser and server is transmitted in encrypted form.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This helps prevent eavesdropping and data tampering.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_Is_HTTPS_Important\"><\/span>Why Is HTTPS Important?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">HTTPS is especially important for websites that:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Allow user logins<\/li>\n\n\n\n<li>Process online orders<\/li>\n\n\n\n<li>Collect personal information<\/li>\n\n\n\n<li>Accept payments<\/li>\n\n\n\n<li>Provide customer portals<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Modern browsers may display security warnings for websites that do not use HTTPS.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Benefits_of_Lets_Encrypt\"><\/span>Benefits of Let&#8217;s Encrypt<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Free SSL certificates<\/li>\n\n\n\n<li>Strong encryption<\/li>\n\n\n\n<li>Automated issuance and renewal<\/li>\n\n\n\n<li>Trusted by major browsers<\/li>\n\n\n\n<li>Improves website security<\/li>\n\n\n\n<li>Enables HTTPS support<\/li>\n\n\n\n<li>Helps build visitor trust<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Summary\"><\/span>Summary<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Let&#8217;s Encrypt<\/strong> is a free certificate authority that provides <strong>DV SSL\/TLS certificates<\/strong> for websites.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Certificates are valid for <strong>90 days<\/strong>, but renewal is usually handled automatically by the hosting provider. Once installed, the certificate allows a website to use HTTPS and encrypt communication between visitors and the server, helping protect sensitive information from interception and unauthorized access.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n<\/div>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"template":"","format":"standard","manualknowledgebasecat":[11,25],"manual_kb_tag":[371,376,885,886,887,888,889,890,891,892],"class_list":["post-982","manual_kb","type-manual_kb","status-publish","format-standard","hentry","manualknowledgebasecat-ssl-certificates","manualknowledgebasecat-hosting","manual_kb_tag-lets-encrypt","manual_kb_tag-domain-validation","manual_kb_tag-certificate-authority","manual_kb_tag-free-ssl-certificates","manual_kb_tag-ssl-certificates","manual_kb_tag-https-encryption","manual_kb_tag-web-security","manual_kb_tag-internet-security-research-group","manual_kb_tag-automated-renewal","manual_kb_tag-short-lived-certificates"],"_links":{"self":[{"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/manual_kb\/982","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/manual_kb"}],"about":[{"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/types\/manual_kb"}],"author":[{"embeddable":true,"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/users\/1"}],"version-history":[{"count":2,"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/manual_kb\/982\/revisions"}],"predecessor-version":[{"id":4763,"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/manual_kb\/982\/revisions\/4763"}],"wp:attachment":[{"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/media?parent=982"}],"wp:term":[{"taxonomy":"manualknowledgebasecat","embeddable":true,"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/manualknowledgebasecat?post=982"},{"taxonomy":"manual_kb_tag","embeddable":true,"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/manual_kb_tag?post=982"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}