{"id":16688,"date":"2025-10-24T10:10:55","date_gmt":"2025-10-24T03:10:55","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=16688"},"modified":"2026-02-27T13:19:32","modified_gmt":"2026-02-27T06:19:32","slug":"chung-chi-ssl","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/","title":{"rendered":"SSL l\u00e0 g\u00ec? To\u00e0n t\u1eadp v\u1ec1 ch\u1ee9ng ch\u1ec9 s\u1ed1 SSL b\u1ea3o m\u1eadt website hi\u1ec7u qu\u1ea3"},"content":{"rendered":"<div class=\"summary\"><strong>T\u00f3m t\u1eaft b\u00e0i vi\u1ebft<\/strong>:<br \/>\nCh\u1ee9ng ch\u1ec9 s\u1ed1 SSL (Secure Sockets Layer) l\u00e0 m\u1ed9t ch\u1ee9ng ch\u1ec9 k\u1ef9 thu\u1eadt s\u1ed1 gi\u00fap x\u00e1c th\u1ef1c danh t\u00ednh <a href=\"https:\/\/interdata.vn\/blog\/website-la-gi\/\">website<\/a> v\u00e0 <a href=\"https:\/\/interdata.vn\/blog\/ma-hoa-du-lieu-data-encryption\/\">m\u00e3 h\u00f3a d\u1eef li\u1ec7u<\/a> truy\u1ec1n gi\u1eefa tr\u00ecnh duy\u1ec7t ng\u01b0\u1eddi d\u00f9ng v\u00e0 <a href=\"https:\/\/interdata.vn\/blog\/may-chu-server-la-gi\/\">m\u00e1y ch\u1ee7<\/a> web. N\u00f3 \u0111\u1ea3m b\u1ea3o th\u00f4ng tin nh\u1ea1y c\u1ea3m nh\u01b0 m\u1eadt kh\u1ea9u, th\u1ebb t\u00edn d\u1ee5ng \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 kh\u1ecfi tin t\u1eb7c, th\u01b0\u1eddng hi\u1ec3n th\u1ecb qua bi\u1ec3u t\u01b0\u1ee3ng \u1ed5 kh\u00f3a v\u00e0 &#8220;https:\/\/&#8221; tr\u00ean tr\u00ecnh duy\u1ec7t.<\/p>\n<p><strong>N\u1ed9i dung n\u1ed5i b\u1eadt:<\/strong><\/p>\n<ul>\n<li><strong>T\u1ea7m quan tr\u1ecdng c\u1ee7a SSL\/TLS \u0111\u1ed1i v\u1edbi website<\/strong>: B\u1ea3o m\u1eadt, x\u00e1c th\u1ef1c website, t\u0103ng th\u1ee9 h\u1ea1ng <a href=\"https:\/\/interdata.vn\/blog\/seo-la-gi\/\">SEO<\/a>, t\u0103ng ni\u1ec1m tin cho kh\u00e1ch h\u00e0ng, tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh.<\/li>\n<li><strong>C\u00e1c lo\u1ea1i ch\u1ee9ng ch\u1ec9 SSL ph\u1ed5 bi\u1ebfn<\/strong>: <a href=\"https:\/\/interdata.vn\/blog\/chung-chi-dv-ssl-la-gi\/\">DV SSL<\/a>, <a href=\"https:\/\/interdata.vn\/blog\/ov-ssl-la-gi\/\">OV SSL<\/a>, <a href=\"https:\/\/interdata.vn\/blog\/ev-ssl\/\">EV SSL<\/a>, <a href=\"https:\/\/interdata.vn\/blog\/wildcard-ssl-la-gi\/\">Wildcard SSL<\/a>, <a href=\"https:\/\/interdata.vn\/blog\/san-storage-area-network-la-gi\/\">SAN<\/a> SSL, Single Domain SSL.<\/li>\n<li><strong>C\u00e1c th\u00e0nh ph\u1ea7n c\u1ee7a ch\u1ee9ng ch\u1ec9 b\u1ea3o m\u1eadt SSL<\/strong>: Public Key v\u00e0 Private Key, <a href=\"https:\/\/interdata.vn\/blog\/certificate-authority-ca-la-gi\/\">Certificate Authority<\/a> (CA), Subject Information, Digital Signature<\/li>\n<li><strong>C\u00e1ch ki\u1ec3m tra website \u0111\u00e3 c\u00f3 SSL<\/strong>: Ki\u1ec3m tra qua tr\u00ecnh duy\u1ec7t, c\u00f4ng c\u1ee5, tr\u00ean <a href=\"https:\/\/interdata.vn\/blog\/cpanel\/\">cPanel<\/a>, l\u1ec7nh OpenSSL.<\/li>\n<li><strong>C\u00e1ch ch\u1ecdn SSL<\/strong>: X\u00e1c \u0111\u1ecbnh lo\u1ea1i h\u00ecnh website, s\u1ed1 l\u01b0\u1ee3ng <a href=\"https:\/\/interdata.vn\/blog\/domain-la-gi\/\">t\u00ean mi\u1ec1n<\/a> c\u1ea7n b\u1ea3o v\u1ec7, ch\u1ecdn nh\u00e0 cung c\u1ea5p uy t\u00edn.<\/li>\n<li><strong>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQs)<\/strong><\/li>\n<\/ul>\n<\/div>\n<p>Trong th\u1eddi \u0111\u1ea1i <a href=\"https:\/\/interdata.vn\/blog\/mang-internet\/\">internet<\/a> ph\u00e1t tri\u1ec3n m\u1ea1nh m\u1ebd, b\u1ea3o m\u1eadt th\u00f4ng tin ng\u01b0\u1eddi d\u00f9ng tr\u1edf th\u00e0nh y\u1ebfu t\u1ed1 s\u1ed1ng c\u00f2n v\u1edbi m\u1ecdi website. Khi truy c\u1eadp m\u1ed9t <a href=\"https:\/\/interdata.vn\/blog\/page-la-gi\/\">trang web<\/a>, b\u1ea1n c\u00f3 bao gi\u1edd \u0111\u1ec3 \u00fd bi\u1ec3u t\u01b0\u1ee3ng \u1ed5 kh\u00f3a m\u00e0u xanh xu\u1ea5t hi\u1ec7n tr\u01b0\u1edbc t\u00ean mi\u1ec1n kh\u00f4ng? \u0110\u00f3 ch\u00ednh l\u00e0 d\u1ea5u hi\u1ec7u cho th\u1ea5y website \u0111ang s\u1eed d\u1ee5ng <strong>ch\u1ee9ng ch\u1ec9 <a href=\"https:\/\/interdata.vn\/blog\/cach-bao-mat-website\/\">b\u1ea3o m\u1eadt Website<\/a> SSL (Secure Sockets Layer)<\/strong>.<\/p>\n<p>V\u1eady <strong>ch\u1ee9ng ch\u1ec9 s\u1ed1 SSL l\u00e0 g\u00ec<\/strong>, t\u1ea1i sao website n\u00e0o c\u0169ng c\u1ea7n c\u00f3 SSL, c\u00f3 bao nhi\u00eau lo\u1ea1i ch\u1ee9ng ch\u1ec9 SSL v\u00e0 l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 c\u00e0i \u0111\u1eb7t ch\u1ee9ng ch\u1ec9 SSL \u0111\u00fang c\u00e1ch? H\u00e3y c\u00f9ng InterData t\u00ecm hi\u1ec3u chi ti\u1ebft trong b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-white ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">N\u1ed8I DUNG<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#SSL-la-gi\" >SSL l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#Cach-thuc-SSL-hoat-dong\" >C\u00e1ch th\u1ee9c SSL ho\u1ea1t \u0111\u1ed9ng\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#Tam-quan-trong-cua-SSLTLS-doi-voi-website\" >T\u1ea7m quan tr\u1ecdng c\u1ee7a SSL\/TLS \u0111\u1ed1i v\u1edbi website<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#1-Bao-mat-du-lieu-nguoi-dung\" >1. B\u1ea3o m\u1eadt d\u1eef li\u1ec7u ng\u01b0\u1eddi d\u00f9ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#2-Tang-cuong-long-tin-cua-nguoi-dung\" >2. T\u0103ng c\u01b0\u1eddng l\u00f2ng tin c\u1ee7a ng\u01b0\u1eddi d\u00f9ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#3-Cai-thien-SEO\" >3. C\u1ea3i thi\u1ec7n SEO<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#4-Tuan-thu-cac-tieu-chuan-bao-mat\" >4. Tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n b\u1ea3o m\u1eadt<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#Dau-hieu-nhan-biet-website-co-SSL\" >D\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft website c\u00f3 SSL<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#So-sanh-SSL-mien-phi-Lets-Encrypt-va-SSL-tra-phi\" >So s\u00e1nh SSL mi\u1ec5n ph\u00ed (Let&#8217;s Encrypt) v\u00e0 SSL tr\u1ea3 ph\u00ed<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#Khi-nao-nen-dung-SSL-mien-phi\" >Khi n\u00e0o n\u00ean d\u00f9ng SSL mi\u1ec5n ph\u00ed?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#Khi-nao-bat-buoc-phai-dung-SSL-tra-phi\" >Khi n\u00e0o b\u1eaft bu\u1ed9c ph\u1ea3i d\u00f9ng SSL tr\u1ea3 ph\u00ed?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#Su-khac-biet-giua-chung-chi-SSL-va-TLS\" >S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa ch\u1ee9ng ch\u1ec9 SSL v\u00e0 TLS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#6-Loai-chung-chi-SSL\" >6 Lo\u1ea1i ch\u1ee9ng ch\u1ec9 SSL<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#1-Domain-Validation-DV\" >1. Domain Validation (DV)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#2-Organization-Validation-OV\" >2. Organization Validation (OV)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#3-Extended-Validation-EV\" >3. Extended Validation (EV)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#4-Single-Domain-SSL\" >4. Single Domain SSL<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#5-Wildcard-SSL\" >5. Wildcard SSL<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#6-Multi-Domain-SSL-SAN-SSL\" >6. Multi-Domain SSL (SAN SSL)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#Cac-thanh-phan-cua-chung-chi-bao-mat-SSL\" >C\u00e1c th\u00e0nh ph\u1ea7n c\u1ee7a ch\u1ee9ng ch\u1ec9 b\u1ea3o m\u1eadt SSL<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#1-Public-Key-va-Private-Key\" >1. Public Key v\u00e0 Private Key<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#2-Certificate-Authority-CA\" >2. Certificate Authority (CA)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#3-Subject-Information\" >3. Subject Information<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#4-Digital-Signature\" >4. Digital Signature<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#Huong-dan-cach-cai-dat-chung-chi-SSL\" >H\u01b0\u1edbng d\u1eabn c\u00e1ch c\u00e0i \u0111\u1eb7t ch\u1ee9ng ch\u1ec9 SSL<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#Cach-kiem-tra-chung-chi-SSL-da-duoc-cai-dat-dung\" >C\u00e1ch ki\u1ec3m tra ch\u1ee9ng ch\u1ec9 SSL \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t \u0111\u00fang<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#1-Kiem-tra-qua-trinh-duyet\" >1. Ki\u1ec3m tra qua tr\u00ecnh duy\u1ec7t<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#2-Su-dung-cong-cu-kiem-tra-SSL-truc-tuyen\" >2. S\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 ki\u1ec3m tra SSL tr\u1ef1c tuy\u1ebfn<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#3-Kiem-tra-tren-cPanel\" >3. Ki\u1ec3m tra tr\u00ean cPanel<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#4-Kiem-tra-bang-lenh-OpenSSL\" >4. Ki\u1ec3m tra b\u1eb1ng l\u1ec7nh OpenSSL<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#Cach-chon-chung-chi-SSL-phu-hop-cho-doanh-nghiep\" >C\u00e1ch ch\u1ecdn ch\u1ee9ng ch\u1ec9 SSL ph\u00f9 h\u1ee3p cho doanh nghi\u1ec7p<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#Cau-hoi-thuong-gap-ve-chung-chi-SSL-FAQ\" >C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 ch\u1ee9ng ch\u1ec9 SSL (FAQ)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#SSL-la-gi-va-co-can-thiet-cho-website-khong\" >SSL l\u00e0 g\u00ec v\u00e0 c\u00f3 c\u1ea7n thi\u1ebft cho website kh\u00f4ng?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#SSL-mien-phi-co-an-toan-khong\" >SSL mi\u1ec5n ph\u00ed c\u00f3 an to\u00e0n kh\u00f4ng?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-35\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#Lam-the-nao-de-kiem-tra-mot-website-da-co-SSL-hay-chua\" >L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ki\u1ec3m tra m\u1ed9t website \u0111\u00e3 c\u00f3 SSL hay ch\u01b0a?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-36\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#SSL-co-thoi-han-trong-bao-lau-Tai-sao-phai-gia-han\" >SSL c\u00f3 th\u1eddi h\u1ea1n trong bao l\u00e2u? T\u1ea1i sao ph\u1ea3i gia h\u1ea1n?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-37\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#EV-SSL-co-can-thiet-khong\" >EV SSL c\u00f3 c\u1ea7n thi\u1ebft kh\u00f4ng?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-38\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#Gia-han-SSL-nhu-the-nao\" >Gia h\u1ea1n SSL nh\u01b0 th\u1ebf n\u00e0o?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-39\" href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/#HTTPS-co-giup-SEO-khong\" >HTTPS c\u00f3 gi\u00fap SEO kh\u00f4ng?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"SSL-la-gi\"><\/span>SSL l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>SSL (Secure Sockets Layer) l\u00e0 ch\u1ee9ng ch\u1ec9 b\u1ea3o m\u1eadt <\/strong>\u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 <strong>m\u00e3 h\u00f3a d\u1eef li\u1ec7u gi\u1eefa m\u00e1y ch\u1ee7 v\u00e0 tr\u00ecnh duy\u1ec7t c\u1ee7a ng\u01b0\u1eddi d\u00f9ng<\/strong>. M\u1ee5c ti\u00eau ch\u00ednh c\u1ee7a SSL l\u00e0 b\u1ea3o v\u1ec7 th\u00f4ng tin nh\u1ea1y c\u1ea3m, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u1eadt kh\u1ea9u, th\u1ebb t\u00edn d\u1ee5ng, ho\u1eb7c c\u00e1c giao d\u1ecbch tr\u1ef1c tuy\u1ebfn, kh\u1ecfi s\u1ef1 \u0111\u00e1nh c\u1eafp v\u00e0 x\u00e2m nh\u1eadp tr\u00e1i ph\u00e9p.<\/p>\n<p>Khi m\u1ed9t website c\u00e0i \u0111\u1eb7t ch\u1ee9ng ch\u1ec9 s\u1ed1 SSL, vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u s\u1ebd gi\u1ed1ng nh\u01b0 g\u1eedi m\u1ed9t l\u00e1 th\u01b0 \u0111\u01b0\u1ee3c ni\u00eam phong trong m\u1ed9t chi\u1ebfc h\u1ed9p s\u1eaft c\u00f3 kh\u00f3a an to\u00e0n. Ch\u1ec9 ng\u01b0\u1eddi g\u1eedi v\u00e0 ng\u01b0\u1eddi nh\u1eadn c\u00f3 ch\u00eca kh\u00f3a m\u1edbi c\u00f3 th\u1ec3 m\u1edf ra xem n\u1ed9i dung.<\/p>\n<p>Li\u00ean k\u1ebft \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng t\u1ea5t c\u1ea3 d\u1eef li\u1ec7u trao \u0111\u1ed5i gi\u1eefa m\u00e1y ch\u1ee7 v\u00e0 tr\u00ecnh duy\u1ec7t \u0111\u1ec1u \u0111\u01b0\u1ee3c gi\u1eef ri\u00eang t\u01b0 v\u00e0 to\u00e0n v\u1eb9n. Vi\u1ec7c hi\u1ec3u r\u00f5 ch\u1ee9ng ch\u1ec9 SSL l\u00e0 g\u00ec l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean \u0111\u1ec3 b\u1ea3o v\u1ec7 website c\u1ee7a b\u1ea1n.<\/p>\n<p>M\u1eb7c d\u00f9 t\u00ean g\u1ecdi &#8220;SSL&#8221; v\u1eabn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn, c\u00f4ng ngh\u1ec7 hi\u1ec7n \u0111\u1ea1i th\u1ef1c ch\u1ea5t l\u00e0 TLS (Transport Layer Security). TLS l\u00e0 phi\u00ean b\u1ea3n k\u1ebf nhi\u1ec7m, c\u1ea3i ti\u1ebfn v\u00e0 an to\u00e0n h\u01a1n c\u1ee7a SSL. Tuy nhi\u00ean, v\u00ec th\u00f3i quen, &#8220;SSL&#8221; v\u1eabn l\u00e0 thu\u1eadt ng\u1eef \u0111\u01b0\u1ee3c d\u00f9ng r\u1ed9ng r\u00e3i \u0111\u1ec3 ch\u1ec9 chung c\u00f4ng ngh\u1ec7 m\u00e3 h\u00f3a n\u00e0y. Khi b\u1ea1n mua m\u1ed9t ch\u1ee9ng ch\u1ec9 SSL ng\u00e0y nay, b\u1ea1n th\u1ef1c ch\u1ea5t \u0111ang nh\u1eadn \u0111\u01b0\u1ee3c m\u1ed9t ch\u1ee9ng ch\u1ec9 TLS hi\u1ec7n \u0111\u1ea1i nh\u1ea5t.<\/p>\n<figure id=\"attachment_16702\" aria-describedby=\"caption-attachment-16702\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/08\/ssl-la-gi.webp\" alt=\"SSL l\u00e0 g\u00ec?\" width=\"900\" height=\"525\" title=\"\"><figcaption id=\"caption-attachment-16702\" class=\"wp-caption-text\">SSL l\u00e0 g\u00ec?<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Cach-thuc-SSL-hoat-dong\"><\/span><strong>C\u00e1ch th\u1ee9c SSL ho\u1ea1t \u0111\u1ed9ng\u00a0<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ch\u1ee9ng ch\u1ec9 b\u1ea3o m\u1eadt SSL\/TLS c\u00f3 v\u1ebb ph\u1ee9c t\u1ea1p, nh\u01b0ng v\u1ec1 c\u01a1 b\u1ea3n n\u00f3 di\u1ec5n ra th\u00f4ng qua m\u1ed9t th\u1ee7 t\u1ee5c g\u1ecdi l\u00e0 <strong>TLS handshake<\/strong> (th\u01b0\u1eddng g\u1ecdi ph\u1ed5 th\u00f4ng l\u00e0 &#8220;SSL Handshake&#8221;). \u0110\u00e2y l\u00e0 m\u1ed9t cu\u1ed9c trao \u0111\u1ed5i t\u1ef1 \u0111\u1ed9ng gi\u1eefa tr\u00ecnh duy\u1ec7t v\u00e0 m\u00e1y ch\u1ee7 tr\u01b0\u1edbc khi d\u1eef li\u1ec7u th\u1ef1c s\u1ef1 \u0111\u01b0\u1ee3c truy\u1ec1n, th\u01b0\u1eddng ho\u00e0n t\u1ea5t trong v\u00e0i mili gi\u00e2y.<\/p>\n<p>Quy tr\u00ecnh handshake bao g\u1ed3m c\u00e1c b\u01b0\u1edbc ch\u00ednh sau (t\u00f3m t\u1eaft):<\/p>\n<ol>\n<li><strong>ClientHello:<\/strong> Tr\u00ecnh duy\u1ec7t g\u1eedi m\u1ed9t th\u00f4ng \u0111i\u1ec7p kh\u1edfi \u0111\u1ea7u (ClientHello) ch\u1ee9a phi\u00ean b\u1ea3n giao th\u1ee9c (TLS), danh s\u00e1ch cipher suites h\u1ed7 tr\u1ee3 v\u00e0 m\u1ed9t nonce (random).<\/li>\n<li><strong>ServerHello &amp; Certificate:<\/strong> M\u00e1y ch\u1ee7 tr\u1ea3 l\u1eddi b\u1eb1ng ServerHello (ch\u1ecdn phi\u00ean b\u1ea3n v\u00e0 cipher) v\u00e0 g\u1eedi <strong>certificate chain<\/strong> \u2014 g\u1ed3m ch\u1ee9ng ch\u1ec9 c\u1ee7a m\u00e1y ch\u1ee7 v\u00e0 c\u00e1c intermediate CA.<\/li>\n<li><strong>X\u00e1c th\u1ef1c ch\u1ee9ng ch\u1ec9:<\/strong> Tr\u00ecnh duy\u1ec7t ki\u1ec3m tra chu\u1ed7i ch\u1ee9ng ch\u1ec9 (\u0111\u01b0\u1ee3c c\u1ea5p b\u1edfi CA \u0111\u00e1ng tin c\u1eady), th\u1eddi h\u1ea1n, v\u00e0 <em><a href=\"https:\/\/interdata.vn\/blog\/hostname-la-gi\/\">hostname<\/a><\/em> kh\u1edbp v\u1edbi t\u00ean mi\u1ec1n c\u1ee7a trang. N\u1ebfu kh\u00f4ng h\u1ee3p l\u1ec7, tr\u00ecnh duy\u1ec7t s\u1ebd c\u1ea3nh b\u00e1o ng\u01b0\u1eddi d\u00f9ng.<\/li>\n<li><strong>T\u1ea1o kh\u00f3a phi\u00ean (Session Key):<\/strong> Tr\u00ecnh duy\u1ec7t v\u00e0 m\u00e1y ch\u1ee7 c\u00f9ng t\u1ea1o kh\u00f3a phi\u00ean. C\u01a1 ch\u1ebf t\u1ea1o kh\u00f3a tu\u1ef3 thu\u1ed9c v\u00e0o ph\u01b0\u01a1ng ph\u00e1p trao \u0111\u1ed5i kh\u00f3a: c\u00f3 th\u1ec3 l\u00e0 RSA (tr\u00ecnh duy\u1ec7t g\u1eedi pre-master secret m\u00e3 h\u00f3a b\u1eb1ng public key m\u00e1y ch\u1ee7) ho\u1eb7c, ph\u1ed5 bi\u1ebfn h\u01a1n hi\u1ec7n nay, l\u00e0 <strong>DHE\/ECDHE<\/strong> \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o <em>forward secrecy<\/em>. C\u00e1c nonce t\u1eeb ClientHello\/ServerHello \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 sinh kh\u00f3a cu\u1ed1i c\u00f9ng.<\/li>\n<li><strong>ChangeCipherSpec &amp; Finished:<\/strong> Sau khi kh\u00f3a phi\u00ean \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp, c\u1ea3 hai b\u00ean g\u1eedi th\u00f4ng b\u00e1o chuy\u1ec3n sang ch\u1ebf \u0111\u1ed9 m\u00e3 h\u00f3a (ChangeCipherSpec) v\u00e0 th\u00f4ng \u0111i\u1ec7p \u201cFinished\u201d \u0111\u1ec3 x\u00e1c nh\u1eadn r\u1eb1ng handshake th\u00e0nh c\u00f4ng.<\/li>\n<li><strong>Truy\u1ec1n d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a:<\/strong> T\u1eeb th\u1eddi \u0111i\u1ec3m n\u00e0y, d\u1eef li\u1ec7u \u1ee9ng d\u1ee5ng \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a b\u1eb1ng kh\u00f3a phi\u00ean (symmetric encryption). Giao th\u1ee9c TLS \u0111\u1ea3m b\u1ea3o r\u1eb1ng ch\u1ec9 hai b\u00ean c\u00f3 kh\u00f3a phi\u00ean h\u1ee3p l\u1ec7 m\u1edbi c\u00f3 th\u1ec3 gi\u1ea3i m\u00e3 d\u1eef li\u1ec7u, mi\u1ec5n l\u00e0 c\u00e1c <a href=\"https:\/\/interdata.vn\/blog\/thuat-toan-algorithm\/\">thu\u1eadt to\u00e1n<\/a> v\u00e0 kh\u00f3a kh\u00f4ng b\u1ecb b\u1ebb kh\u00f3a.<\/li>\n<\/ol>\n<p><strong>L\u01b0u \u00fd:<\/strong> m\u1eb7c d\u00f9 TLS cung c\u1ea5p l\u1edbp b\u1ea3o m\u1eadt m\u1ea1nh m\u1ebd, m\u1ee9c \u0111\u1ed9 an to\u00e0n c\u00f2n ph\u1ee5 thu\u1ed9c v\u00e0o c\u1ea5u h\u00ecnh (phi\u00ean b\u1ea3n TLS, cipher suites), qu\u1ea3n l\u00fd ch\u1ee9ng ch\u1ec9 (intermediate, revocation), v\u00e0 vi\u1ec7c c\u1eadp nh\u1eadt\/ v\u00e1 l\u1ed7i. C\u00e1c t\u00ednh n\u0103ng b\u1ed5 sung nh\u01b0 <strong>OCSP stapling<\/strong>, <strong>HSTS<\/strong> hay <strong>session resumption<\/strong> c\u0169ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 c\u1ea3i thi\u1ec7n hi\u1ec7u n\u0103ng v\u00e0 b\u1ea3o m\u1eadt.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Tam-quan-trong-cua-SSLTLS-doi-voi-website\"><\/span>T\u1ea7m quan tr\u1ecdng c\u1ee7a SSL\/TLS \u0111\u1ed1i v\u1edbi website<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Nhi\u1ec1u ng\u01b0\u1eddi m\u1edbi l\u00e0m web th\u01b0\u1eddng \u0111\u1eb7t c\u00e2u h\u1ecfi: &#8220;Website c\u1ee7a t\u00f4i ch\u1ec9 l\u00e0 trang gi\u1edbi thi\u1ec7u, kh\u00f4ng c\u00f3 thanh to\u00e1n, v\u1eady c\u00f3 th\u1ef1c s\u1ef1 c\u1ea7n SSL kh\u00f4ng?&#8221;. C\u00e2u tr\u1ea3 l\u1eddi ng\u1eafn g\u1ecdn l\u00e0: <strong>C\u00d3, r\u1ea5t c\u1ea7n thi\u1ebft<\/strong>. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng l\u1ee3i \u00edch kh\u00f4ng th\u1ec3 b\u1ecf qua m\u00e0 SSL mang l\u1ea1i, \u0111\u01b0\u1ee3c ch\u1ee9ng th\u1ef1c b\u1eb1ng c\u00e1c d\u1eef li\u1ec7u c\u1ee5 th\u1ec3.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1-Bao-mat-du-lieu-nguoi-dung\"><\/span>1. B\u1ea3o m\u1eadt d\u1eef li\u1ec7u ng\u01b0\u1eddi d\u00f9ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a SSL l\u00e0 m\u00e3 h\u00f3a d\u1eef li\u1ec7u, gi\u00fap b\u1ea3o v\u1ec7 th\u00f4ng tin ng\u01b0\u1eddi d\u00f9ng khi truy\u1ec1n qua Internet. V\u00ed d\u1ee5, khi b\u1ea1n nh\u1eadp th\u00f4ng tin th\u1ebb t\u00edn d\u1ee5ng ho\u1eb7c m\u1eadt kh\u1ea9u tr\u00ean m\u1ed9t trang web c\u00f3 c\u00e0i SSL, c\u00e1c d\u1eef li\u1ec7u n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a, tr\u00e1nh b\u1ecb k\u1ebb x\u1ea5u \u0111\u00e1nh c\u1eafp ho\u1eb7c can thi\u1ec7p trong su\u1ed1t qu\u00e1 tr\u00ecnh truy\u1ec1n t\u1ea3i.<\/p>\n<p>\u0110\u1eb7c bi\u1ec7t, v\u1edbi c\u00e1c trang web th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed ho\u1eb7c ng\u00e2n h\u00e0ng tr\u1ef1c tuy\u1ebfn, ch\u1ee9ng ch\u1ec9 b\u1ea3o m\u1eadt website SSL l\u00e0 y\u1ebfu t\u1ed1 b\u1eaft bu\u1ed9c \u0111\u1ec3 b\u1ea3o v\u1ec7 giao d\u1ecbch t\u00e0i ch\u00ednh, gi\u00fap \u0111\u1ea3m b\u1ea3o r\u1eb1ng th\u00f4ng tin c\u1ee7a kh\u00e1ch h\u00e0ng kh\u00f4ng b\u1ecb l\u1ed9 ra ngo\u00e0i.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2-Tang-cuong-long-tin-cua-nguoi-dung\"><\/span><span id=\"2-Tang-cuong-long-tin-cua-nguoi-dung\" class=\"ez-toc-section\"><\/span>2. T\u0103ng c\u01b0\u1eddng l\u00f2ng tin c\u1ee7a ng\u01b0\u1eddi d\u00f9ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Vi\u1ec7c s\u1eed d\u1ee5ng\u00a0<strong>SSL<\/strong>\u00a0gi\u00fap\u00a0<strong>t\u0103ng s\u1ef1 tin t\u01b0\u1edfng<\/strong>\u00a0c\u1ee7a kh\u00e1ch h\u00e0ng \u0111\u1ed1i v\u1edbi trang web c\u1ee7a b\u1ea1n. Khi ng\u01b0\u1eddi d\u00f9ng th\u1ea5y r\u1eb1ng trang web c\u00f3 bi\u1ec3u t\u01b0\u1ee3ng\u00a0<strong>\u1ed5 kh\u00f3a<\/strong>\u00a0ho\u1eb7c \u201chttps:\/\/\u201d trong URL, h\u1ecd c\u1ea3m th\u1ea5y an t\u00e2m h\u01a1n khi chia s\u1ebb th\u00f4ng tin c\u00e1 nh\u00e2n ho\u1eb7c th\u1ef1c hi\u1ec7n c\u00e1c giao d\u1ecbch t\u00e0i ch\u00ednh.<\/p>\n<p>C\u00e1c nghi\u00ean c\u1ee9u cho th\u1ea5y ng\u01b0\u1eddi d\u00f9ng c\u00f3 xu h\u01b0\u1edbng\u00a0<strong>tr\u00e1nh xa<\/strong>\u00a0c\u00e1c trang web kh\u00f4ng c\u00f3 SSL, v\u00ec h\u1ecd lo ng\u1ea1i v\u1ec1 s\u1ef1 b\u1ea3o m\u1eadt v\u00e0 t\u00ednh x\u00e1c th\u1ef1c c\u1ee7a trang \u0111\u00f3. M\u1ed9t trang web b\u1ea3o m\u1eadt v\u1edbi SSL c\u00f3 th\u1ec3 gi\u00fap x\u00e2y d\u1ef1ng m\u1ed1i quan h\u1ec7 l\u00e2u d\u00e0i v\u1edbi kh\u00e1ch h\u00e0ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3-Cai-thien-SEO\"><\/span><span id=\"3-Cai-thien-SEO\" class=\"ez-toc-section\"><\/span>3. C\u1ea3i thi\u1ec7n SEO<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Google \u0111\u00e3 x\u00e1c nh\u1eadn r\u1eb1ng ch\u1ee9ng ch\u1ec9 b\u1ea3o m\u1eadt Website <strong>SSL \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn th\u1ee9 h\u1ea1ng SEO<\/strong>. C\u00e1c trang web s\u1eed d\u1ee5ng\u00a0HTTPS\u00a0(SSL) s\u1ebd \u0111\u01b0\u1ee3c Google \u01b0u ti\u00ean x\u1ebfp h\u1ea1ng cao h\u01a1n trong k\u1ebft qu\u1ea3 t\u00ecm ki\u1ebfm so v\u1edbi c\u00e1c trang web kh\u00f4ng c\u00f3 SSL. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 vi\u1ec7c tri\u1ec3n khai SSL kh\u00f4ng ch\u1ec9 b\u1ea3o v\u1ec7 ng\u01b0\u1eddi d\u00f9ng m\u00e0 c\u00f2n gi\u00fap website c\u1ee7a b\u1ea1n c\u00f3 c\u01a1 h\u1ed9i\u00a0<strong>n\u00e2ng cao th\u1ee9 h\u1ea1ng<\/strong>\u00a0tr\u00ean Google.<\/p>\n<p>V\u00ed d\u1ee5, n\u1ebfu b\u1ea1n l\u00e0 ch\u1ee7 m\u1ed9t\u00a0<a href=\"https:\/\/interdata.vn\/blog\/blog-la-gi\/\">blog<\/a>\u00a0ho\u1eb7c c\u1eeda h\u00e0ng tr\u1ef1c tuy\u1ebfn, c\u00e0i \u0111\u1eb7t SSL kh\u00f4ng ch\u1ec9 b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u ng\u01b0\u1eddi d\u00f9ng m\u00e0 c\u00f2n gi\u00fap b\u1ea1n c\u00f3 c\u01a1 h\u1ed9i c\u1ea1nh tranh t\u1ed1t h\u01a1n trong k\u1ebft qu\u1ea3 t\u00ecm ki\u1ebfm.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4-Tuan-thu-cac-tieu-chuan-bao-mat\"><\/span><span id=\"4-Tuan-thu-cac-tieu-chuan-bao-mat\" class=\"ez-toc-section\"><\/span>4. Tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n b\u1ea3o m\u1eadt<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Vi\u1ec7c s\u1eed d\u1ee5ng SSL c\u0169ng gi\u00fap trang web c\u1ee7a b\u1ea1n tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n b\u1ea3o m\u1eadt qu\u1ed1c t\u1ebf. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c website y\u00eau c\u1ea7u\u00a0<strong>tu\u00e2n th\u1ee7 PCI-DSS<\/strong>\u00a0(ti\u00eau chu\u1ea9n b\u1ea3o m\u1eadt th\u1ebb thanh to\u00e1n) ho\u1eb7c c\u00e1c quy \u0111\u1ecbnh b\u1ea3o m\u1eadt c\u1ee7a ng\u00e0nh c\u00f4ng nghi\u1ec7p t\u00e0i ch\u00ednh.<\/p>\n<p>N\u1ebfu b\u1ea1n kh\u00f4ng s\u1eed d\u1ee5ng SSL, b\u1ea1n c\u00f3 th\u1ec3 g\u1eb7p r\u1ee7i ro v\u1ec1 vi\u1ec7c b\u1ecb ph\u1ea1t ho\u1eb7c m\u1ea5t \u0111i quy\u1ec1n truy c\u1eadp v\u00e0o c\u00e1c d\u1ecbch v\u1ee5 thanh to\u00e1n ho\u1eb7c ng\u00e2n h\u00e0ng tr\u1ef1c tuy\u1ebfn.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Dau-hieu-nhan-biet-website-co-SSL\"><\/span><strong>D\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft website c\u00f3 SSL<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 m\u1ed9t ng\u01b0\u1eddi d\u00f9ng th\u00f4ng th\u01b0\u1eddng bi\u1ebft \u0111\u01b0\u1ee3c m\u1ed9t website c\u00f3 an to\u00e0n hay kh\u00f4ng? R\u1ea5t \u0111\u01a1n gi\u1ea3n, ch\u1ec9 c\u1ea7n ch\u00fa \u00fd \u0111\u1ebfn ba d\u1ea5u hi\u1ec7u sau tr\u00ean thanh \u0111\u1ecba ch\u1ec9 c\u1ee7a tr\u00ecnh duy\u1ec7t:<\/p>\n<ol>\n<li><strong>Ti\u1ec1n t\u1ed1 HTTPS:<\/strong> Thay v\u00ec <code>http:\/\/<\/code>, \u0111\u1ecba ch\u1ec9 trang web s\u1ebd b\u1eaft \u0111\u1ea7u b\u1eb1ng <code>https:\/\/<\/code>. Ch\u1eef &#8216;S&#8217; \u1edf cu\u1ed1i l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a &#8220;Secure&#8221; (An to\u00e0n).<\/li>\n<li><strong>Bi\u1ec3u t\u01b0\u1ee3ng \u1ed5 kh\u00f3a:<\/strong> M\u1ed9t bi\u1ec3u t\u01b0\u1ee3ng \u1ed5 kh\u00f3a nh\u1ecf s\u1ebd xu\u1ea5t hi\u1ec7n ngay b\u00ean tr\u00e1i \u0111\u1ecba ch\u1ec9 web. \u0110\u00e2y l\u00e0 d\u1ea5u hi\u1ec7u r\u00f5 r\u00e0ng nh\u1ea5t cho th\u1ea5y k\u1ebft n\u1ed1i c\u1ee7a b\u1ea1n \u0111ang \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a.<\/li>\n<li><strong>Th\u00f4ng tin ch\u1ee9ng ch\u1ec9:<\/strong> B\u1ea1n c\u00f3 th\u1ec3 nh\u1ea5p v\u00e0o bi\u1ec3u t\u01b0\u1ee3ng \u1ed5 kh\u00f3a \u0111\u1ec3 xem chi ti\u1ebft v\u1ec1 ch\u1ee9ng ch\u1ec9 SSL, bao g\u1ed3m t\u1ed5 ch\u1ee9c \u0111\u00e3 c\u1ea5p ch\u1ee9ng ch\u1ec9 v\u00e0 th\u1eddi gian hi\u1ec7u l\u1ef1c.<\/li>\n<\/ol>\n<p>Ch\u1ec9 c\u1ea7n d\u00e0nh 2 gi\u00e2y \u0111\u1ec3 ki\u1ec3m tra nh\u1eefng d\u1ea5u hi\u1ec7u website c\u00f3 SSL hay kh\u00f4ng, b\u1ea1n c\u00f3 th\u1ec3 t\u1ef1 b\u1ea3o v\u1ec7 m\u00ecnh kh\u1ecfi c\u00e1c trang web kh\u00f4ng an to\u00e0n.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"So-sanh-SSL-mien-phi-Lets-Encrypt-va-SSL-tra-phi\"><\/span>So s\u00e1nh SSL mi\u1ec5n ph\u00ed (Let&#8217;s Encrypt) v\u00e0 SSL tr\u1ea3 ph\u00ed<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Khi t\u00ecm hi\u1ec3u v\u1ec1 SSL, b\u1ea1n ch\u1eafc ch\u1eafn s\u1ebd nghe \u0111\u1ebfn Let&#8217;s Encrypt, m\u1ed9t nh\u00e0 cung c\u1ea5p <a href=\"https:\/\/interdata.vn\/blog\/free-ssl-la-gi\/\">SSL mi\u1ec5n ph\u00ed<\/a> r\u1ea5t ph\u1ed5 bi\u1ebfn. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn c\u00e2u h\u1ecfi l\u1edbn: &#8220;T\u1ea1i sao ph\u1ea3i mua SSL trong khi c\u00f3 th\u1ec3 d\u00f9ng mi\u1ec5n ph\u00ed?&#8221;. C\u00e2u tr\u1ea3 l\u1eddi n\u1eb1m \u1edf s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 t\u00ednh n\u0103ng, m\u1ee9c \u0111\u1ed9 tin c\u1eady v\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng s\u1eed d\u1ee5ng.<\/p>\n<p>\u0110\u1ec3 c\u00f3 c\u00e1i nh\u00ecn r\u00f5 r\u00e0ng, h\u00e3y xem b\u1ea3ng so s\u00e1nh SSL d\u01b0\u1edbi \u0111\u00e2y:<br \/>\n<!-- B\u1ea3ng HTML inline CSS \u0111\u1ec3 ch\u00e8n v\u00e0o b\u00e0i vi\u1ebft WordPress. M\u00e0u ch\u1ee7 \u0111\u1ea1o: #0D6EFD --><\/p>\n<table style=\"width: 100%; border-collapse: collapse; font-family: Arial, Helvetica, sans-serif; max-width: 100%; box-shadow: 0 1px 3px rgba(13,110,253,0.08);\" role=\"table\">\n<thead>\n<tr>\n<th style=\"background: #0d6efd; color: #ffffff; padding: 12px 14px; border: 1px solid #e6eefc; font-size: 15px; text-align: center;\">Ti\u00eau ch\u00ed<\/th>\n<th style=\"background: #0d6efd; color: #ffffff; padding: 12px 14px; border: 1px solid #e6eefc; font-size: 15px; text-align: center;\">SSL Mi\u1ec5n ph\u00ed (Let&#8217;s Encrypt)<\/th>\n<th style=\"background: #0d6efd; color: #ffffff; padding: 12px 14px; border: 1px solid #e6eefc; font-size: 15px; text-align: center;\">SSL Tr\u1ea3 ph\u00ed (Comodo, GeoTrust, DigiCert&#8230;)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background: #ffffff;\">\n<td style=\"padding: 12px 14px; border: 1px solid #e6eefc; vertical-align: top;\">M\u1ee9c \u0111\u1ed9 x\u00e1c th\u1ef1c<\/td>\n<td style=\"padding: 12px 14px; border: 1px solid #e6eefc; vertical-align: top;\">Ch\u1ec9 c\u00f3 <strong>Domain Validation (DV)<\/strong> &#8211; X\u00e1c th\u1ef1c t\u00ean mi\u1ec1n.<\/td>\n<td style=\"padding: 12px 14px; border: 1px solid #e6eefc; vertical-align: top;\">Cung c\u1ea5p \u0111\u1ea7y \u0111\u1ee7: <strong>DV, OV (X\u00e1c th\u1ef1c t\u1ed5 ch\u1ee9c), EV (X\u00e1c th\u1ef1c m\u1edf r\u1ed9ng)<\/strong>.<\/td>\n<\/tr>\n<tr style=\"background: #f8fbff;\">\n<td style=\"padding: 12px 14px; border: 1px solid #e6eefc; vertical-align: top;\">M\u1ee9c \u0111\u1ed9 tin c\u1eady<\/td>\n<td style=\"padding: 12px 14px; border: 1px solid #e6eefc; vertical-align: top;\">C\u01a1 b\u1ea3n. Kh\u00f4ng hi\u1ec3n th\u1ecb th\u00f4ng tin doanh nghi\u1ec7p.<\/td>\n<td style=\"padding: 12px 14px; border: 1px solid #e6eefc; vertical-align: top;\">Cao h\u01a1n. OV\/EV SSL hi\u1ec3n th\u1ecb t\u00ean c\u00f4ng ty \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c minh, t\u0103ng uy t\u00edn t\u1ed1i \u0111a.<\/td>\n<\/tr>\n<tr style=\"background: #ffffff;\">\n<td style=\"padding: 12px 14px; border: 1px solid #e6eefc; vertical-align: top;\">Th\u1eddi h\u1ea1n<\/td>\n<td style=\"padding: 12px 14px; border: 1px solid #e6eefc; vertical-align: top;\">90 ng\u00e0y, ph\u1ea3i gia h\u1ea1n li\u00ean t\u1ee5c.<\/td>\n<td style=\"padding: 12px 14px; border: 1px solid #e6eefc; vertical-align: top;\">1 n\u0103m, qu\u1ea3n l\u00fd d\u1ec5 d\u00e0ng h\u01a1n.<\/td>\n<\/tr>\n<tr style=\"background: #f8fbff;\">\n<td style=\"padding: 12px 14px; border: 1px solid #e6eefc; vertical-align: top;\">H\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt<\/td>\n<td style=\"padding: 12px 14px; border: 1px solid #e6eefc; vertical-align: top;\">Kh\u00f4ng c\u00f3. Ph\u1ea3i t\u1ef1 t\u00ecm hi\u1ec3u qua c\u00e1c di\u1ec5n \u0111\u00e0n c\u1ed9ng \u0111\u1ed3ng.<\/td>\n<td style=\"padding: 12px 14px; border: 1px solid #e6eefc; vertical-align: top;\">C\u00f3 \u0111\u1ed9i ng\u0169 h\u1ed7 tr\u1ee3 chuy\u00ean nghi\u1ec7p 24\/7 t\u1eeb nh\u00e0 cung c\u1ea5p.<\/td>\n<\/tr>\n<tr style=\"background: #ffffff;\">\n<td style=\"padding: 12px 14px; border: 1px solid #e6eefc; vertical-align: top;\">B\u1ea3o hi\u1ec3m<\/td>\n<td style=\"padding: 12px 14px; border: 1px solid #e6eefc; vertical-align: top;\">Kh\u00f4ng c\u00f3.<\/td>\n<td style=\"padding: 12px 14px; border: 1px solid #e6eefc; vertical-align: top;\">C\u00f3 ch\u00ednh s\u00e1ch b\u1ea3o hi\u1ec3m (warranty), b\u1ed3i th\u01b0\u1eddng n\u1ebfu c\u00f3 thi\u1ec7t h\u1ea1i do l\u1ed7i ch\u1ee9ng ch\u1ec9.<\/td>\n<\/tr>\n<tr style=\"background: #f8fbff;\">\n<td style=\"padding: 12px 14px; border: 1px solid #e6eefc; vertical-align: top;\">Lo\u1ea1i ch\u1ee9ng ch\u1ec9<\/td>\n<td style=\"padding: 12px 14px; border: 1px solid #e6eefc; vertical-align: top;\">Ch\u1ec9 c\u00f3 <strong>Single Domain<\/strong> v\u00e0 <strong>Wildcard<\/strong> (v\u1edbi c\u1ea5u h\u00ecnh ph\u1ee9c t\u1ea1p h\u01a1n).<\/td>\n<td style=\"padding: 12px 14px; border: 1px solid #e6eefc; vertical-align: top;\">\u0110\u1ea7y \u0111\u1ee7 c\u00e1c lo\u1ea1i: <strong>Single, Wildcard, Multi-Domain (SAN\/UCC)<\/strong>.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"Khi-nao-nen-dung-SSL-mien-phi\"><\/span><strong>Khi n\u00e0o n\u00ean d\u00f9ng SSL mi\u1ec5n ph\u00ed?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>S\u1eed d\u1ee5ng ch\u1ee9ng ch\u1ec9 b\u1ea3o m\u1eadt SSL Website mi\u1ec5n ph\u00ed l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn tuy\u1ec7t v\u1eddi cho:<\/p>\n<ul>\n<li>C\u00e1c website c\u00e1 nh\u00e2n, blog, trang portfolio.<\/li>\n<li>C\u00e1c d\u1ef1 \u00e1n phi th\u01b0\u01a1ng m\u1ea1i, kh\u00f4ng thu th\u1eadp d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m.<\/li>\n<li>Giai \u0111o\u1ea1n ph\u00e1t tri\u1ec3n v\u00e0 th\u1eed nghi\u1ec7m website tr\u01b0\u1edbc khi ra m\u1eaft.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Khi-nao-bat-buoc-phai-dung-SSL-tra-phi\"><\/span><strong>Khi n\u00e0o b\u1eaft bu\u1ed9c ph\u1ea3i d\u00f9ng SSL tr\u1ea3 ph\u00ed?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>B\u1ea1n n\u00ean \u0111\u1ea7u t\u01b0 v\u00e0o SSL tr\u1ea3 ph\u00ed n\u1ebfu website c\u1ee7a b\u1ea1n thu\u1ed9c c\u00e1c tr\u01b0\u1eddng h\u1ee3p sau:<\/p>\n<ul>\n<li>Website th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed, trang b\u00e1n h\u00e0ng c\u00f3 c\u1ed5ng thanh to\u00e1n.<\/li>\n<li>Website c\u1ee7a doanh nghi\u1ec7p, c\u00f4ng ty c\u1ea7n x\u00e2y d\u1ef1ng h\u00ecnh \u1ea3nh chuy\u00ean nghi\u1ec7p v\u00e0 \u0111\u00e1ng tin c\u1eady.<\/li>\n<li>B\u1ea5t k\u1ef3 trang web n\u00e0o thu th\u1eadp th\u00f4ng tin c\u00e1 nh\u00e2n c\u1ee7a ng\u01b0\u1eddi d\u00f9ng (t\u00e0i kho\u1ea3n, m\u1eadt kh\u1ea9u, th\u00f4ng tin li\u00ean h\u1ec7).<\/li>\n<li>Khi b\u1ea1n c\u1ea7n s\u1ef1 h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt nhanh ch\u00f3ng v\u00e0 ch\u00ednh s\u00e1ch b\u1ea3o hi\u1ec3m \u0111\u1ec3 y\u00ean t\u00e2m kinh doanh.<\/li>\n<\/ul>\n<p>Vi\u1ec7c t\u00ecm m\u1ed9t \u0111\u01a1n v\u1ecb cung c\u1ea5p ch\u1ee9ng ch\u1ec9 b\u1ea3o m\u1eadt <strong>SSL gi\u00e1 r\u1ebb<\/strong> nh\u01b0ng v\u1eabn \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 h\u1ed7 tr\u1ee3 t\u1ed1t l\u00e0 ho\u00e0n to\u00e0n c\u00f3 th\u1ec3.<\/p>\n<div class=\"highlight-cta-box\">\n<p><span style=\"font-size: 120%;\"><strong><span style=\"color: #ed1c24;\">\ud83d\udd10 Hosting t\u00edch h\u1ee3p SSL mi\u1ec5n ph\u00ed \u2013 K\u00edch ho\u1ea1t l\u00e0 b\u1ea3o m\u1eadt ngay<\/span><\/strong><\/span><br \/>\nHosting InterData \u0111\u01b0\u1ee3c t\u1eb7ng SSL mi\u1ec5n ph\u00ed ngay t\u1eeb khi kh\u1edfi t\u1ea1o, gi\u00fap m\u00e3 h\u00f3a d\u1eef li\u1ec7u an to\u00e0n m\u00e0 kh\u00f4ng c\u1ea7n c\u00e0i \u0111\u1eb7t ph\u1ee9c t\u1ea1p hay tr\u1ea3 th\u00eam ph\u00ed.<br \/>\n<a href=\"https:\/\/interdata.vn\/thue-hosting\/\" class=\"button primary is-primary is-medium\"  >\n\t\t<span>Tham kh\u1ea3o b\u1ea3ng gi\u00e1 d\u1ecbch v\u1ee5 Hosting<\/span>\n\t<\/a>\n\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"Su-khac-biet-giua-chung-chi-SSL-va-TLS\"><\/span><strong>S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa ch\u1ee9ng ch\u1ec9 SSL v\u00e0 TLS<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa ch\u1ee9ng ch\u1ec9 b\u1ea3o m\u1eadt SSL v\u00e0 TLS l\u00e0 ch\u1ee7 y\u1ebfu do TLS l\u00e0 phi\u00ean b\u1ea3n n\u00e2ng c\u1ea5p, c\u1ea3i ti\u1ebfn giao th\u1ee9c SSL ban \u0111\u1ea7u. SSL (Secure Sockets Layer) l\u00e0 giao th\u1ee9c b\u1ea3o m\u1eadt ban \u0111\u1ea7u ph\u00e1t tri\u1ec3n t\u1eeb n\u0103m 1994, v\u1edbi c\u00e1c phi\u00ean b\u1ea3n t\u1eeb 1.0 \u0111\u1ebfn 3.0, nay \u0111\u00e3 l\u1ed7i th\u1eddi v\u00e0 kh\u00f4ng c\u00f2n \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb s\u1eed d\u1ee5ng.<\/p>\n<p>TLS (Transport Layer Security) ra \u0111\u1eddi sau t\u1eeb n\u0103m 1999, l\u00e0 phi\u00ean b\u1ea3n n\u00e2ng c\u1ea5p c\u1ee7a SSL v\u1edbi nhi\u1ec1u c\u1ea3i ti\u1ebfn v\u1ec1 b\u1ea3o m\u1eadt v\u00e0 hi\u1ec7u su\u1ea5t, hi\u1ec7n c\u00f3 c\u00e1c phi\u00ean b\u1ea3n t\u1eeb 1.0 \u0111\u1ebfn 1.3 v\u00e0 \u0111ang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn trong b\u1ea3o m\u1eadt website.<\/p>\n<p><strong>M\u1ed9t s\u1ed1 \u0111i\u1ec3m kh\u00e1c bi\u1ec7t ch\u00ednh:<\/strong><\/p>\n<ul>\n<li>M\u1ee9c \u0111\u1ed9 b\u1ea3o m\u1eadt: TLS cao h\u01a1n SSL do s\u1eed d\u1ee5ng c\u00e1c thu\u1eadt to\u00e1n m\u00e3 h\u00f3a hi\u1ec7n \u0111\u1ea1i v\u00e0 an to\u00e0n h\u01a1n.<\/li>\n<li>Qu\u00e1 tr\u00ecnh b\u1eaft tay (handshake): TLS \u0111\u01a1n gi\u1ea3n v\u00e0 nhanh h\u01a1n so v\u1edbi SSL.<\/li>\n<li>Thu\u1eadt to\u00e1n m\u00e3 h\u00f3a: SSL d\u00f9ng c\u00e1c thu\u1eadt to\u00e1n l\u1ed7i th\u1eddi, TLS d\u00f9ng c\u00e1c thu\u1eadt to\u00e1n c\u1ea3i ti\u1ebfn.<\/li>\n<li>Th\u00f4ng b\u00e1o b\u00e1o \u0111\u1ed9ng (alert): TLS c\u00f3 nhi\u1ec1u lo\u1ea1i v\u00e0 \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a, trong khi SSL ch\u1ec9 c\u00f3 hai lo\u1ea1i v\u00e0 kh\u00f4ng m\u00e3 h\u00f3a.<\/li>\n<li>T\u00ecnh tr\u1ea1ng s\u1eed d\u1ee5ng: SSL kh\u00f4ng c\u00f2n \u0111\u01b0\u1ee3c d\u00f9ng, trong khi TLS l\u00e0 giao th\u1ee9c b\u1ea3o m\u1eadt ph\u1ed5 bi\u1ebfn nh\u1ea5t hi\u1ec7n nay.<\/li>\n<\/ul>\n<p>V\u1ec1 ch\u1ee9ng ch\u1ec9 b\u1ea3o m\u1eadt, thu\u1eadt ng\u1eef &#8220;ch\u1ee9ng ch\u1ec9 SSL website&#8221; v\u1eabn c\u00f2n ph\u1ed5 bi\u1ebfn nh\u01b0ng th\u1ef1c t\u1ebf c\u00e1c ch\u1ee9ng ch\u1ec9 b\u1ea3o m\u1eadt hi\u1ec7n \u0111\u1ea1i s\u1eed d\u1ee5ng giao th\u1ee9c TLS \u0111\u1ec3 m\u00e3 h\u00f3a k\u1ebft n\u1ed1i. Ch\u1ee9ng ch\u1ec9 SSL\/TLS l\u00e0 t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt s\u1ed1 x\u00e1c th\u1ef1c danh t\u00ednh trang web v\u00e0 cho ph\u00e9p k\u1ebft n\u1ed1i an to\u00e0n gi\u1eefa m\u00e1y ch\u1ee7 v\u00e0 tr\u00ecnh duy\u1ec7t b\u1eb1ng c\u00e1ch m\u00e3 h\u00f3a d\u1eef li\u1ec7u truy\u1ec1n t\u1ea3i.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"6-Loai-chung-chi-SSL\"><\/span>6 Lo\u1ea1i ch\u1ee9ng ch\u1ec9 SSL<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Ch\u1ee9ng ch\u1ec9 b\u1ea3o m\u1eadt SSL c\u00f3 ba lo\u1ea1i ch\u00ednh: <strong>Domain Validation (DV)<\/strong>, <strong>Organization Validation (OV)<\/strong> v\u00e0 <strong>Extended Validation (EV)<\/strong>. M\u1ed7i lo\u1ea1i c\u00f3 m\u1ee9c \u0111\u1ed9 b\u1ea3o m\u1eadt v\u00e0 y\u00eau c\u1ea7u x\u00e1c th\u1ef1c kh\u00e1c nhau, t\u00f9y thu\u1ed9c v\u00e0o nhu c\u1ea7u v\u00e0 m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1-Domain-Validation-DV\"><\/span>1. Domain Validation (DV)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>DV SSL<\/strong> l\u00e0 lo\u1ea1i ch\u1ee9ng ch\u1ec9 c\u01a1 b\u1ea3n nh\u1ea5t v\u00e0 d\u1ec5 d\u00e0ng nh\u1ea5t \u0111\u1ec3 c\u1ea5p. N\u00f3 ch\u1ec9 y\u00eau c\u1ea7u x\u00e1c minh r\u1eb1ng ch\u1ee7 s\u1edf h\u1eefu t\u00ean mi\u1ec1n c\u00f3 quy\u1ec1n ki\u1ec3m so\u00e1t t\u00ean mi\u1ec1n \u0111\u00f3. \u0110\u00e2y l\u00e0 l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn cho c\u00e1c website c\u00e1 nh\u00e2n ho\u1eb7c c\u00e1c trang web kh\u00f4ng y\u00eau c\u1ea7u x\u00e1c th\u1ef1c t\u1ed5 ch\u1ee9c.<\/p>\n<p>Khi b\u1ea1n c\u00e0i \u0111\u1eb7t <strong>DV SSL<\/strong>, ch\u1ec9 c\u1ea7n ch\u1ee9ng minh quy\u1ec1n s\u1edf h\u1eefu t\u00ean mi\u1ec1n th\u00f4ng qua email ho\u1eb7c file x\u00e1c minh tr\u00ean website. Lo\u1ea1i ch\u1ee9ng ch\u1ec9 n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c trang web kh\u00f4ng c\u00f3 y\u00eau c\u1ea7u cao v\u1ec1 b\u1ea3o m\u1eadt ho\u1eb7c b\u1ea3o v\u1ec7 th\u00f4ng tin ng\u01b0\u1eddi d\u00f9ng nh\u1ea1y c\u1ea3m.<\/p>\n<p><strong>V\u00ed d\u1ee5<\/strong>: N\u1ebfu b\u1ea1n s\u1edf h\u1eefu m\u1ed9t blog c\u00e1 nh\u00e2n, ch\u1ee9ng ch\u1ec9 DV SSL l\u00e0 \u0111\u1ee7 \u0111\u1ec3 b\u1ea3o v\u1ec7 trang web c\u1ee7a b\u1ea1n kh\u1ecfi c\u00e1c m\u1ed1i \u0111e d\u1ecda c\u01a1 b\u1ea3n v\u00e0 gi\u00fap ng\u01b0\u1eddi d\u00f9ng nh\u1eadn di\u1ec7n r\u1eb1ng trang web c\u1ee7a b\u1ea1n l\u00e0 an to\u00e0n.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2-Organization-Validation-OV\"><\/span>2. Organization Validation (OV)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>OV SSL<\/strong> y\u00eau c\u1ea7u x\u00e1c minh c\u1ea3 t\u00ean mi\u1ec1n v\u00e0 th\u00f4ng tin t\u1ed5 ch\u1ee9c (doanh nghi\u1ec7p) tr\u01b0\u1edbc khi c\u1ea5p ch\u1ee9ng ch\u1ec9. Lo\u1ea1i ch\u1ee9ng ch\u1ec9 n\u00e0y kh\u00f4ng ch\u1ec9 ch\u1ee9ng minh quy\u1ec1n s\u1edf h\u1eefu t\u00ean mi\u1ec1n m\u00e0 c\u00f2n x\u00e1c th\u1ef1c t\u00ednh h\u1ee3p ph\u00e1p c\u1ee7a t\u1ed5 ch\u1ee9c \u0111\u1ee9ng sau trang web. \u0110\u00e2y l\u00e0 l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p cho c\u00e1c website c\u1ee7a doanh nghi\u1ec7p, t\u1ed5 ch\u1ee9c ho\u1eb7c c\u00e1c trang web c\u00f3 giao d\u1ecbch tr\u1ef1c tuy\u1ebfn.<\/p>\n<p>Qu\u00e1 tr\u00ecnh x\u00e1c th\u1ef1c OV SSL c\u00f3 th\u1ec3 m\u1ea5t t\u1eeb v\u00e0i gi\u1edd \u0111\u1ebfn v\u00e0i ng\u00e0y, t\u00f9y thu\u1ed9c v\u00e0o m\u1ee9c \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a vi\u1ec7c x\u00e1c minh t\u1ed5 ch\u1ee9c. Sau khi \u0111\u01b0\u1ee3c c\u1ea5p, ch\u1ee9ng ch\u1ec9 OV SSL s\u1ebd hi\u1ec3n th\u1ecb th\u00f4ng tin v\u1ec1 t\u1ed5 ch\u1ee9c ngay tr\u00ean trang web, gi\u00fap kh\u00e1ch h\u00e0ng y\u00ean t\u00e2m h\u01a1n khi giao d\u1ecbch.<\/p>\n<p><strong>V\u00ed d\u1ee5<\/strong>: C\u00e1c c\u1eeda h\u00e0ng tr\u1ef1c tuy\u1ebfn ho\u1eb7c website c\u1ee7a c\u00f4ng ty s\u1ebd s\u1eed d\u1ee5ng ch\u1ee9ng ch\u1ec9 OV SSL \u0111\u1ec3 t\u1ea1o d\u1ef1ng l\u00f2ng tin v\u1edbi kh\u00e1ch h\u00e0ng v\u00e0 b\u1ea3o v\u1ec7 c\u00e1c giao d\u1ecbch t\u00e0i ch\u00ednh.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3-Extended-Validation-EV\"><\/span>3. Extended Validation (EV)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>EV SSL<\/strong> l\u00e0 lo\u1ea1i ch\u1ee9ng ch\u1ec9 b\u1ea3o m\u1eadt cao nh\u1ea5t. N\u00f3 y\u00eau c\u1ea7u x\u00e1c th\u1ef1c chi ti\u1ebft v\u1ec1 t\u1ed5 ch\u1ee9c, bao g\u1ed3m c\u1ea3 ki\u1ec3m tra ph\u00e1p l\u00fd v\u00e0 t\u00e0i ch\u00ednh. Khi c\u00e0i \u0111\u1eb7t ch\u1ee9ng ch\u1ec9 <strong>EV SSL<\/strong>, tr\u00ecnh duy\u1ec7t s\u1ebd hi\u1ec3n th\u1ecb <strong>thanh \u0111\u1ecba ch\u1ec9 m\u00e0u xanh<\/strong> v\u1edbi t\u00ean t\u1ed5 ch\u1ee9c v\u00e0 \u0111\u1ecba ch\u1ec9 t\u1ed5 ch\u1ee9c, gi\u00fap ng\u01b0\u1eddi d\u00f9ng d\u1ec5 d\u00e0ng nh\u1eadn di\u1ec7n trang web l\u00e0 h\u1ee3p ph\u00e1p v\u00e0 b\u1ea3o m\u1eadt cao.<\/p>\n<p>EV SSL l\u00e0 l\u1ef1a ch\u1ecdn t\u1ed1i \u01b0u cho c\u00e1c trang web y\u00eau c\u1ea7u b\u1ea3o m\u1eadt nghi\u00eam ng\u1eb7t, \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c trang web li\u00ean quan \u0111\u1ebfn ng\u00e2n h\u00e0ng, t\u00e0i ch\u00ednh ho\u1eb7c c\u00e1c d\u1ecbch v\u1ee5 y\u00eau c\u1ea7u m\u1ee9c \u0111\u1ed9 tin c\u1eady cao t\u1eeb ng\u01b0\u1eddi d\u00f9ng.<\/p>\n<p><strong>V\u00ed d\u1ee5<\/strong>: C\u00e1c ng\u00e2n h\u00e0ng tr\u1ef1c tuy\u1ebfn ho\u1eb7c d\u1ecbch v\u1ee5 thanh to\u00e1n \u0111i\u1ec7n t\u1eed nh\u01b0 PayPal s\u1eed d\u1ee5ng ch\u1ee9ng ch\u1ec9 EV SSL \u0111\u1ec3 b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u c\u1ee7a kh\u00e1ch h\u00e0ng v\u00e0 n\u00e2ng cao s\u1ef1 tin c\u1eady trong giao d\u1ecbch.<\/p>\n<figure id=\"attachment_16698\" aria-describedby=\"caption-attachment-16698\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/08\/cac-loai-chung-chi-ssl.webp\" alt=\"C\u00e1c lo\u1ea1i ch\u1ee9ng ch\u1ec9 SSL\" width=\"900\" height=\"463\" title=\"\"><figcaption id=\"caption-attachment-16698\" class=\"wp-caption-text\">C\u00e1c lo\u1ea1i ch\u1ee9ng ch\u1ec9 SSL<\/figcaption><\/figure>\n<article>\n<div>\n<div>\n<p>Ch\u1ee9ng ch\u1ec9 SSL kh\u00f4ng ch\u1ec9 kh\u00e1c nhau v\u1ec1 m\u1ee9c \u0111\u1ed9 x\u00e1c th\u1ef1c m\u00e0 c\u00f2n \u0111\u01b0\u1ee3c ph\u00e2n chia theo <strong>s\u1ed1 l\u01b0\u1ee3ng t\u00ean mi\u1ec1n c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7<\/strong>. T\u00f9y v\u00e0o nhu c\u1ea7u s\u1eed d\u1ee5ng m\u1ed9t hay nhi\u1ec1u domain\/subdomain, b\u1ea1n c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn lo\u1ea1i SSL ph\u00f9 h\u1ee3p d\u01b0\u1edbi \u0111\u00e2y:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4-Single-Domain-SSL\"><\/span>4. Single Domain SSL<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Single Domain SSL<\/strong> l\u00e0 d\u1ea1ng c\u01a1 b\u1ea3n nh\u1ea5t, ch\u1ec9 \u00e1p d\u1ee5ng cho <strong>m\u1ed9t t\u00ean mi\u1ec1n duy nh\u1ea5t<\/strong>. N\u1ebfu b\u1ea1n s\u1edf h\u1eefu m\u1ed9t website v\u1edbi m\u1ed9t domain ri\u00eang bi\u1ec7t v\u00e0 kh\u00f4ng s\u1eed d\u1ee5ng th\u00eam <a href=\"https:\/\/interdata.vn\/blog\/subdomain-la-gi\/\">subdomain<\/a>, \u0111\u00e2y l\u00e0 ph\u01b0\u01a1ng \u00e1n v\u1eeba \u0111\u1ee7 d\u00f9ng v\u00e0 t\u1ed1i \u01b0u chi ph\u00ed.<\/p>\n<p>M\u1ed9t s\u1ed1 ch\u1ee9ng ch\u1ec9 Single Domain SSL \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn hi\u1ec7n nay g\u1ed3m: <strong>RapidSSL<\/strong> v\u00e0 <strong>PositiveSSL<\/strong>.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"5-Wildcard-SSL\"><\/span>5. Wildcard SSL<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Trong tr\u01b0\u1eddng h\u1ee3p website c\u00f3 nhi\u1ec1u t\u00ean mi\u1ec1n con nh\u01b0 <em>blog.domain.com<\/em> ho\u1eb7c <em>shop.domain.com<\/em>, <strong>Wildcard SSL<\/strong> s\u1ebd ph\u00f9 h\u1ee3p h\u01a1n. Ch\u1ec9 c\u1ea7n m\u1ed9t ch\u1ee9ng ch\u1ec9 duy nh\u1ea5t, b\u1ea1n c\u00f3 th\u1ec3 b\u1ea3o m\u1eadt to\u00e0n b\u1ed9 domain ch\u00ednh c\u00f9ng t\u1ea5t c\u1ea3 subdomain \u0111i k\u00e8m m\u00e0 kh\u00f4ng ph\u1ea3i mua ri\u00eang t\u1eebng SSL.<\/p>\n<p>C\u00e1c d\u00f2ng Wildcard SSL th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn nhi\u1ec1u hi\u1ec7n nay l\u00e0: <strong>RapidSSL Wildcard<\/strong> v\u00e0 <strong>PositiveSSL Wildcard<\/strong>.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"6-Multi-Domain-SSL-SAN-SSL\"><\/span>6. Multi-Domain SSL (SAN SSL)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Multi-Domain SSL<\/strong>, c\u00f2n g\u1ecdi l\u00e0 <strong><a href=\"https:\/\/interdata.vn\/blog\/multi-domain-ssl-la-gi\/\">SAN SSL<\/a><\/strong>, cho ph\u00e9p b\u1ea3o v\u1ec7 nhi\u1ec1u t\u00ean mi\u1ec1n kh\u00e1c nhau ch\u1ec9 v\u1edbi m\u1ed9t ch\u1ee9ng ch\u1ec9 duy nh\u1ea5t. \u0110\u00e2y l\u00e0 gi\u1ea3i ph\u00e1p th\u00edch h\u1ee3p cho doanh nghi\u1ec7p c\u00f3 nhi\u1ec1u website ho\u1eb7c nhi\u1ec1u d\u1ecbch v\u1ee5 v\u1eadn h\u00e0nh tr\u00ean c\u00e1c domain ri\u00eang bi\u1ec7t.<\/p>\n<p>Vi\u1ec7c s\u1eed d\u1ee5ng SAN SSL gi\u00fap ti\u1ebft ki\u1ec7m chi ph\u00ed \u0111\u00e1ng k\u1ec3 v\u00e0 \u0111\u1ed3ng th\u1eddi \u0111\u01a1n gi\u1ea3n h\u00f3a qu\u00e1 tr\u00ecnh qu\u1ea3n l\u00fd ch\u1ee9ng ch\u1ec9 b\u1ea3o m\u1eadt.<\/p>\n<\/div>\n<\/div>\n<\/article>\n<h2><span class=\"ez-toc-section\" id=\"Cac-thanh-phan-cua-chung-chi-bao-mat-SSL\"><\/span>C\u00e1c th\u00e0nh ph\u1ea7n c\u1ee7a ch\u1ee9ng ch\u1ec9 b\u1ea3o m\u1eadt SSL<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Ch\u1ee9ng ch\u1ec9 SSL bao g\u1ed3m nhi\u1ec1u th\u00e0nh ph\u1ea7n quan tr\u1ecdng gi\u00fap x\u00e1c th\u1ef1c v\u00e0 m\u00e3 h\u00f3a th\u00f4ng tin. Nh\u1eefng th\u00e0nh ph\u1ea7n ch\u00ednh trong ch\u1ee9ng ch\u1ec9 SSL bao g\u1ed3m <strong>public key<\/strong>, <strong>private key<\/strong>, <strong>certificate authority (CA)<\/strong>, v\u00e0 <strong>subject information<\/strong>.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/08\/cac-thanh-phan-cua-ssl.webp\" alt=\"C\u00e1c th\u00e0nh ph\u1ea7n c\u1ee7a ch\u1ee9ng ch\u1ec9 b\u1ea3o m\u1eadt SSL\" width=\"900\" height=\"600\" title=\"\"><\/p>\n<h3><span class=\"ez-toc-section\" id=\"1-Public-Key-va-Private-Key\"><\/span>1. Public Key v\u00e0 Private Key<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Public Key<\/strong> (kh\u00f3a c\u00f4ng khai) v\u00e0 <strong>Private Key<\/strong> (kh\u00f3a ri\u00eang t\u01b0) l\u00e0 hai th\u00e0nh ph\u1ea7n quan tr\u1ecdng nh\u1ea5t trong h\u1ec7 th\u1ed1ng m\u00e3 h\u00f3a SSL. Khi k\u1ebft n\u1ed1i gi\u1eefa tr\u00ecnh duy\u1ec7t v\u00e0 m\u00e1y ch\u1ee7 \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a b\u1eb1ng SSL, public key \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 m\u00e3 h\u00f3a d\u1eef li\u1ec7u, trong khi private key gi\u1ea3i m\u00e3 d\u1eef li\u1ec7u t\u1ea1i m\u00e1y ch\u1ee7.<\/p>\n<p><strong>Public Key<\/strong> \u0111\u01b0\u1ee3c chia s\u1ebb c\u00f4ng khai v\u00e0 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u1ec3 m\u00e3 h\u00f3a th\u00f4ng tin, trong khi <strong>Private Key<\/strong> \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 v\u00e0 ch\u1ec9 c\u00f3 m\u00e1y ch\u1ee7 s\u1edf h\u1eefu m\u1edbi c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u1ec3 gi\u1ea3i m\u00e3 th\u00f4ng tin.<\/p>\n<p><strong>V\u00ed d\u1ee5<\/strong>: Khi b\u1ea1n nh\u1eadp m\u1eadt kh\u1ea9u tr\u00ean m\u1ed9t trang web c\u00f3 SSL, public key s\u1ebd m\u00e3 h\u00f3a m\u1eadt kh\u1ea9u tr\u01b0\u1edbc khi g\u1eedi \u0111i. Sau \u0111\u00f3, m\u00e1y ch\u1ee7 d\u00f9ng private key \u0111\u1ec3 gi\u1ea3i m\u00e3 m\u1eadt kh\u1ea9u \u0111\u00f3.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2-Certificate-Authority-CA\"><\/span>2. Certificate Authority (CA)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Certificate Authority<\/strong> (CA) l\u00e0 t\u1ed5 ch\u1ee9c c\u00f3 th\u1ea9m quy\u1ec1n c\u1ea5p ch\u1ee9ng ch\u1ec9 SSL. CA \u0111\u1ea3m b\u1ea3o r\u1eb1ng ch\u1ee9ng ch\u1ec9 SSL \u0111\u01b0\u1ee3c c\u1ea5p cho t\u1ed5 ch\u1ee9c ho\u1eb7c c\u00e1 nh\u00e2n h\u1ee3p ph\u00e1p, th\u00f4ng qua qu\u00e1 tr\u00ecnh x\u00e1c th\u1ef1c. CA c\u0169ng gi\u00fap x\u00e1c th\u1ef1c danh t\u00ednh c\u1ee7a website, t\u0103ng c\u01b0\u1eddng s\u1ef1 tin t\u01b0\u1edfng c\u1ee7a ng\u01b0\u1eddi d\u00f9ng.<\/p>\n<p>Ch\u1ee9ng ch\u1ec9 t\u1eeb c\u00e1c CA n\u1ed5i ti\u1ebfng nh\u01b0 <strong>Let&#8217;s Encrypt<\/strong>, <strong>DigiCert<\/strong>, hay <strong>Comodo<\/strong> th\u01b0\u1eddng \u0111\u01b0\u1ee3c c\u00e1c website tin c\u1eady s\u1eed d\u1ee5ng. N\u1ebfu ch\u1ee9ng ch\u1ec9 SSL kh\u00f4ng h\u1ee3p l\u1ec7 ho\u1eb7c kh\u00f4ng \u0111\u01b0\u1ee3c c\u1ea5p b\u1edfi CA \u0111\u00e1ng tin c\u1eady, tr\u00ecnh duy\u1ec7t s\u1ebd c\u1ea3nh b\u00e1o ng\u01b0\u1eddi d\u00f9ng v\u1ec1 nguy c\u01a1 b\u1ea3o m\u1eadt.<\/p>\n<p><strong>V\u00ed d\u1ee5<\/strong>: Khi b\u1ea1n v\u00e0o m\u1ed9t trang web ng\u00e2n h\u00e0ng, ch\u1ee9ng ch\u1ec9 SSL c\u1ee7a website \u0111\u00f3 s\u1ebd \u0111\u01b0\u1ee3c c\u1ea5p b\u1edfi m\u1ed9t CA uy t\u00edn, gi\u00fap b\u1ea1n an t\u00e2m h\u01a1n khi th\u1ef1c hi\u1ec7n giao d\u1ecbch.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3-Subject-Information\"><\/span>3. Subject Information<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Subject Information<\/strong> trong ch\u1ee9ng ch\u1ec9 SSL l\u00e0 th\u00f4ng tin li\u00ean quan \u0111\u1ebfn t\u1ed5 ch\u1ee9c ho\u1eb7c c\u00e1 nh\u00e2n s\u1edf h\u1eefu ch\u1ee9ng ch\u1ec9. Th\u00f4ng tin n\u00e0y bao g\u1ed3m t\u00ean t\u1ed5 ch\u1ee9c, \u0111\u1ecba ch\u1ec9, t\u00ean mi\u1ec1n, v\u00e0 qu\u1ed1c gia. N\u00f3 gi\u00fap ng\u01b0\u1eddi d\u00f9ng nh\u1eadn di\u1ec7n v\u00e0 x\u00e1c th\u1ef1c ch\u1ee7 s\u1edf h\u1eefu c\u1ee7a trang web.<\/p>\n<p>Th\u00f4ng tin n\u00e0y \u0111\u01b0\u1ee3c g\u1eafn li\u1ec1n v\u1edbi ch\u1ee9ng ch\u1ec9 SSL v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ki\u1ec3m tra qua thanh c\u00f4ng c\u1ee5 c\u1ee7a tr\u00ecnh duy\u1ec7t. N\u1ebfu th\u00f4ng tin n\u00e0y kh\u00f4ng ch\u00ednh x\u00e1c, ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 nghi ng\u1edd trang web \u0111\u00f3 v\u00e0 tr\u00e1nh s\u1eed d\u1ee5ng.<\/p>\n<p><strong>V\u00ed d\u1ee5<\/strong>: N\u1ebfu ch\u1ee9ng ch\u1ec9 SSL c\u1ee7a m\u1ed9t ng\u00e2n h\u00e0ng c\u00f3 th\u00f4ng tin v\u1ec1 t\u00ean t\u1ed5 ch\u1ee9c v\u00e0 \u0111\u1ecba ch\u1ec9 r\u00f5 r\u00e0ng, ng\u01b0\u1eddi d\u00f9ng s\u1ebd c\u1ea3m th\u1ea5y y\u00ean t\u00e2m h\u01a1n khi giao d\u1ecbch tr\u1ef1c tuy\u1ebfn.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4-Digital-Signature\"><\/span>4. Digital Signature<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Digital Signature<\/strong> (ch\u1eef k\u00fd \u0111i\u1ec7n t\u1eed) l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a ch\u1ee9ng ch\u1ec9 SSL, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ch\u1ee9ng th\u1ef1c t\u00ednh to\u00e0n v\u1eb9n v\u00e0 x\u00e1c th\u1ef1c c\u1ee7a ch\u1ee9ng ch\u1ec9. Ch\u1eef k\u00fd n\u00e0y do CA t\u1ea1o ra v\u00e0 b\u1ea3o v\u1ec7 b\u1eb1ng private key c\u1ee7a CA. Khi ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp v\u00e0o website, ch\u1eef k\u00fd \u0111i\u1ec7n t\u1eed n\u00e0y gi\u00fap x\u00e1c minh ch\u1ee9ng ch\u1ec9 SSL c\u00f3 h\u1ee3p l\u1ec7 v\u00e0 ch\u01b0a b\u1ecb thay \u0111\u1ed5i.<\/p>\n<p><strong>V\u00ed d\u1ee5<\/strong>: Khi truy c\u1eadp v\u00e0o m\u1ed9t website s\u1eed d\u1ee5ng ch\u1ee9ng ch\u1ec9 EV SSL, ch\u1eef k\u00fd \u0111i\u1ec7n t\u1eed s\u1ebd x\u00e1c nh\u1eadn r\u1eb1ng ch\u1ee9ng ch\u1ec9 n\u00e0y do m\u1ed9t CA uy t\u00edn c\u1ea5p v\u00e0 kh\u00f4ng b\u1ecb s\u1eeda \u0111\u1ed5i.<\/p>\n<div class=\"highlight-cta-box\">\n<p><span style=\"color: #ed1c24; font-size: 120%;\"><strong>\ud83d\ude80 VPS t\u1eb7ng k\u00e8m Let&#8217;s Encrypt SSL \u2013 Linh ho\u1ea1t v\u00e0 an to\u00e0n<\/strong><\/span><\/p>\n<p>VPS InterData \u0111i k\u00e8m <a href=\"https:\/\/interdata.vn\/blog\/lets-encrypt-la-gi\/\">Let\u2019s Encrypt<\/a> SSL mi\u1ec5n ph\u00ed, t\u0103ng \u0111\u1ed9 tin c\u1eady cho website v\u00e0 \u1ee9ng d\u1ee5ng. Ngo\u00e0i ra, c\u00f2n c\u00f3 c\u00e1c g\u00f3i SSL tr\u1ea3 ph\u00ed t\u1eeb th\u01b0\u01a1ng hi\u1ec7u uy t\u00edn d\u00e0nh cho nhu c\u1ea7u b\u1ea3o m\u1eadt n\u00e2ng cao.<br \/>\n<a href=\"https:\/\/interdata.vn\/thue-vps\/\" class=\"button primary is-primary is-medium\"  >\n\t\t<span>Xem b\u1ea3ng gi\u00e1 d\u1ecbch v\u1ee5 VPS<\/span>\n\t<\/a>\n\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"Huong-dan-cach-cai-dat-chung-chi-SSL\"><\/span>H\u01b0\u1edbng d\u1eabn c\u00e1ch c\u00e0i \u0111\u1eb7t ch\u1ee9ng ch\u1ec9 SSL<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<blockquote><p><strong>Xem th\u00eam: <\/strong><a href=\"https:\/\/interdata.vn\/blog\/cai-dat-ssl-tren-cpanel\/\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>H\u01b0\u1edbng d\u1eabn c\u00e0i \u0111\u1eb7t SSL tr\u00ean cPanel Hosting InterData \u0111\u01a1n gi\u1ea3n<\/strong><\/a><\/p>\n<p><strong>Xem th\u00eam:\u00a0<\/strong><a href=\"https:\/\/interdata.vn\/blog\/cai-dat-lets-encrypt-directadmin\/\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>C\u00e1ch C\u00e0i \u0110\u1eb7t Let&#8217;s Encrypt DirectAdmin Mi\u1ec5n Ph\u00ed Ch\u1ee9ng Ch\u1ec9 SSL<\/strong><\/a><\/p><\/blockquote>\n<h2><span class=\"ez-toc-section\" id=\"Cach-kiem-tra-chung-chi-SSL-da-duoc-cai-dat-dung\"><\/span>C\u00e1ch ki\u1ec3m tra ch\u1ee9ng ch\u1ec9 SSL \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t \u0111\u00fang<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 ki\u1ec3m tra xem ch\u1ee9ng ch\u1ec9 SSL website \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t \u0111\u00fang hay ch\u01b0a, b\u1ea1n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n m\u1ed9t s\u1ed1 b\u01b0\u1edbc \u0111\u01a1n gi\u1ea3n nh\u01b0 ki\u1ec3m tra qua tr\u00ecnh duy\u1ec7t web, s\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 ki\u1ec3m tra SSL tr\u1ef1c tuy\u1ebfn ho\u1eb7c qua cPanel. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c c\u00e1ch ki\u1ec3m tra website \u0111\u00e3 c\u00f3 SSL\/TLS ch\u01b0a ph\u1ed5 bi\u1ebfn:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1-Kiem-tra-qua-trinh-duyet\"><\/span>1. Ki\u1ec3m tra qua tr\u00ecnh duy\u1ec7t<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>M\u1ed9t trong nh\u1eefng c\u00e1ch d\u1ec5 d\u00e0ng nh\u1ea5t \u0111\u1ec3 ki\u1ec3m tra SSL l\u00e0 s\u1eed d\u1ee5ng tr\u00ecnh duy\u1ec7t web. N\u1ebfu SSL \u0111\u01b0\u1ee3c c\u00e0i \u0111\u00fang, \u0111\u1ecba ch\u1ec9 website c\u1ee7a b\u1ea1n s\u1ebd b\u1eaft \u0111\u1ea7u v\u1edbi <strong>HTTPS<\/strong> thay v\u00ec <strong>HTTP<\/strong>, v\u00e0 b\u1ea1n s\u1ebd th\u1ea5y bi\u1ec3u t\u01b0\u1ee3ng \u1ed5 kh\u00f3a <strong>k\u00e8m theo<\/strong> \u1edf ph\u00eda tr\u01b0\u1edbc URL.<\/p>\n<p><strong>V\u00ed d\u1ee5<\/strong>: Khi truy c\u1eadp v\u00e0o m\u1ed9t trang web nh\u01b0 <code>https:\/\/www.example.com<\/code>, \u1ed5 kh\u00f3a s\u1ebd xu\u1ea5t hi\u1ec7n, x\u00e1c nh\u1eadn r\u1eb1ng k\u1ebft n\u1ed1i l\u00e0 an to\u00e0n.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2-Su-dung-cong-cu-kiem-tra-SSL-truc-tuyen\"><\/span>2. S\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 ki\u1ec3m tra SSL tr\u1ef1c tuy\u1ebfn<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>C\u00e1c c\u00f4ng c\u1ee5 ki\u1ec3m tra SSL nh\u01b0 <strong>SSL Labs&#8217; SSL Test<\/strong> ho\u1eb7c <strong>Why No Padlock<\/strong> c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n ki\u1ec3m tra chi ti\u1ebft ch\u1ee9ng ch\u1ec9 SSL. C\u00e1c c\u00f4ng c\u1ee5 n\u00e0y s\u1ebd \u0111\u01b0a ra th\u00f4ng tin v\u1ec1 t\u00ecnh tr\u1ea1ng SSL c\u1ee7a website, c\u00f3 bao g\u1ed3m ch\u1ee9ng ch\u1ec9 h\u1ee3p l\u1ec7, th\u1eddi gian h\u1ebft h\u1ea1n v\u00e0 c\u1ea5u h\u00ecnh SSL c\u1ee7a m\u00e1y ch\u1ee7.<\/p>\n<p><strong>V\u00ed d\u1ee5<\/strong>: S\u1eed d\u1ee5ng SSL Labs s\u1ebd cho b\u1ea1n bi\u1ebft ch\u1ee9ng ch\u1ec9 c\u00f3 \u0111\u01b0\u1ee3c c\u00e0i \u0111\u00fang, c\u00f3 b\u1ecb l\u1ed7i kh\u00f4ng v\u00e0 c\u00f3 ph\u00f9 h\u1ee3p v\u1edbi chu\u1ea9n b\u1ea3o m\u1eadt hay kh\u00f4ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3-Kiem-tra-tren-cPanel\"><\/span>3. Ki\u1ec3m tra tr\u00ean cPanel<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>N\u1ebfu b\u1ea1n qu\u1ea3n l\u00fd website qua cPanel, b\u1ea1n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng ki\u1ec3m tra ch\u1ee9ng ch\u1ec9 SSL b\u1eb1ng c\u00e1ch v\u00e0o ph\u1ea7n <strong>SSL\/TLS<\/strong>. Cpanel s\u1ebd hi\u1ec3n th\u1ecb c\u00e1c ch\u1ee9ng ch\u1ec9 \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t v\u00e0 tr\u1ea1ng th\u00e1i c\u1ee7a ch\u00fang.<\/p>\n<p><strong>V\u00ed d\u1ee5<\/strong>: Trong cPanel, n\u1ebfu b\u1ea1n th\u1ea5y th\u00f4ng b\u00e1o &#8220;Certificate is Active&#8221; ho\u1eb7c &#8220;SSL Installed&#8221;, ch\u1ee9ng ch\u1ec9 \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00e0i \u0111\u00fang c\u00e1ch.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4-Kiem-tra-bang-lenh-OpenSSL\"><\/span>4. Ki\u1ec3m tra b\u1eb1ng l\u1ec7nh OpenSSL<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>N\u1ebfu b\u1ea1n quen thu\u1ed9c v\u1edbi d\u00f2ng l\u1ec7nh, c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 <strong>OpenSSL<\/strong> \u0111\u1ec3 ki\u1ec3m tra ch\u1ee9ng ch\u1ec9 SSL. L\u1ec7nh sau s\u1ebd gi\u00fap b\u1ea1n ki\u1ec3m tra:<\/p>\n<p><code>openssl s_client -connect <a href=\"https:\/\/interdata.vn\/blog\/world-wide-web\/\">www<\/a>.example.com:443<\/code><\/p>\n<p>C\u00f4ng c\u1ee5 n\u00e0y s\u1ebd cung c\u1ea5p chi ti\u1ebft v\u1ec1 ch\u1ee9ng ch\u1ec9, bao g\u1ed3m c\u1ea3 ng\u00e0y h\u1ebft h\u1ea1n v\u00e0 danh t\u00ednh c\u1ee7a ch\u1ee9ng ch\u1ec9.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cach-chon-chung-chi-SSL-phu-hop-cho-doanh-nghiep\"><\/span><strong>C\u00e1ch ch\u1ecdn ch\u1ee9ng ch\u1ec9 SSL ph\u00f9 h\u1ee3p cho doanh nghi\u1ec7p<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Vi\u1ec7c <strong>ch\u1ecdn SSL<\/strong> \u0111\u00fang \u0111\u1eafn l\u00e0 m\u1ed9t quy\u1ebft \u0111\u1ecbnh quan tr\u1ecdng. \u0110\u1ec3 kh\u00f4ng b\u1ecb &#8220;ng\u1ee3p&#8221; gi\u1eefa h\u00e0ng lo\u1ea1t l\u1ef1a ch\u1ecdn, h\u00e3y d\u1ef1a v\u00e0o c\u00e1c ti\u00eau ch\u00ed sau:<\/p>\n<ol>\n<li><strong>X\u00e1c \u0111\u1ecbnh lo\u1ea1i h\u00ecnh website:<\/strong>\n<ul>\n<li><strong>Blog, website c\u00e1 nh\u00e2n, trang th\u00f4ng tin:<\/strong> Ch\u1ec9 c\u1ea7n <strong>SSL DV (Domain Validation)<\/strong> l\u00e0 \u0111\u1ee7. Lo\u1ea1i n\u00e0y x\u00e1c th\u1ef1c nhanh, chi ph\u00ed th\u1ea5p.<\/li>\n<li><strong>Website doanh nghi\u1ec7p, trang gi\u1edbi thi\u1ec7u c\u00f4ng ty:<\/strong> N\u00ean s\u1eed d\u1ee5ng <strong>SSL OV (Organization Validation)<\/strong>. Lo\u1ea1i n\u00e0y x\u00e1c th\u1ef1c c\u1ea3 th\u00f4ng tin doanh nghi\u1ec7p, gi\u00fap t\u0103ng \u0111\u1ed9 tin c\u1eady.<\/li>\n<li><strong>Website th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed, t\u00e0i ch\u00ednh, ng\u00e2n h\u00e0ng:<\/strong> B\u1eaft bu\u1ed9c n\u00ean d\u00f9ng <strong>SSL EV (Extended Validation)<\/strong>. \u0110\u00e2y l\u00e0 lo\u1ea1i ch\u1ee9ng ch\u1ec9 c\u00f3 m\u1ee9c \u0111\u1ed9 x\u00e1c th\u1ef1c cao nh\u1ea5t, hi\u1ec3n th\u1ecb t\u00ean c\u00f4ng ty tr\u00ean thanh \u0111\u1ecba ch\u1ec9 m\u00e0u xanh, t\u1ea1o ra s\u1ef1 tin t\u01b0\u1edfng tuy\u1ec7t \u0111\u1ed1i cho kh\u00e1ch h\u00e0ng khi giao d\u1ecbch. \u0110\u00e2y l\u00e0 l\u1ef1a ch\u1ecdn h\u00e0ng \u0111\u1ea7u cho <strong>SSL cho website b\u00e1n h\u00e0ng<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<li><strong>X\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng t\u00ean mi\u1ec1n c\u1ea7n b\u1ea3o v\u1ec7:<\/strong>\n<ul>\n<li>N\u1ebfu ch\u1ec9 c\u00f3 1 website duy nh\u1ea5t (<code>yourdomain.com<\/code>), b\u1ea1n ch\u1ec9 c\u1ea7n ch\u1ee9ng ch\u1ec9 <strong>Single Domain<\/strong>.<\/li>\n<li>N\u1ebfu b\u1ea1n c\u00f3 nhi\u1ec1u t\u00ean mi\u1ec1n ph\u1ee5 (subdomain) nh\u01b0 <code>blog.yourdomain.com<\/code>, <code>shop.yourdomain.com<\/code>, h\u00e3y ch\u1ecdn <strong>Wildcard SSL<\/strong>.<\/li>\n<li>N\u1ebfu b\u1ea1n qu\u1ea3n l\u00fd nhi\u1ec1u t\u00ean mi\u1ec1n ho\u00e0n to\u00e0n kh\u00e1c nhau (<code>domain1.com<\/code>, <code>domain2.vn<\/code>), h\u00e3y ch\u1ecdn <strong>Multi-Domain SSL (SAN\/UCC)<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<li><strong>L\u1ef1a ch\u1ecdn nh\u00e0 cung c\u1ea5p uy t\u00edn:<\/strong>\n<ul>\n<li>H\u00e3y t\u00ecm \u0111\u1ebfn c\u00e1c nh\u00e0 cung c\u1ea5p <strong>SSL uy t\u00edn<\/strong> c\u00f3 l\u1ecbch s\u1eed l\u00e2u \u0111\u1eddi v\u00e0 \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn r\u1ed9ng r\u00e3i nh\u01b0 DigiCert, Comodo (nay l\u00e0 Sectigo), GeoTrust.<\/li>\n<li>Vi\u1ec7c <strong>mua ch\u1ee9ng ch\u1ec9 s\u1ed1 SSL \u1edf \u0111\u00e2u<\/strong> c\u0169ng r\u1ea5t quan tr\u1ecdng. C\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 <a href=\"https:\/\/interdata.vn\/blog\/hosting-va-ten-mien\/\">hosting v\u00e0 t\u00ean mi\u1ec1n<\/a> l\u1edbn t\u1ea1i Vi\u1ec7t Nam nh\u01b0 <strong>InterData<\/strong> th\u01b0\u1eddng l\u00e0 \u0111\u1ed1i t\u00e1c c\u1ee7a c\u00e1c h\u00e3ng b\u1ea3o m\u1eadt n\u00e0y, cung c\u1ea5p ch\u1ee9ng ch\u1ec9 SSL ch\u00ednh h\u00e3ng v\u1edbi m\u1ee9c gi\u00e1 c\u1ea1nh tranh v\u00e0 \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00f3 \u0111\u1ed9i ng\u0169 h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt b\u1eb1ng ti\u1ebfng Vi\u1ec7t s\u1eb5n s\u00e0ng gi\u00fap b\u1ea1n c\u00e0i \u0111\u1eb7t v\u00e0 x\u1eed l\u00fd s\u1ef1 c\u1ed1.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h2><span class=\"ez-toc-section\" id=\"Cau-hoi-thuong-gap-ve-chung-chi-SSL-FAQ\"><\/span><strong>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 ch\u1ee9ng ch\u1ec9 SSL (FAQ)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 ph\u1ea7n tr\u1ea3 l\u1eddi cho nh\u1eefng c\u00e2u h\u1ecfi ph\u1ed5 bi\u1ebfn nh\u1ea5t m\u00e0 InterData th\u01b0\u1eddng nh\u1eadn \u0111\u01b0\u1ee3c v\u1ec1 ch\u1ee9ng ch\u1ec9 b\u1ea3o m\u1eadt c\u1ee7a trang web:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"SSL-la-gi-va-co-can-thiet-cho-website-khong\"><\/span><strong>SSL l\u00e0 g\u00ec v\u00e0 c\u00f3 c\u1ea7n thi\u1ebft cho website kh\u00f4ng?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>SSL (Secure Sockets Layer) l\u00e0 c\u00f4ng ngh\u1ec7 m\u00e3 h\u00f3a d\u1eef li\u1ec7u gi\u1eefa m\u00e1y ch\u1ee7 v\u00e0 tr\u00ecnh duy\u1ec7t. SSL l\u00e0 C\u1ef0C K\u1ef2 c\u1ea7n thi\u1ebft cho M\u1eccI website hi\u1ec7n nay \u0111\u1ec3 b\u1ea3o m\u1eadt th\u00f4ng tin, t\u0103ng uy t\u00edn, c\u1ea3i thi\u1ec7n SEO v\u00e0 tr\u00e1nh b\u1ecb tr\u00ecnh duy\u1ec7t c\u1ea3nh b\u00e1o &#8220;Kh\u00f4ng b\u1ea3o m\u1eadt&#8221;.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"SSL-mien-phi-co-an-toan-khong\"><\/span><strong>SSL mi\u1ec5n ph\u00ed c\u00f3 an to\u00e0n kh\u00f4ng?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>C\u00f3, SSL mi\u1ec5n ph\u00ed nh\u01b0 Let&#8217;s Encrypt cung c\u1ea5p m\u1ee9c \u0111\u1ed9 m\u00e3 h\u00f3a an to\u00e0n t\u01b0\u01a1ng t\u1ef1 nh\u01b0 SSL tr\u1ea3 ph\u00ed. Tuy nhi\u00ean, ch\u00fang ch\u1ec9 x\u00e1c th\u1ef1c t\u00ean mi\u1ec1n (DV), c\u00f3 th\u1eddi h\u1ea1n ng\u1eafn (90 ng\u00e0y) v\u00e0 kh\u00f4ng \u0111i k\u00e8m h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt hay b\u1ea3o hi\u1ec3m.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Lam-the-nao-de-kiem-tra-mot-website-da-co-SSL-hay-chua\"><\/span><strong>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ki\u1ec3m tra m\u1ed9t website \u0111\u00e3 c\u00f3 SSL hay ch\u01b0a?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>B\u1ea1n c\u00f3 th\u1ec3 ki\u1ec3m tra SSL b\u1eb1ng c\u00e1ch nh\u00ecn v\u00e0o thanh \u0111\u1ecba ch\u1ec9 c\u1ee7a tr\u00ecnh duy\u1ec7t. N\u1ebfu th\u1ea5y bi\u1ec3u t\u01b0\u1ee3ng \u1ed5 kh\u00f3a v\u00e0 \u0111\u1ecba ch\u1ec9 b\u1eaft \u0111\u1ea7u b\u1eb1ng <code>https:\/\/<\/code>, website \u0111\u00f3 \u0111\u00e3 c\u00f3 SSL.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"SSL-co-thoi-han-trong-bao-lau-Tai-sao-phai-gia-han\"><\/span><strong>SSL c\u00f3 th\u1eddi h\u1ea1n trong bao l\u00e2u? T\u1ea1i sao ph\u1ea3i gia h\u1ea1n?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>SSL tr\u1ea3 ph\u00ed th\u01b0\u1eddng c\u00f3 th\u1eddi h\u1ea1n 1 n\u0103m. SSL mi\u1ec5n ph\u00ed c\u00f3 th\u1eddi h\u1ea1n 90 ng\u00e0y. Vi\u1ec7c gia h\u1ea1n l\u00e0 b\u1eaft bu\u1ed9c \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00e1c th\u00f4ng tin x\u00e1c th\u1ef1c lu\u00f4n \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt v\u00e0 duy tr\u00ec c\u00e1c ti\u00eau chu\u1ea9n b\u1ea3o m\u1eadt m\u1edbi nh\u1ea5t.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"EV-SSL-co-can-thiet-khong\"><\/span><strong>EV SSL c\u00f3 c\u1ea7n thi\u1ebft kh\u00f4ng?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>EV SSL<\/strong> l\u00e0 c\u1ea7n thi\u1ebft cho c\u00e1c trang web y\u00eau c\u1ea7u m\u1ee9c \u0111\u1ed9 tin c\u1eady cao nh\u1ea5t, nh\u01b0 c\u00e1c trang th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed l\u1edbn, ng\u00e2n h\u00e0ng, t\u1ed5 ch\u1ee9c t\u00e0i ch\u00ednh. Thanh \u0111\u1ecba ch\u1ec9 m\u00e0u xanh l\u00e1 v\u1edbi t\u00ean c\u00f4ng ty l\u00e0 m\u1ed9t d\u1ea5u hi\u1ec7u b\u1ea3o ch\u1ee9ng m\u1ea1nh m\u1ebd, gi\u00fap t\u0103ng t\u1ef7 l\u1ec7 chuy\u1ec3n \u0111\u1ed5i.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Gia-han-SSL-nhu-the-nao\"><\/span><strong>Gia h\u1ea1n SSL nh\u01b0 th\u1ebf n\u00e0o?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Qu\u00e1 tr\u00ecnh gia h\u1ea1n th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n th\u00f4ng qua trang qu\u1ea3n tr\u1ecb c\u1ee7a nh\u00e0 cung c\u1ea5p n\u01a1i b\u1ea1n \u0111\u00e3 mua SSL. B\u1ea1n s\u1ebd c\u1ea7n th\u1ef1c hi\u1ec7n l\u1ea1i qu\u00e1 tr\u00ecnh x\u00e1c th\u1ef1c v\u00e0 c\u00e0i \u0111\u1eb7t ch\u1ee9ng ch\u1ec9 m\u1edbi.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"HTTPS-co-giup-SEO-khong\"><\/span><strong>HTTPS c\u00f3 gi\u00fap SEO kh\u00f4ng?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>C\u00f3. Google \u0111\u00e3 x\u00e1c nh\u1eadn HTTPS l\u00e0 m\u1ed9t t\u00edn hi\u1ec7u x\u1ebfp h\u1ea1ng. Vi\u1ec7c s\u1eed d\u1ee5ng <strong>HTTPS SEO<\/strong> gi\u00fap website c\u1ee7a b\u1ea1n c\u00f3 l\u1ee3i th\u1ebf c\u1ea1nh tranh nh\u1ecf nh\u01b0ng quan tr\u1ecdng so v\u1edbi c\u00e1c \u0111\u1ed1i th\u1ee7 v\u1eabn c\u00f2n d\u00f9ng HTTP.<\/p>\n<p>Vi\u1ec7c trang b\u1ecb ch\u1ee9ng ch\u1ec9 SSL kh\u00f4ng c\u00f2n l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn n\u00e2ng cao, m\u00e0 \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t ti\u00eau chu\u1ea9n c\u01a1 b\u1ea3n cho b\u1ea5t k\u1ef3 ai mu\u1ed1n v\u1eadn h\u00e0nh m\u1ed9t website chuy\u00ean nghi\u1ec7p v\u00e0 th\u00e0nh c\u00f4ng. N\u1ebfu b\u1ea1n c\u00f2n b\u1ea5t k\u1ef3 th\u1eafc m\u1eafc n\u00e0o, \u0111\u1eebng ng\u1ea7n ng\u1ea1i li\u00ean h\u1ec7 v\u1edbi \u0111\u1ed9i ng\u0169 chuy\u00ean gia c\u1ee7a <strong>InterData<\/strong> \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n gi\u1ea3i ph\u00e1p SSL ph\u00f9 h\u1ee3p nh\u1ea5t.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>T\u00f3m t\u1eaft b\u00e0i vi\u1ebft: Ch\u1ee9ng ch\u1ec9 s\u1ed1 SSL (Secure Sockets Layer) l\u00e0 m\u1ed9t ch\u1ee9ng ch\u1ec9 k\u1ef9 thu\u1eadt s\u1ed1 gi\u00fap x\u00e1c th\u1ef1c danh t\u00ednh website v\u00e0 m\u00e3 h\u00f3a d\u1eef li\u1ec7u truy\u1ec1n gi\u1eefa tr\u00ecnh duy\u1ec7t ng\u01b0\u1eddi d\u00f9ng v\u00e0 m\u00e1y ch\u1ee7 web. N\u00f3 \u0111\u1ea3m b\u1ea3o th\u00f4ng tin nh\u1ea1y c\u1ea3m nh\u01b0 m\u1eadt kh\u1ea9u, th\u1ebb t\u00edn d\u1ee5ng \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7<\/p>\n","protected":false},"author":2,"featured_media":35034,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[83],"tags":[62,61,60],"class_list":["post-16688","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bao-mat-an-ninh-mang","tag-bao-mat","tag-hosting","tag-ssl"],"_links":{"self":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/16688","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/comments?post=16688"}],"version-history":[{"count":13,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/16688\/revisions"}],"predecessor-version":[{"id":39597,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/16688\/revisions\/39597"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media\/35034"}],"wp:attachment":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media?parent=16688"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/categories?post=16688"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/tags?post=16688"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}