{"id":12366235,"date":"2026-03-13T18:23:23","date_gmt":"2026-03-13T10:23:23","guid":{"rendered":"https:\/\/www.likacloud.com\/knowledge\/%e4%b8%80%e6%96%87%e8%af%bb%e6%87%82ssl%e8%af%81%e4%b9%a6%ef%bc%9a%e7%b1%bb%e5%9e%8b%e3%80%81%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86%e4%b8%8e%e5%ae%89%e8%a3%85%e9%85%8d%e7%bd%ae%e5%85%a8%e6%8c%87\/"},"modified":"2026-03-13T18:38:06","modified_gmt":"2026-03-13T10:38:06","slug":"ssl-certificate-types-how-it-works-installation-configuration-guide","status":"publish","type":"knowledge_post","link":"https:\/\/www.likacloud.com\/vi\/knowledge\/ssl-certificate\/ssl-certificate-types-how-it-works-installation-configuration-guide\/","title":{"rendered":"T\u00ecm hi\u1ec3u \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 ch\u1ee9ng ch\u1ec9 SSL: Lo\u1ea1i h\u00ecnh, c\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng v\u00e0 h\u01b0\u1edbng d\u1eabn c\u00e0i \u0111\u1eb7t"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Trong th\u1ebf gi\u1edbi m\u1ea1ng, vi\u1ec7c truy\u1ec1n t\u1ea3i d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch an to\u00e0n gi\u1ed1ng nh\u01b0 vi\u1ec7c l\u1eafp \u0111\u1eb7t m\u1ed9t \u1ed5 kh\u00f3a b\u1ea5t kh\u1ea3 x\u00e2m ph\u1ea1m cho c\u00e1c \u0111\u01b0\u1eddng truy\u1ec1n th\u00f4ng tin. Ch\u1ee9ng ch\u1ec9 SSL ch\u00ednh l\u00e0 tr\u00e1i tim c\u1ee7a \u1ed5 kh\u00f3a \u0111\u00f3; n\u00f3 kh\u00f4ng ch\u1ec9 l\u00e0 bi\u1ec3u t\u01b0\u1ee3ng d\u1ea1ng kh\u00f3a m\u00e0u xanh l\u00e1 c\u00e2y xu\u1ea5t hi\u1ec7n trong thanh \u0111\u1ecba ch\u1ec9 trang web, m\u00e0 c\u00f2n l\u00e0 n\u1ec1n t\u1ea3ng k\u1ef9 thu\u1eadt quan tr\u1ecdng \u0111\u1ec3 x\u00e2y d\u1ef1ng l\u00f2ng tin tr\u00ean m\u1ea1ng, b\u1ea3o v\u1ec7 quy\u1ec1n ri\u00eang t\u01b0 c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a d\u1eef li\u1ec7u. Vi\u1ec7c hi\u1ec3u r\u00f5 v\u1ec1 ch\u1ee9ng ch\u1ec9 SSL l\u00e0 \u0111i\u1ec1u c\u1ef1c k\u1ef3 c\u1ea7n thi\u1ebft \u0111\u1ed1i v\u1edbi m\u1ecdi ch\u1ee7 s\u1edf h\u1eefu trang web, nh\u00e0 ph\u00e1t tri\u1ec3n v\u00e0 chuy\u00ean gia b\u1ea3o m\u1eadt.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e1c kh\u00e1i ni\u1ec7m c\u1ed1t l\u00f5i v\u00e0 ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a ch\u1ee9ng ch\u1ec9 SSL<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">SSL (Secure Sockets Layer) v\u00e0 ng\u01b0\u1eddi k\u1ebf nhi\u1ec7m c\u1ee7a n\u00f3 l\u00e0 TLS (Transport Layer Security) l\u00e0 c\u00e1c giao th\u1ee9c an ninh ti\u00eau chu\u1ea9n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 thi\u1ebft l\u1eadp c\u00e1c k\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a. Ch\u1ee9ng ch\u1ec9 SSL ch\u00ednh l\u00e0 nh\u1eefng t\u1ec7p tin k\u1ef9 thu\u1eadt s\u1ed1 gi\u00fap th\u1ef1c hi\u1ec7n c\u00e1c giao th\u1ee9c n\u00e0y; ch\u00fang \u0111\u00f3ng vai tr\u00f2 nh\u01b0 \u201ch\u1ed9 chi\u1ebfu k\u1ef9 thu\u1eadt s\u1ed1\u201d trong qu\u00e1 tr\u00ecnh truy\u1ec1n th\u00f4ng tr\u00ean m\u1ea1ng, \u0111\u1ea3m b\u1ea3o r\u1eb1ng th\u00f4ng tin \u0111\u01b0\u1ee3c trao \u0111\u1ed5i gi\u1eefa m\u00e1y ch\u1ee7 (trang web) v\u00e0 m\u00e1y kh\u00e1ch (tr\u00ecnh duy\u1ec7t) l\u00e0 an to\u00e0n v\u00e0 \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">X\u00e1c th\u1ef1c v\u00e0 thi\u1ebft l\u1eadp ni\u1ec1m tin<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a ch\u1ee9ng ch\u1ec9 SSL l\u00e0 x\u00e1c th\u1ef1c danh t\u00ednh c\u1ee7a m\u00e1y ch\u1ee7. Ch\u1ee9ng ch\u1ec9 n\u00e0y \u0111\u01b0\u1ee3c c\u1ea5p b\u1edfi m\u1ed9t t\u1ed5 ch\u1ee9c th\u1ee9 ba \u0111\u00e1ng tin c\u1eady \u2013 t\u1ed5 ch\u1ee9c c\u1ea5p ch\u1ee9ng ch\u1ec9 (Certificate Authority \u2013 CA), v\u00e0 bao g\u1ed3m th\u00f4ng tin v\u1ec1 ch\u1ee7 s\u1edf h\u1eefu trang web, t\u00ean mi\u1ec1n, th\u1eddi h\u1ea1n hi\u1ec7u l\u1ef1c c\u1ee7a ch\u1ee9ng ch\u1ec9, c\u00f9ng v\u1edbi ch\u1eef k\u00fd s\u1ed1 c\u1ee7a t\u1ed5 ch\u1ee9c \u0111\u00f3. Khi ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp m\u1ed9t trang web \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t ch\u1ee9ng ch\u1ec9 SSL h\u1ee3p l\u1ec7, tr\u00ecnh duy\u1ec7t s\u1ebd ki\u1ec3m tra t\u00ednh x\u00e1c th\u1ef1c c\u1ee7a ch\u1ee9ng ch\u1ec9 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng h\u1ecd \u0111ang truy c\u1eadp \u0111\u00fang trang web m\u00e0 h\u1ecd mong mu\u1ed1n, ch\u1ee9 kh\u00f4ng ph\u1ea3i m\u1ed9t trang web gi\u1ea3 m\u1ea1o. \u0110i\u1ec1u n\u00e0y cung c\u1ea5p s\u1ef1 b\u1ea3o \u0111\u1ea3m v\u1ec1 t\u00ednh tin c\u1eady cho ng\u01b0\u1eddi truy c\u1eadp, v\u00e0 l\u00e0 y\u1ebfu t\u1ed1 kh\u00f4ng th\u1ec3 thi\u1ebfu trong c\u00e1c ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed, ng\u00e2n h\u00e0ng tr\u1ef1c tuy\u1ebfn, v.v.<\/p>\n<!-- AUTO_INTERNAL_LINKS_START --><p>\u0110\u1ecdc th\u00eam <a href=\"https:\/\/www.likacloud.com\/ar\/knowledge\/ssl-certificate\/ssl-certificate-explained-principles-types-applications\/\">SSL ch\u1ee9ng ch\u1ec9 l\u00e0 g\u00ec? Ph\u00e2n t\u00edch to\u00e0n di\u1ec7n v\u1ec1 nguy\u00ean l\u00fd, lo\u1ea1i h\u00ecnh v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a n\u00f3<\/a>\u3002<\/p><!-- AUTO_INTERNAL_LINKS_END -->\n\n\n\n\n<h3 class=\"wp-block-heading\">M\u00e3 h\u00f3a d\u1eef li\u1ec7u v\u00e0 b\u1ea3o v\u1ec7 quy\u1ec1n ri\u00eang t\u01b0<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t ch\u1ee9c n\u0103ng c\u1ed1t l\u00f5i kh\u00e1c c\u1ee7a ch\u1ee9ng ch\u1ec9 SSL l\u00e0 th\u1ef1c hi\u1ec7n vi\u1ec7c m\u00e3 h\u00f3a d\u1eef li\u1ec7u. Ch\u1ee9ng ch\u1ec9 n\u00e0y s\u1eed d\u1ee5ng k\u1ebft h\u1ee3p gi\u1eefa c\u00e1c ph\u01b0\u01a1ng ph\u00e1p m\u00e3 h\u00f3a b\u1ea5t \u0111\u1ed1i x\u1ee9ng v\u00e0 m\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng \u0111\u1ec3 th\u1ecfa thu\u1eadn v\u00e0 t\u1ea1o ra m\u1ed9t kh\u00f3a phi\u00ean duy nh\u1ea5t gi\u1eefa m\u00e1y kh\u00e1ch v\u00e0 m\u00e1y ch\u1ee7. T\u1ea5t c\u1ea3 d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n t\u1ea3i gi\u1eefa hai b\u00ean (ch\u1eb3ng h\u1ea1n nh\u01b0 th\u00f4ng tin \u0111\u0103ng nh\u1eadp, s\u1ed1 th\u1ebb t\u00edn d\u1ee5ng, th\u00f4ng tin c\u00e1 nh\u00e2n, l\u1ecbch s\u1eed tr\u00f2 chuy\u1ec7n) \u0111\u1ec1u s\u1ebd \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a b\u1eb1ng kh\u00f3a n\u00e0y. Ngay c\u1ea3 khi d\u1eef li\u1ec7u b\u1ecb \u0111\u00e1nh c\u1eafp trong qu\u00e1 tr\u00ecnh truy\u1ec1n, k\u1ebb t\u1ea5n c\u00f4ng c\u0169ng ch\u1ec9 nh\u1eadn \u0111\u01b0\u1ee3c nh\u1eefng d\u1eef li\u1ec7u d\u1ea1ng m\u00e3 m\u00e0 kh\u00f4ng th\u1ec3 gi\u1ea3i m\u00e3 \u0111\u01b0\u1ee3c, t\u1eeb \u0111\u00f3 \u0111\u1ea3m b\u1ea3o t\u00ednh b\u1ea3o m\u1eadt c\u1ee7a th\u00f4ng tin.<\/p>\n<!-- AUTO_SYNCED_PATTERN_INSERT_START -->\n<div class=\"grid grid-cols-1 md:grid-cols-2 gap-4 md:gap-6 mb-8 md:mb-10 mt-10\"> \r\n\t<!-- \u91cd\u590d\u5668\u5faa\u73af\u5f00\u59cb -->\r\n\t\t\r\n\t<!-- \u5546\u5bb6\u5361\u7247 -->\r\n\t<div class=\"bg-white dark:bg-gray-750 rounded-lg overflow-hidden shadow-md flex gap-1 flex-col     justify-between\" data-link=\"https:\/\/www.likacloud.com\/vi\/tolink\/bluehost-ssl-certificates\/\">\r\n\t\t<div class=\"flex items-start justify-between\"> \r\n\t\t\t<!-- \u5546\u5bb6logo -->\r\n\t\t\t<div class=\"w-16 h-16 bg-blue-200 dark:bg-blue-500\/30 flex items-center justify-center flex-shrink-0 p-3\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.likacloud.com\/wp-content\/uploads\/2025\/12\/20251231095917.webp\" alt=\"Ch\u1ee9ng ch\u1ec9 SSL Bluehost\" class=\"w-12 object-contain !dark-filter08\" title=\"\">\r\n\t\t\t\t\t\t\t\t\t\r\n\t\t\t<\/div>\r\n\t\t\t\r\n\t\t\t<!-- \u5546\u5bb6\u4fe1\u606f -->\r\n\t\t\t<div class=\"px-4 pt-2 flex-grow\">\r\n\t\t\t\t<div class=\"flex justify-between items-start mb-2\">\r\n\t\t\t\t\t<strong class=\"text-xl font-bold\">Ch\u1ee9ng ch\u1ec9 SSL Bluehost<\/strong>\r\n\t\t\t\t\t\t\t\t\t<\/div>\r\n\t\t\t<\/div>\r\n\t\t<\/div>\r\n\t\t\t\t<span class=\"text-gray-500 dark:text-gray-300 !text-sm p-4 pb-0\">BlueHost SSL cung c\u1ea5p t\u00f9y ch\u1ecdn gia h\u1ea1n t\u1eeb 1-2 n\u0103m, h\u1ed7 tr\u1ee3 thu\u1eadt to\u00e1n RSA ho\u1eb7c ECC, \u0111\u1ed9 d\u00e0i kh\u00f3a l\u00ean \u0111\u1ebfn 4096 bit v\u00e0 b\u1ea3o hi\u1ec3m l\u00ean \u0111\u1ebfn 1,75 tri\u1ec7u USD.<\/span>\r\n\t\t\t\t<div class=\"flex flex-col gap-4 md:gap-6 justify-between p-4\"> \r\n\t\t\t<!-- \u6807\u7b7e -->\r\n\t\t\t\t\t\t\r\n\t\t\t<!-- \u6d3b\u52a8\u548c\u94fe\u63a5 --> \r\n\t\t\t<div class=\"flex justify-between items-center gap-3 flex-col\">\r\n\t\t\t\t\t\t\t\t<div class=\"text-gray-500 dark:text-gray-300 !text-sm line-clamp-1\">T\u1eeb 7,49 USD m\u1ed7i th\u00e1ng<\/div>\r\n\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.likacloud.com\/vi\/tolink\/bluehost-ssl-certificates\/\" class=\"flex justify-end font-bold !text-lg !text-blue-600 dark:!text-blue-500\">Truy c\u1eadp ch\u1ee9ng ch\u1ec9 SSL Bluehost \u2192<\/a>\r\n\t\t\t\t\t\t\t<\/div> \r\n\t\t<\/div>\r\n\t<\/div>\r\n\t\t\r\n\t<!-- \u5546\u5bb6\u5361\u7247 -->\r\n\t<div class=\"bg-white dark:bg-gray-750 rounded-lg overflow-hidden shadow-md flex gap-1 flex-col     justify-between\" data-link=\"https:\/\/www.likacloud.com\/vi\/tolink\/hosting-com-ssl-certificates\/\">\r\n\t\t<div class=\"flex items-start justify-between\"> \r\n\t\t\t<!-- \u5546\u5bb6logo -->\r\n\t\t\t<div class=\"w-16 h-16 bg-blue-200 dark:bg-blue-500\/30 flex items-center justify-center flex-shrink-0 p-3\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.likacloud.com\/wp-content\/uploads\/2025\/12\/20251227070008.webp\" alt=\"Ch\u1ee9ng ch\u1ec9 SSL hosting.com\" class=\"w-12 object-contain !dark-filter08\" title=\"\">\r\n\t\t\t\t\t\t\t\t\t\r\n\t\t\t<\/div>\r\n\t\t\t\r\n\t\t\t<!-- \u5546\u5bb6\u4fe1\u606f -->\r\n\t\t\t<div class=\"px-4 pt-2 flex-grow\">\r\n\t\t\t\t<div class=\"flex justify-between items-start mb-2\">\r\n\t\t\t\t\t<strong class=\"text-xl font-bold\">Ch\u1ee9ng ch\u1ec9 SSL hosting.com<\/strong>\r\n\t\t\t\t\t\t\t\t\t<\/div>\r\n\t\t\t<\/div>\r\n\t\t<\/div>\r\n\t\t\t\t<span class=\"text-gray-500 dark:text-gray-300 !text-sm p-4 pb-0\">Ch\u1ee9ng ch\u1ec9 SSL DV, OV, EV gi\u00e1 c\u1ea3 ph\u1ea3i ch\u0103ng, m\u00e3 h\u00f3a l\u00ean \u0111\u1ebfn 256 bit, s\u1ed1 ti\u1ec1n b\u1ea3o \u0111\u1ea3m t\u1eeb 5 ~ 100 tri\u1ec7u USD, h\u1ed7 tr\u1ee3 24\/7<\/span>\r\n\t\t\t\t<div class=\"flex flex-col gap-4 md:gap-6 justify-between p-4\"> \r\n\t\t\t<!-- \u6807\u7b7e -->\r\n\t\t\t\t\t\t\r\n\t\t\t<!-- \u6d3b\u52a8\u548c\u94fe\u63a5 --> \r\n\t\t\t<div class=\"flex justify-between items-center gap-3 flex-col\">\r\n\t\t\t\t\t\t\t\t<div class=\"text-gray-500 dark:text-gray-300 !text-sm line-clamp-1\">B\u1eaft \u0111\u1ea7u t\u1eeb $2.5 USD m\u1ed7i th\u00e1ng<\/div>\r\n\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.likacloud.com\/vi\/tolink\/hosting-com-ssl-certificates\/\" class=\"flex justify-end font-bold !text-lg !text-blue-600 dark:!text-blue-500\">Truy c\u1eadp hosting.com Ch\u1ee9ng ch\u1ec9 SSL \u2192<\/a>\r\n\t\t\t\t\t\t\t<\/div> \r\n\t\t<\/div>\r\n\t<\/div>\r\n\t\t<!-- \u91cd\u590d\u5668\u5faa\u73af\u7ed3\u675f -->\r\n<\/div>\r\n\r\n\r\n\n<!-- AUTO_SYNCED_PATTERN_INSERT_END -->\n\n\n\n\n\n<h3 class=\"wp-block-heading\">B\u1ea3o \u0111\u1ea3m t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ngo\u00e0i vi\u1ec7c m\u00e3 h\u00f3a, giao th\u1ee9c SSL\/TLS c\u00f2n \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a d\u1eef li\u1ec7u th\u00f4ng qua m\u00e3 x\u00e1c th\u1ef1c th\u00f4ng \u0111i\u1ec7p (Message Authentication Code \u2013 MAC). \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 n\u1ebfu d\u1eef li\u1ec7u b\u1ecb s\u1eeda \u0111\u1ed5i trong qu\u00e1 tr\u00ecnh truy\u1ec1n t\u1ea3i, b\u00ean nh\u1eadn s\u1ebd ngay l\u1eadp t\u1ee9c ph\u00e1t hi\u1ec7n ra \u0111i\u1ec1u \u0111\u00f3, t\u1eeb \u0111\u00f3 ng\u0103n ch\u1eb7n \u0111\u01b0\u1ee3c c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng c\u1ee7a k\u1ebb trung gian nh\u1eb1m thay \u0111\u1ed5i d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch c\u00f3 ch\u1ee7 \u0111\u00edch.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e1c lo\u1ea1i ch\u1ee9ng ch\u1ec9 SSL ch\u00ednh v\u00e0 c\u00e1ch l\u1ef1a ch\u1ecdn<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">D\u1ef1a tr\u00ean m\u1ee9c \u0111\u1ed9 x\u00e1c th\u1ef1c v\u00e0 ph\u1ea1m vi ch\u1ee9c n\u0103ng \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7, ch\u1ee9ng ch\u1ec9 SSL \u0111\u01b0\u1ee3c chia th\u00e0nh c\u00e1c lo\u1ea1i sau, ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c sc\u00e9nario kinh doanh v\u00e0 y\u00eau c\u1ea7u b\u1ea3o m\u1eadt kh\u00e1c nhau.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ch\u1ee9ng ch\u1ec9 x\u00e1c th\u1ef1c t\u00ean mi\u1ec1n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">DV (Domain Validation) ch\u1ee9ng ch\u1ec9 l\u00e0 lo\u1ea1i ch\u1ee9ng ch\u1ec9 SSL c\u01a1 b\u1ea3n nh\u1ea5t v\u00e0 \u0111\u01b0\u1ee3c c\u1ea5p ph\u00e1t nhanh nh\u1ea5t. C\u01a1 quan c\u1ea5p ch\u1ee9ng ch\u1ec9 (CA \u2013 Certificate Authority) ch\u1ec9 x\u00e1c minh quy\u1ec1n s\u1edf h\u1eefu t\u00ean mi\u1ec1n c\u1ee7a ng\u01b0\u1eddi n\u1ed9p \u0111\u01a1n (th\u01b0\u1eddng th\u00f4ng qua email ho\u1eb7c b\u1ea3n ghi DNS), ch\u1ee9 kh\u00f4ng x\u00e1c minh danh t\u00ednh th\u1ef1c s\u1ef1 c\u1ee7a doanh nghi\u1ec7p ho\u1eb7c t\u1ed5 ch\u1ee9c \u0111\u00f3. Do \u0111\u00f3, th\u00f4ng tin trong ch\u1ee9ng ch\u1ec9 ch\u1ec9 bao g\u1ed3m t\u00ean mi\u1ec1n m\u00e0 th\u00f4i.<br \/>\nLo\u1ea1i ch\u1ee9ng ch\u1ec9 n\u00e0y c\u00f3 gi\u00e1 r\u1ebb ho\u1eb7c th\u1eadm ch\u00ed mi\u1ec5n ph\u00ed, ph\u00f9 h\u1ee3p cho blog c\u00e1 nh\u00e2n, trang web nh\u1ecf ho\u1eb7c m\u00f4i tr\u01b0\u1eddng th\u1eed nghi\u1ec7m. N\u00f3 cung c\u1ea5p c\u00e1c ch\u1ee9c n\u0103ng m\u00e3 h\u00f3a c\u01a1 b\u1ea3n, nh\u01b0ng kh\u00f4ng th\u1ec3 hi\u1ec3n th\u1ecb th\u00f4ng tin chi ti\u1ebft v\u1ec1 doanh nghi\u1ec7p \u0111\u1ec3 x\u00e2y d\u1ef1ng l\u00f2ng tin s\u00e2u r\u1ed9ng t\u1eeb ph\u00eda ng\u01b0\u1eddi d\u00f9ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ch\u1ee9ng ch\u1ec9 x\u00e1c th\u1ef1c t\u1ed5 ch\u1ee9c<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c x\u00e1c th\u1ef1c c\u00e1c ch\u1ee9ng ch\u1ec9 OV (Organic Verification) di\u1ec5n ra m\u1ed9t c\u00e1ch nghi\u00eam ng\u1eb7t h\u01a1n. C\u01a1 quan c\u1ea5p ch\u1ee9ng ch\u1ec9 (CA \u2013 Certificate Authority) kh\u00f4ng ch\u1ec9 ki\u1ec3m tra quy\u1ec1n s\u1edf h\u1eefu t\u00ean mi\u1ec1n m\u00e0 c\u00f2n x\u00e1c minh t\u00ednh ch\u00ednh th\u1ee9c c\u1ee7a doanh nghi\u1ec7p n\u1ed9p \u0111\u01a1n, bao g\u1ed3m t\u00ean c\u00f4ng ty, \u0111\u1ecba ch\u1ec9, s\u1ed1 \u0111i\u1ec7n tho\u1ea1i v\u00e0 c\u00e1c th\u00f4ng tin kh\u00e1c. Nh\u1eefng th\u00f4ng tin n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c ghi trong chi ti\u1ebft c\u1ee7a ch\u1ee9ng ch\u1ec9 \u0111\u1ec3 ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 ki\u1ec3m tra.<br \/>\nCh\u1ee9ng ch\u1ec9 OV (Organizational Validation) gi\u00fap n\u00e2ng cao \u0111\u00e1ng k\u1ec3 m\u1ee9c \u0111\u1ed9 tin c\u1eady c\u1ee7a trang web, ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c trang web ch\u00ednh th\u1ee9c c\u1ee7a doanh nghi\u1ec7p, c\u00e1c trang web th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed th\u00f4ng th\u01b0\u1eddng, c\u0169ng nh\u01b0 c\u00e1c d\u1ecbch v\u1ee5 tr\u1ef1c tuy\u1ebfn c\u1ea7n ch\u1ee9ng minh danh t\u00ednh c\u1ee7a t\u1ed5 ch\u1ee9c h\u1ee3p ph\u00e1p.<\/p>\n<!-- AUTO_INTERNAL_LINKS_START --><p>\u0110\u1ecdc th\u00eam <a href=\"https:\/\/www.likacloud.com\/ar\/knowledge\/ssl-certificate\/ssl-certificate-guide-principles-installation-website-security-trust\/\">Ph\u00e2n t\u00edch to\u00e0n di\u1ec7n v\u1ec1 ch\u1ee9ng ch\u1ec9 SSL: T\u1eeb nguy\u00ean l\u00fd \u0111\u1ebfn c\u00e1ch c\u00e0i \u0111\u1eb7t, gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 b\u1ea3o m\u1eadt v\u00e0 uy t\u00edn cho trang web c\u1ee7a b\u1ea1n ch\u1ec9 trong 10 ph\u00fat<\/a>\u3002<\/p><!-- AUTO_INTERNAL_LINKS_END -->\n\n\n\n\n<h3 class=\"wp-block-heading\">Ch\u1ee9ng ch\u1ec9 x\u00e1c th\u1ef1c m\u1edf r\u1ed9ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ee9ng ch\u1ec9 EV (Extended Validation) cung c\u1ea5p m\u1ee9c \u0111\u1ed9 x\u00e1c th\u1ef1c v\u00e0 \u0111\u1ed9 tin c\u1eady cao nh\u1ea5t. C\u00e1c t\u1ed5 ch\u1ee9c c\u1ea5p ch\u1ee9ng ch\u1ec9 (CA \u2013 Certificate Authorities) th\u1ef1c hi\u1ec7n quy tr\u00ecnh ki\u1ec3m tra nghi\u00eam ng\u1eb7t nh\u1ea5t, tu\u00e2n theo c\u00e1c ti\u00eau chu\u1ea9n to\u00e0n c\u1ea7u th\u1ed1ng nh\u1ea5t, v\u00e0 ki\u1ec3m tra k\u1ef9 l\u01b0\u1ee1ng v\u1ec1 s\u1ef1 t\u1ed3n t\u1ea1i ph\u00e1p l\u00fd v\u00e0 v\u1eadt l\u00fd c\u1ee7a doanh nghi\u1ec7p. Nh\u1eefng trang web s\u1eed d\u1ee5ng ch\u1ee9ng ch\u1ec9 EV s\u1ebd hi\u1ec3n th\u1ecb t\u00ean c\u00f4ng ty m\u00e0u xanh l\u00e1 c\u00e2y tr\u1ef1c ti\u1ebfp trong thanh \u0111\u1ecba ch\u1ec9 c\u1ee7a h\u1ea7u h\u1ebft c\u00e1c tr\u00ecnh duy\u1ec7t ph\u1ed5 bi\u1ebfn, thay v\u00ec ch\u1ec9 c\u00f3 bi\u1ec3u t\u01b0\u1ee3ng kh\u00f3a an to\u00e0n.<br \/>\nLo\u1ea1i ch\u1ee9ng ch\u1ec9 n\u00e0y l\u00e0 l\u1ef1a ch\u1ecdn h\u00e0ng \u0111\u1ea7u cho c\u00e1c t\u1ed5 ch\u1ee9c c\u00f3 y\u00eau c\u1ea7u cao v\u1ec1 an ninh v\u00e0 s\u1ef1 tin c\u1eady, nh\u01b0 c\u00e1c t\u1ed5 ch\u1ee9c t\u00e0i ch\u00ednh, n\u1ec1n t\u1ea3ng th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed l\u1edbn, c\u01a1 quan ch\u00ednh ph\u1ee7, v.v. N\u00f3 gi\u00fap gi\u1ea3m thi\u1ec3u \u0111\u00e1ng k\u1ec3 m\u1ed1i lo ng\u1ea1i c\u1ee7a ng\u01b0\u1eddi d\u00f9ng \u0111\u1ed1i v\u1edbi c\u00e1c trang web l\u1eeba \u0111\u1ea3o.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ph\u00e2n lo\u1ea1i theo ph\u1ea1m vi ch\u1ee9c n\u0103ng: Ch\u1ee9ng ch\u1ec9 cho m\u1ed9t t\u00ean mi\u1ec1n, ch\u1ee9ng ch\u1ec9 cho nhi\u1ec1u t\u00ean mi\u1ec1n v\u00e0 ch\u1ee9ng ch\u1ec9 d\u00f9ng k\u00fd t\u1ef1 \u0111\u1ea1i di\u1ec7n (%).<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ngo\u00e0i m\u1ee9c \u0111\u1ed9 x\u00e1c th\u1ef1c, ch\u1ee9ng ch\u1ec9 c\u00f2n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i theo s\u1ed1 l\u01b0\u1ee3ng t\u00ean mi\u1ec1n m\u00e0 ch\u00fang b\u1ea3o v\u1ec7. Ch\u1ee9ng ch\u1ec9 cho m\u1ed9t t\u00ean mi\u1ec1n duy nh\u1ea5t ch\u1ec9 b\u1ea3o v\u1ec7 m\u1ed9t t\u00ean mi\u1ec1n c\u1ee5 th\u1ec3 (v\u00ed d\u1ee5: www.example.com). Ch\u1ee9ng ch\u1ec9 cho nhi\u1ec1u t\u00ean mi\u1ec1n cho ph\u00e9p b\u1ea3o v\u1ec7 nhi\u1ec1u t\u00ean mi\u1ec1n kh\u00f4ng li\u00ean quan \u0111\u1ebfn nhau trong c\u00f9ng m\u1ed9t ch\u1ee9ng ch\u1ec9. Ch\u1ee9ng ch\u1ec9 ch\u1ee9a k\u00fd t\u1ef1 \u0111\u1ea1i di\u1ec7n (wildcard) c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 m\u1ed9t t\u00ean mi\u1ec1n ch\u00ednh v\u00e0 t\u1ea5t c\u1ea3 c\u00e1c t\u00ean mi\u1ec1n con c\u00f9ng c\u1ea5p \u0111\u1ed9 v\u1edbi n\u00f3 (v\u00ed d\u1ee5: *.example.com), r\u1ea5t ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c doanh nghi\u1ec7p c\u00f3 nhi\u1ec1u trang web con, gi\u00fap vi\u1ec7c qu\u1ea3n l\u00fd tr\u1edf n\u00ean d\u1ec5 d\u00e0ng v\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng v\u00e0 qu\u00e1 tr\u00ecnh thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i (handshake) c\u1ee7a giao th\u1ee9c SSL\/TLS<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ch\u1ee9ng ch\u1ec9 SSL d\u1ef1a tr\u00ean giao th\u1ee9c SSL\/TLS, v\u00e0 qu\u00e1 tr\u00ecnh c\u1ed1t l\u00f5i \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201cqu\u00e1 tr\u00ecnh giao ti\u1ebfp SSL\u201d (SSL handshake). \u0110\u00e2y l\u00e0 m\u1ed9t lo\u1ea1t c\u00e1c thao t\u00e1c trao \u0111\u1ed5i th\u00f4ng \u0111i\u1ec7p ph\u1ee9c t\u1ea1p nh\u01b0ng hi\u1ec7u qu\u1ea3 di\u1ec5n ra tr\u01b0\u1edbc khi kh\u00e1ch h\u00e0ng v\u00e0 m\u00e1y ch\u1ee7 thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i m\u00e3 h\u00f3a ch\u00ednh th\u1ee9c v\u1edbi nhau.<\/p>\n<!-- AUTO_SYNCED_PATTERN_INSERT_START -->\n\n  <div class=\"flex justify-between items-center flex-col lg:flex-row xl:flex-col 2xl:flex-row gap-6 sm:gap-8 rounded-lg border border-gray-200 dark:border-gray-700 p-4 mb-8 lg:mb-10 sm:p-6 bg-white dark:bg-gray-750 shadow-md transition-colors duration-300\"\n         data-link=\"https:\/\/www.likacloud.com\/vi\/tolink\/ultahost-ssl-certificates\/\">\n\n      <div class=\"flex flex-col gap-3 gap-4 sm:gap-6 w-full\">\n        <strong class=\"text-2xl font-semibold text-gray-900 dark:text-gray-200\">Ch\u1ee9ng ch\u1ec9 SSL c\u1ee7a UltaHost<\/strong>\n        <div class=\"text-gray-600 dark:text-gray-300 word-word\">Ch\u1ee9ng ch\u1ec9 DV, EV, OV, h\u1ed7 tr\u1ee3 m\u1ee9c b\u1ea3o hi\u1ec3m t\u1ed1i \u0111a $1,750,000 USD, h\u1ed7 tr\u1ee3 v\u00f4 s\u1ed1 t\u00ean mi\u1ec1n ph\u1ee5, h\u1ed7 tr\u1ee3 c\u00e1c \u1ee9ng d\u1ee5ng iOS v\u00e0 Android, \u01b0u \u0111\u00e3i gi\u00e1 t\u1eeb 20% m\u1ed7i th\u00e1ng, v\u1edbi m\u1ee9c ph\u00ed $15,95 USD, b\u1ea3o l\u00e3nh ho\u00e0n ti\u1ec1n trong v\u00f2ng 30 ng\u00e0y.<\/div>\n      <\/div>\n\n      <div class=\"flex items-center flex-col md:flex-row lg:flex-col xl:flex-row 2xl:flex-col gap-6 shrink-0\">\n                  <a href=\"https:\/\/www.likacloud.com\/vi\/tolink\/ultahost-ssl-certificates\/\">\n                          <!-- \u767d\u5929 -->\n              <img decoding=\"async\" src=\"https:\/\/www.likacloud.com\/wp-content\/uploads\/2025\/12\/20251227020448.webp\" alt=\"Logo ch\u1ee9ng ch\u1ec9 SSL\" class=\"content-promotion-card-icon h-9 min-h-9 dark:hidden\" title=\"\">\n              <!-- \u591c\u95f4 -->\n              <img decoding=\"async\" src=\"https:\/\/www.likacloud.com\/wp-content\/uploads\/2025\/12\/20251229052118.webp\" alt=\"Logo ch\u1ee9ng ch\u1ec9 SSL\" class=\"content-promotion-card-icon h-9 min-h-9 hidden dark:block\" title=\"\">\n                      <\/a>\n          \n        <a href=\"https:\/\/www.likacloud.com\/vi\/tolink\/ultahost-ssl-certificates\/\"\n           class=\"bg-blue-500 w-full md:w-auto lg:w-full xl:w-auto 2xl:w-full text-center !text-white dark:!text-gray-200 !px-5 !py-1.5 rounded-full hover:bg-blue-600 transition-colors\">\n          Truy c\u1eadp UltaHost        <\/a>\n      <\/div>\n    <\/div>\n\n    \n<!-- AUTO_SYNCED_PATTERN_INSERT_END -->\n\n\n\n\n\n<h3 class=\"wp-block-heading\">Gi\u1ea3i th\u00edch chi ti\u1ebft qu\u00e1 tr\u00ecnh b\u1eaft tay<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">1. L\u1eddi ch\u00e0o t\u1eeb ph\u00eda m\u00e1y kh\u00e1ch: M\u00e1y kh\u00e1ch (tr\u00ecnh duy\u1ec7t) g\u1eedi \u0111\u1ebfn m\u00e1y ch\u1ee7 m\u1ed9t th\u00f4ng \u0111i\u1ec7p \u201cClientHello\u201d, trong \u0111\u00f3 bao g\u1ed3m phi\u00ean b\u1ea3n TLS m\u00e0 m\u00e1y kh\u00e1ch h\u1ed7 tr\u1ee3, danh s\u00e1ch c\u00e1c b\u1ed9 m\u00e3 h\u00f3a \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3, v\u00e0 m\u1ed9t s\u1ed1 ng\u1eabu nhi\u00ean.<br \/>\n2. L\u1eddi ch\u00e0o t\u1eeb m\u00e1y ch\u1ee7 v\u00e0 ch\u1ee9ng ch\u1ec9: M\u00e1y ch\u1ee7 tr\u1ea3 l\u1eddi b\u1eb1ng th\u00f4ng b\u00e1o \u201cServerHello\u201d, ch\u1ecdn phi\u00ean b\u1ea3n TLS v\u00e0 b\u1ed9 c\u00f4ng c\u1ee5 m\u00e3 h\u00f3a m\u00e0 c\u1ea3 hai b\u00ean \u0111\u1ec1u h\u1ed7 tr\u1ee3, sau \u0111\u00f3 g\u1eedi ra s\u1ed1 ng\u1eabu nhi\u00ean c\u1ee7a m\u00ecnh. Ti\u1ebfp theo, m\u00e1y ch\u1ee7 s\u1ebd g\u1eedi ch\u1ee9ng ch\u1ec9 SSL c\u1ee7a m\u00ecnh (bao g\u1ed3m kh\u00f3a c\u00f4ng khai) \u0111\u1ebfn m\u00e1y kh\u00e1ch.<br \/>\n3. X\u00e1c th\u1ef1c ch\u1ee9ng ch\u1ec9 v\u00e0 trao \u0111\u1ed5i kh\u00f3a: Sau khi nh\u1eadn \u0111\u01b0\u1ee3c ch\u1ee9ng ch\u1ec9, ph\u00eda kh\u00e1ch h\u00e0ng s\u1ebd s\u1eed d\u1ee5ng th\u01b0 vi\u1ec7n ch\u1ee9ng ch\u1ec9 g\u1ed1c CA (Certificate Authority) \u0111\u01b0\u1ee3c tin c\u1eady c\u00f3 s\u1eb5n trong h\u1ec7 th\u1ed1ng c\u1ee7a m\u00ecnh \u0111\u1ec3 x\u00e1c minh t\u00ednh x\u00e1c th\u1ef1c v\u00e0 hi\u1ec7u l\u1ef1c c\u1ee7a ch\u1ee9ng ch\u1ec9 t\u1eeb m\u00e1y ch\u1ee7. N\u1ebfu x\u00e1c th\u1ef1c th\u00e0nh c\u00f4ng, kh\u00e1ch h\u00e0ng s\u1ebd t\u1ea1o ra m\u1ed9t \u201ckh\u00f3a ch\u00ednh t\u1ea1m th\u1eddi\u201d (pre-master key), sau \u0111\u00f3 s\u1eed d\u1ee5ng kh\u00f3a c\u00f4ng khai c\u00f3 trong ch\u1ee9ng ch\u1ec9 m\u00e1y ch\u1ee7 \u0111\u1ec3 m\u00e3 h\u00f3a kh\u00f3a n\u00e0y, v\u00e0 g\u1eedi kh\u00f3a \u0111\u00e3 \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a v\u1ec1 m\u00e1y ch\u1ee7.<br \/>\n4. T\u1ea1o kh\u00f3a cu\u1ed9c tr\u00f2 chuy\u1ec7n v\u00e0 ho\u00e0n t\u1ea5t qu\u00e1 tr\u00ecnh giao ti\u1ebfp: M\u00e1y ch\u1ee7 s\u1eed d\u1ee5ng kh\u00f3a ri\u00eang c\u1ee7a m\u00ecnh \u0111\u1ec3 gi\u1ea3i m\u00e3 v\u00e0 thu \u0111\u01b0\u1ee3c kh\u00f3a ch\u00ednh s\u01a1 b\u1ed9 (pre-master key). L\u00fac n\u00e0y, c\u1ea3 m\u00e1y kh\u00e1ch v\u00e0 m\u00e1y ch\u1ee7 \u0111\u1ec1u c\u00f3 ba y\u1ebfu t\u1ed1: s\u1ed1 ng\u1eabu nhi\u00ean c\u1ee7a m\u00e1y kh\u00e1ch, s\u1ed1 ng\u1eabu nhi\u00ean c\u1ee7a m\u00e1y ch\u1ee7, v\u00e0 kh\u00f3a ch\u00ednh s\u01a1 b\u1ed9. C\u1ea3 hai b\u00ean s\u1eed d\u1ee5ng c\u00f9ng m\u1ed9t thu\u1eadt to\u00e1n \u0111\u1ec3 t\u1ea1o ra \u201ckh\u00f3a cu\u1ed9c tr\u00f2 chuy\u1ec7n\u201d (session key) gi\u1ed1ng nhau d\u1ef1a tr\u00ean ba th\u00f4ng s\u1ed1 n\u00e0y. Sau \u0111\u00f3, c\u1ea3 hai trao \u0111\u1ed5i th\u00f4ng \u0111i\u1ec7p \u201cFinished\u201d v\u00e0 m\u00e3 h\u00f3a n\u00f3 b\u1eb1ng kh\u00f3a cu\u1ed9c tr\u00f2 chuy\u1ec7n v\u1eeba t\u1ea1o ra, \u0111\u1ec3 x\u00e1c nh\u1eadn r\u1eb1ng qu\u00e1 tr\u00ecnh giao ti\u1ebfp \u0111\u00e3 th\u00e0nh c\u00f4ng v\u00e0 c\u00e1c kh\u00f3a l\u00e0 nh\u1ea5t qu\u00e1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ebfn \u0111\u00e2y, k\u00eanh truy\u1ec1n th\u00f4ng an to\u00e0n \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp xong. T\u1ea5t c\u1ea3 d\u1eef li\u1ec7u \u1edf t\u1ea7ng \u1ee9ng d\u1ee5ng (d\u1eef li\u1ec7u HTTP) sau n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a v\u00e0 truy\u1ec1n \u0111i b\u1eb1ng kh\u00f3a cu\u1ed9c tr\u00f2 chuy\u1ec7n \u0111\u1ed1i x\u1ee9ng hi\u1ec7u qu\u1ea3 n\u00e0y, \u0111\u1ea3m b\u1ea3o s\u1ef1 an to\u00e0n trong giao ti\u1ebfp c\u0169ng nh\u01b0 s\u1ef1 c\u00e2n b\u1eb1ng gi\u1eefa hi\u1ec7u n\u0103ng v\u00e0 b\u1ea3o m\u1eadt.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Th\u1ef1c h\u00e0nh v\u1ec1 vi\u1ec7c thu th\u1eadp, c\u00e0i \u0111\u1eb7t v\u00e0 c\u1ea5u h\u00ecnh ch\u1ee9ng ch\u1ec9 SSL<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c tri\u1ec3n khai ch\u1ee9ng ch\u1ec9 SSL cho trang web l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh c\u00f3 h\u1ec7 th\u1ed1ng, bao g\u1ed3m c\u00e1c b\u01b0\u1edbc ch\u00ednh nh\u01b0: n\u1ed9p \u0111\u01a1n xin c\u1ea5p ch\u1ee9ng ch\u1ec9, x\u00e1c th\u1ef1c th\u00f4ng tin, c\u00e0i \u0111\u1eb7t ch\u1ee9ng ch\u1ec9 v\u00e0 b\u1ea3o tr\u00ec ch\u1ee9ng ch\u1ec9 sau n\u00e0y.<\/p>\n<!-- AUTO_INTERNAL_LINKS_START --><p>\u0110\u1ecdc th\u00eam <a href=\"https:\/\/www.likacloud.com\/ar\/knowledge\/ssl-certificate\/ssl-certificate-guide-how-it-works-types-deployment\/\">T\u00ecm hi\u1ec3u s\u00e2u v\u1ec1 ch\u1ee9ng ch\u1ec9 SSL: Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng, l\u1ef1a ch\u1ecdn lo\u1ea1i ch\u1ee9ng ch\u1ec9 v\u00e0 h\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n v\u1ec1 c\u00e1ch tri\u1ec3n khai<\/a>\u3002<\/p><!-- AUTO_INTERNAL_LINKS_END -->\n\n\n\n\n<h3 class=\"wp-block-heading\">Quy tr\u00ecnh n\u1ed9p \u0111\u01a1n v\u00e0 x\u00e1c th\u1ef1c ch\u1ee9ng ch\u1ec9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc ti\u00ean, b\u1ea1n c\u1ea7n mua ho\u1eb7c y\u00eau c\u1ea7u c\u1ea5p m\u1ed9t ch\u1ee9ng ch\u1ec9 mi\u1ec5n ph\u00ed t\u1eeb t\u1ed5 ch\u1ee9c c\u1ea5p ch\u1ee9ng ch\u1ec9 (CA) ho\u1eb7c \u0111\u1ea1i l\u00fd c\u1ee7a h\u1ecd. Trong qu\u00e1 tr\u00ecnh n\u1ed9p \u0111\u01a1n, b\u1ea1n s\u1ebd c\u1ea7n t\u1ea1o m\u1ed9t t\u1ec7p tin c\u00f3 t\u00ean \u201cY\u00eau c\u1ea7u k\u00fd ch\u1ee9ng ch\u1ec9\u201d (Certificate Signing Request \u2013 CSR). T\u1ec7p CSR ch\u1ee9a kh\u00f3a c\u00f4ng khai c\u1ee7a b\u1ea1n c\u00f9ng v\u1edbi th\u00f4ng tin v\u1ec1 t\u1ed5 ch\u1ee9c m\u00e0 b\u1ea1n mu\u1ed1n g\u1eafn ch\u1ee9ng ch\u1ec9 v\u00e0o. Sau khi n\u1ed9p CSR, CA s\u1ebd ti\u1ebfn h\u00e0nh qu\u00e1 tr\u00ecnh x\u00e1c th\u1ef1c t\u01b0\u01a1ng \u1ee9ng t\u00f9y theo lo\u1ea1i ch\u1ee9ng ch\u1ec9 b\u1ea1n y\u00eau c\u1ea7u (DV\/OV\/EV).<br \/>\n\u0110\u1ed1i v\u1edbi c\u00e1c ch\u1ee9ng ch\u1ec9 DV (Domain Validation), qu\u00e1 tr\u00ecnh x\u00e1c th\u1ef1c th\u01b0\u1eddng \u0111\u01b0\u1ee3c ho\u00e0n t\u1ea5t trong v\u00f2ng v\u00e0i ph\u00fat \u0111\u1ebfn v\u00e0i gi\u1edd, v\u00e0 th\u1ee7 t\u1ee5c kh\u00e1 \u0111\u01a1n gi\u1ea3n. Trong khi \u0111\u00f3, c\u00e1c ch\u1ee9ng ch\u1ec9 OV (Organization Validation) v\u00e0 EV (Extended Validation) y\u00eau c\u1ea7u ph\u1ea3i n\u1ed9p c\u00e1c t\u00e0i li\u1ec7u ph\u00e1p l\u00fd nh\u01b0 gi\u1ea5y ph\u00e9p kinh doanh, v\u00e0 c\u00f3 th\u1ec3 c\u1ea7n qua qu\u00e1 tr\u00ecnh xem x\u00e9t th\u1ee7 c\u00f4ng, k\u00e9o d\u00e0i t\u1eeb v\u00e0i ng\u00e0y \u0111\u1ebfn v\u00e0i tu\u1ea7n. Sau khi x\u00e1c th\u1ef1c th\u00e0nh c\u00f4ng, t\u1ed5 ch\u1ee9c c\u1ea5p ch\u1ee9ng ch\u1ec9 (CA \u2013 Certificate Authority) s\u1ebd ph\u00e1t h\u00e0nh t\u1ec7p ch\u1ee9ng ch\u1ec9 (th\u01b0\u1eddng bao g\u1ed3m t\u1ec7p.crt v\u00e0 chu\u1ed7i ch\u1ee9ng ch\u1ec9 trung gian n\u1ebfu c\u00f3) \u0111\u1ec3 b\u1ea1n t\u1ea3i v\u1ec1.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e0i \u0111\u1eb7t v\u00e0 c\u1ea5u h\u00ecnh m\u00e1y ch\u1ee7<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c b\u01b0\u1edbc c\u00e0i \u0111\u1eb7t s\u1ebd kh\u00e1c nhau t\u00f9y thu\u1ed9c v\u00e0o ph\u1ea7n m\u1ec1m m\u00e1y ch\u1ee7 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 v\u00ed d\u1ee5 v\u1ec1 hai ph\u1ea7n m\u1ec1m ph\u1ed5 bi\u1ebfn l\u00e0 Nginx v\u00e0 Apache:<br \/>\n- Nginx: B\u1ea1n c\u1ea7n t\u1ea3i l\u00ean c\u00e1c t\u1ec7p ch\u1ee9ng ch\u1ec9 \u0111\u00e3 t\u1ea3i xu\u1ed1ng (.crt) v\u00e0 t\u1ec7p kh\u00f3a ri\u00eang t\u01b0 (.key) v\u00e0o th\u01b0 m\u1ee5c ch\u1ec9 \u0111\u1ecbnh tr\u00ean m\u00e1y ch\u1ee7, sau \u0111\u00f3 s\u1eeda \u0111\u1ed5i trong t\u1ec7p c\u1ea5u h\u00ecnh trang web <code data-no-auto-translation=\"\">server<\/code> Kh\u1ed1i, \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh <code data-no-auto-translation=\"\">ssl_certificate<\/code> \u548c <code data-no-auto-translation=\"\">ssl_certificate_key<\/code> \u0110\u01b0\u1eddng d\u1eabn t\u1edbi d\u1ecbch v\u1ee5 \u0111\u00f3, v\u00e0 l\u1eafng nghe tr\u00ean c\u1ed5ng 443.<br \/>\n- Apache: T\u01b0\u01a1ng t\u1ef1 c\u1ea7n t\u1ea3i l\u00ean ch\u1ee9ng ch\u1ec9 v\u00e0 kh\u00f3a ri\u00eang t\u01b0, sau \u0111\u00f3 k\u00edch ho\u1ea1t c\u00f4ng c\u1ee5 SSL trong c\u1ea5u h\u00ecnh m\u00e1y ch\u1ee7 \u1ea3o, th\u00f4ng qua <code data-no-auto-translation=\"\">SSLCertificateFile<\/code> \u548c <code data-no-auto-translation=\"\">SSLCertificateKeyFile<\/code> L\u1ec7nh ch\u1ec9 \u0111\u1ecbnh \u0111\u01b0\u1eddng d\u1eabn t\u1edbi t\u1ec7p tin.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sau khi c\u00e0i \u0111\u1eb7t, h\u00e3y \u0111\u1ea3m b\u1ea3o th\u1ef1c hi\u1ec7n vi\u1ec7c chuy\u1ec3n h\u01b0\u1edbng to\u00e0n b\u1ed9 l\u01b0u l\u01b0\u1ee3ng HTTP sang HTTPS \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng m\u1ecdi y\u00eau c\u1ea7u truy c\u1eadp \u0111\u1ec1u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n qua k\u1ebft n\u1ed1i an to\u00e0n. Ngo\u00e0i ra, vi\u1ec7c c\u1ea5u h\u00ecnh ti\u00eau \u0111\u1ec1 HSTS (HTTP Strict Transport Security) s\u1ebd gi\u00fap h\u01b0\u1edbng d\u1eabn tr\u00ecnh duy\u1ec7t s\u1eed d\u1ee5ng giao th\u1ee9c HTTPS tr\u1ef1c ti\u1ebfp trong m\u1ed9t th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh, t\u1eeb \u0111\u00f3 n\u00e2ng cao m\u1ee9c \u0111\u1ed9 b\u1ea3o m\u1eadt.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Qu\u1ea3n l\u00fd ch\u1ee9ng ch\u1ec9 v\u00e0 b\u1ea3o tr\u00ec vi\u1ec7c gia h\u1ea1n ch\u00fang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">SSL\u8bc1\u4e66\u6709\u660e\u786e\u7684\u6709\u6548\u671f\uff08\u76ee\u524d\u6700\u957f\u4e3a13\u4e2a\u6708\uff09\u3002\u8fc7\u671f\u672a\u7eed\u671f\u7684\u8bc1\u4e66\u4f1a\u5bfc\u81f4\u6d4f\u89c8\u5668\u663e\u793a\u4e25\u91cd\u7684\u5b89\u5168\u8b66\u544a\uff0c\u4e2d\u65ad\u7f51\u7ad9\u670d\u52a1\u3002\u56e0\u6b64\uff0c\u8bbe\u7f6e\u8bc1\u4e66\u5230\u671f\u63d0\u9192\u81f3\u5173\u91cd\u8981\u3002\u8bb8\u591a\u8bc1\u4e66\u63d0\u4f9b\u5546\u548c\u670d\u52a1\u5668\u7ba1\u7406\u5de5\u5177\u652f\u6301\u81ea\u52a8\u7eed\u671f\u529f\u80fd\uff0c\u5bf9\u4e8e\u652f\u6301ACME\u534f\u8bae\u7684DV\u8bc1\u4e66\uff0c\u53ef\u4ee5\u4f7f\u7528Let\u2018s Encrypt\u7b49\u514d\u8d39CA\u914d\u5408Certbot\u7b49\u5de5\u5177\u5b9e\u73b0\u5168\u81ea\u52a8\u5316\u7684\u7533\u8bf7\u3001\u5b89\u88c5\u548c\u7eed\u671f\uff0c\u6781\u5927\u5730\u7b80\u5316\u4e86\u7ef4\u62a4\u5de5\u4f5c\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">T\u00f3m l\u1ea1i<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">SSL ch\u1ee9ng ch\u1ec9 \u0111\u00e3 t\u1eebng l\u00e0 m\u1ed9t t\u00ednh n\u0103ng n\u00e2ng cao t\u00f9y ch\u1ecdn, nh\u01b0ng ng\u00e0y nay \u0111\u00e3 tr\u1edf th\u00e0nh y\u00eau c\u1ea7u thi\u1ebft y\u1ebfu trong ho\u1ea1t \u0111\u1ed9ng v\u1eadn h\u00e0nh trang web hi\u1ec7n \u0111\u1ea1i v\u00e0 l\u00e0 n\u1ec1n t\u1ea3ng c\u01a1 b\u1ea3n cho an ninh tr\u00ean m\u1ea1ng internet. N\u00f3 thi\u1ebft l\u1eadp m\u1ed9t \u201cc\u1ea7u n\u1ed1i tin c\u1eady\u201d gi\u1eefa trang web v\u00e0 ng\u01b0\u1eddi truy c\u1eadp th\u00f4ng qua c\u00e1c c\u01a1 ch\u1ebf x\u00e1c th\u1ef1c danh t\u00ednh ch\u1eb7t ch\u1ebd, \u0111\u1ed3ng th\u1eddi s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng ngh\u1ec7 m\u00e3 h\u00f3a b\u1ea5t \u0111\u1ed1i x\u1ee9ng v\u00e0 \u0111\u1ed1i x\u1ee9ng m\u1ea1nh m\u1ebd \u0111\u1ec3 b\u1ea3o v\u1ec7 t\u00ednh b\u00ed m\u1eadt v\u00e0 to\u00e0n v\u1eb9n d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n t\u1ea3i. T\u1eeb vi\u1ec7c l\u1ef1a ch\u1ecdn ch\u1ee9ng ch\u1ec9 DV mi\u1ec5n ph\u00ed cho blog c\u00e1 nh\u00e2n \u0111\u1ebfn vi\u1ec7c tri\u1ec3n khai ch\u1ee9ng ch\u1ec9 EV v\u1edbi thanh \u0111\u1ecba ch\u1ec9 m\u00e0u xanh l\u00e1 cho c\u00e1c n\u1ec1n t\u1ea3ng doanh nghi\u1ec7p l\u1edbn, vi\u1ec7c hi\u1ec3u r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u00e1c lo\u1ea1i ch\u1ee9ng ch\u1ec9 l\u00e0 \u0111i\u1ec1u ki\u1ec7n ti\u00ean quy\u1ebft \u0111\u1ec3 \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh \u0111\u00fang \u0111\u1eafn. Vi\u1ec7c n\u1eafm v\u1eefng nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e1c ch\u1ee9ng ch\u1ec9 n\u00e0y, c\u0169ng nh\u01b0 quy tr\u00ecnh \u0111\u1ea7y \u0111\u1ee7 t\u1eeb vi\u1ec7c n\u1ed9p \u0111\u01a1n, x\u00e1c th\u1ef1c \u0111\u1ebfn c\u00e0i \u0111\u1eb7t v\u00e0 c\u1ea5u h\u00ecnh, l\u00e0 k\u1ef9 n\u0103ng c\u1ea7n thi\u1ebft \u0111\u1ed1i v\u1edbi m\u1ecdi chuy\u00ean gia c\u00f4ng ngh\u1ec7 nh\u1eb1m \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c d\u1ecbch v\u1ee5 m\u1ea1ng \u0111\u01b0\u1ee3c an to\u00e0n, \u0111\u00e1ng tin c\u1eady v\u00e0 \u1ed5n \u0111\u1ecbnh. Trong th\u1eddi \u0111\u1ea1i k\u1ef9 thu\u1eadt s\u1ed1 ng\u00e0y c\u00e0ng ch\u00fa tr\u1ecdng \u0111\u1ebfn quy\u1ec1n ri\u00eang t\u01b0 v\u00e0 an ninh, vi\u1ec7c tri\u1ec3n khai v\u00e0 b\u1ea3o tr\u00ec SSL ch\u1ee9ng ch\u1ec9 m\u1ed9t c\u00e1ch \u0111\u00fang c\u00e1ch l\u00e0 tr\u00e1ch nhi\u1ec7m c\u01a1 b\u1ea3n \u0111\u1ed1i v\u1edbi ng\u01b0\u1eddi d\u00f9ng, \u0111\u1ed3ng th\u1eddi c\u0169ng l\u00e0 l\u00e1 ch\u1eafn v\u1eefng ch\u1eafc cho s\u1ef1 ph\u00e1t tri\u1ec3n l\u00e2u d\u00e0i c\u1ee7a doanh nghi\u1ec7p.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">FAQ \u5e38\u89c1\u95ee\u9898<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Ch\u1ee9ng ch\u1ec9 SSL mi\u1ec5n ph\u00ed v\u00e0 tr\u1ea3 ph\u00ed kh\u00e1c nhau th\u1ebf n\u00e0o?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u514d\u8d39\u8bc1\u4e66\uff08\u5982Let\u2018s Encrypt\u7b7e\u53d1\uff09\u901a\u5e38\u4ec5\u662f\u57df\u540d\u9a8c\u8bc1\u578b\u8bc1\u4e66\uff0c\u4ec5\u63d0\u4f9b\u57fa\u7840\u7684\u52a0\u5bc6\u529f\u80fd\uff0c\u6709\u6548\u671f\u8f83\u77ed\uff0890\u5929\uff09\uff0c\u9700\u8981\u9891\u7e41\u7eed\u671f\uff0c\u4f46\u53ef\u901a\u8fc7\u81ea\u52a8\u5316\u5de5\u5177\u89e3\u51b3\u3002\u4ed8\u8d39\u8bc1\u4e66\u5219\u63d0\u4f9b\u66f4\u4e30\u5bcc\u7684\u9009\u62e9\uff0c\u5305\u62ecOV\u548cEV\u8bc1\u4e66\uff0c\u63d0\u4f9b\u66f4\u4e25\u683c\u7684\u8eab\u4efd\u9a8c\u8bc1\u548c\u66f4\u9ad8\u7684\u4fe1\u4efb\u5c55\u793a\uff08\u5982\u7eff\u8272\u5730\u5740\u680f\uff09\uff0c\u540c\u65f6\u63d0\u4f9b\u66f4\u957f\u7684\u6709\u6548\u671f\u3001\u66f4\u9ad8\u7684\u4fdd\u4fee\u91d1\u989d\u4ee5\u53ca\u4e13\u4e1a\u7684\u4eba\u5de5\u6280\u672f\u652f\u6301\u670d\u52a1\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Vi\u1ec7c c\u00e0i \u0111\u1eb7t ch\u1ee9ng ch\u1ec9 SSL c\u00f3 th\u1ef1c s\u1ef1 \u0111\u1ea3m b\u1ea3o an to\u00e0n tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng ph\u1ea3i v\u1eady. Ch\u1ee9ng ch\u1ec9 SSL ch\u1ee7 y\u1ebfu \u0111\u1ea3m b\u1ea3o an to\u00e0n cho d\u1eef li\u1ec7u trong qu\u00e1 tr\u00ecnh truy\u1ec1n t\u1ea3i (b\u1eb1ng c\u00e1ch m\u00e3 h\u00f3a v\u00e0 ki\u1ec3m tra t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a d\u1eef li\u1ec7u). N\u00f3 kh\u00f4ng th\u1ec3 ng\u0103n ch\u1eb7n vi\u1ec7c m\u00e1y ch\u1ee7 web b\u1ecb x\u00e2m nh\u1eadp b\u1edfi tin t\u1eb7c (ch\u1eb3ng h\u1ea1n th\u00f4ng qua c\u00e1c l\u1ed7 h\u1ed5ng \u0111\u1ec3 t\u1ea3i ph\u1ea7n m\u1ec1m \u0111\u1ed9c h\u1ea1i), kh\u00f4ng th\u1ec3 ch\u1ed1ng l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS, v\u00e0 c\u0169ng kh\u00f4ng th\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng m\u00e3 ngu\u1ed3n c\u1ee7a trang web kh\u00f4ng ch\u1ee9a l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt. An ninh trang web l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng \u0111a t\u1ea7ng, to\u00e0n di\u1ec7n; ch\u1ee9ng ch\u1ec9 SSL l\u00e0 m\u1ed9t ph\u1ea7n r\u1ea5t quan tr\u1ecdng trong h\u1ec7 th\u1ed1ng \u0111\u00f3, nh\u01b0ng kh\u00f4ng ph\u1ea3i l\u00e0 t\u1ea5t c\u1ea3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">T\u1ea1i sao trang web c\u1ee7a t\u00f4i \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t ch\u1ee9ng ch\u1ec9 SSL nh\u01b0ng tr\u00ecnh duy\u1ec7t v\u1eabn hi\u1ec3n th\u1ecb th\u00f4ng b\u00e1o \u201cKh\u00f4ng an to\u00e0n\u201d?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 do nhi\u1ec1u nguy\u00ean nh\u00e2n kh\u00e1c nhau g\u00e2y ra. Nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 trang web \u0111ang s\u1eed d\u1ee5ng k\u1ebft h\u1ee3p c\u00e1c t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c truy\u1ec1n t\u1ea3i qua giao th\u1ee9c HTTP (ch\u1eb3ng h\u1ea1n nh\u01b0 h\u00ecnh \u1ea3nh, script, b\u1ea3ng \u0111\u1ecbnh d\u1ea1ng) m\u00e0 kh\u00f4ng \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a b\u1eb1ng HTTPS, khi\u1ebfn to\u00e0n b\u1ed9 trang \u0111\u01b0\u1ee3c coi l\u00e0 kh\u00f4ng an to\u00e0n. C\u00e1ch gi\u1ea3i quy\u1ebft l\u00e0 \u0111\u1ea3m b\u1ea3o r\u1eb1ng t\u1ea5t c\u1ea3 c\u00e1c li\u00ean k\u1ebft \u0111\u1ebfn c\u00e1c t\u00e0i nguy\u00ean \u0111\u1ec1u s\u1eed d\u1ee5ng giao th\u1ee9c HTTPS. C\u00e1c nguy\u00ean nh\u00e2n kh\u00e1c bao g\u1ed3m: ch\u1ee9ng ch\u1ec9 \u0111\u00e3 h\u1ebft h\u1ea1n, ch\u1ee9ng ch\u1ec9 kh\u00f4ng kh\u1edbp v\u1edbi t\u00ean mi\u1ec1n \u0111\u01b0\u1ee3c truy c\u1eadp, ho\u1eb7c thi\u1ebfu chu\u1ed7i ch\u1ee9ng ch\u1ec9 trung gian.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ch\u1ee9ng ch\u1ec9 \u0111a t\u00ean mi\u1ec1n v\u00e0 ch\u1ee9ng ch\u1ec9 th\u00f4ng d\u1ee5ng, c\u00e1i n\u00e0o t\u1ed1t h\u01a1n?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y ph\u1ee5 thu\u1ed9c v\u00e0o nhu c\u1ea7u c\u1ee5 th\u1ec3. N\u1ebfu b\u1ea1n c\u1ea7n b\u1ea3o v\u1ec7 nhi\u1ec1u t\u00ean mi\u1ec1n ch\u00ednh ho\u00e0n to\u00e0n kh\u00e1c nhau (v\u00ed d\u1ee5: example.com v\u00e0 othersite.net), th\u00ec vi\u1ec7c s\u1eed d\u1ee5ng nhi\u1ec1u ch\u1ee9ng ch\u1ec9 t\u00ean mi\u1ec1n l\u00e0 l\u1ef1a ch\u1ecdn duy nh\u1ea5t. Ng\u01b0\u1ee3c l\u1ea1i, n\u1ebfu b\u1ea1n c\u1ea7n b\u1ea3o v\u1ec7 m\u1ed9t t\u00ean mi\u1ec1n ch\u00ednh c\u00f9ng t\u1ea5t c\u1ea3 c\u00e1c t\u00ean mi\u1ec1n con c\u00f9ng c\u1ea5p c\u1ee7a n\u00f3 (v\u00ed d\u1ee5: shop.example.com, blog.example.com, mail.example.com), th\u00ec ch\u1ee9ng ch\u1ec9 c\u00f3 k\u00fd t\u1ef1 \u0111\u1ea1i di\u1ec7n (*.example.com) th\u01b0\u1eddng mang l\u1ea1i nhi\u1ec1u l\u1ee3i th\u1ebf v\u1ec1 m\u1eb7t qu\u1ea3n l\u00fd v\u00e0 chi ph\u00ed; ch\u1ec9 c\u1ea7n m\u1ed9t ch\u1ee9ng ch\u1ec9 duy nh\u1ea5t l\u00e0 c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 t\u1ea5t c\u1ea3 c\u00e1c t\u00ean mi\u1ec1n con \u0111\u00f3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110i\u1ec1u g\u00ec x\u1ea3y ra sau khi ch\u1ee9ng ch\u1ec9 SSL h\u1ebft h\u1ea1n?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ngay khi ch\u1ee9ng ch\u1ec9 SSL h\u1ebft h\u1ea1n, tr\u00ecnh duy\u1ec7t v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1ch s\u1ebd nh\u1eadn \u0111\u01b0\u1ee3c c\u1ea3nh b\u00e1o r\u00f5 r\u00e0ng v\u1ec1 m\u1ee9c \u0111\u1ed9 \u201ckh\u00f4ng an to\u00e0n\u201d, cho bi\u1ebft k\u1ebft n\u1ed1i kh\u00f4ng \u0111\u01b0\u1ee3c b\u1ea3o m\u1eadt, v\u00e0 c\u00f3 th\u1ec3 ng\u0103n ng\u01b0\u1eddi d\u00f9ng ti\u1ebfp t\u1ee5c truy c\u1eadp v\u00e0o trang web \u0111\u00f3. \u0110i\u1ec1u n\u00e0y s\u1ebd l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 m\u1ee9c \u0111\u1ed9 tin c\u1eady c\u1ee7a trang web, \u1ea3nh h\u01b0\u1edfng x\u1ea5u \u0111\u1ebfn tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng, v\u00e0 th\u1eadm ch\u00ed g\u00e2y ra gi\u00e1n \u0111o\u1ea1n trong ho\u1ea1t \u0111\u1ed9ng kinh doanh. Do \u0111\u00f3, c\u1ea7n thi\u1ebft ph\u1ea3i thi\u1ebft l\u1eadp c\u00e1c c\u01a1 ch\u1ebf gi\u00e1m s\u00e1t v\u00e0 gia h\u1ea1n ch\u1ee9ng ch\u1ec9 m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng ch\u00fang \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt tr\u01b0\u1edbc khi h\u1ebft h\u1ea1n.<\/p>","protected":false},"excerpt":{"rendered":"<p>SSL ch\u1ee9ng ch\u1ec9 l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ec3 th\u1ef1c hi\u1ec7n vi\u1ec7c m\u00e3 h\u00f3a v\u00e0 x\u00e1c th\u1ef1c danh t\u00ednh cho c\u00e1c trang web s\u1eed d\u1ee5ng giao th\u1ee9c HTTPS. B\u00e0i vi\u1ebft n\u00e0y tr\u00ecnh b\u00e0y chi ti\u1ebft v\u1ec1 vai tr\u00f2 c\u1ed1t l\u00f5i c\u1ee7a SSL ch\u1ee9ng ch\u1ec9 (x\u00e1c th\u1ef1c danh t\u00ednh, m\u00e3 h\u00f3a d\u1eef li\u1ec7u v\u00e0 b\u1ea3o v\u1ec7 t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u), ph\u00e2n t\u00edch s\u00e2u r\u1ed9ng s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u00e1c lo\u1ea1i ch\u1ee9ng ch\u1ec9 ch\u00ednh nh\u01b0 DV, OV, EV c\u00f9ng c\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng ph\u00f9 h\u1ee3p, \u0111\u1ed3ng th\u1eddi gi\u1ea3i th\u00edch nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng v\u00e0 qu\u00e1 tr\u00ecnh thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i (handshake) c\u1ee7a giao th\u1ee9c SSL\/TLS, cung c\u1ea5p h\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n cho vi\u1ec7c tri\u1ec3n khai c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt cho trang web.<\/p>","protected":false},"author":7,"featured_media":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"tags":[11,336,338],"knowledge_category":[277],"class_list":["post-12366235","knowledge_post","type-knowledge_post","status-publish","hentry","tag-ssl-certificate","tag-encryption-technology","tag-cybersecurity","knowledge_category-ssl-certificate"],"acf":{"site_seo_keywords":"SSL\u8bc1\u4e66,TLS\u534f\u8bae,\u8bc1\u4e66\u7c7b\u578b,HTTPS\u52a0\u5bc6,\u7f51\u7ad9\u5b89\u5168,SSL\u63e1\u624b\u8fc7\u7a0b,\u901a\u914d\u7b26\u8bc1\u4e66,OV\u8bc1\u4e66\u9a8c\u8bc1"},"_links":{"self":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_posts\/12366235","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_posts"}],"about":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/types\/knowledge_post"}],"author":[{"embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/users\/7"}],"version-history":[{"count":0,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_posts\/12366235\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/media?parent=12366235"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/tags?post=12366235"},{"taxonomy":"knowledge_category","embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_category?post=12366235"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}