{"id":12362367,"date":"2026-03-11T19:40:12","date_gmt":"2026-03-11T11:40:12","guid":{"rendered":"https:\/\/www.likacloud.com\/knowledge\/ssl%e8%af%81%e4%b9%a6%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f%e7%b1%bb%e5%9e%8b%e3%80%81%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86%e4%b8%8e%e9%83%a8%e7%bd%b2%e6%8c%87%e5%8d%97%e5%85%a8%e8%a7%a3%e6%9e%90\/"},"modified":"2026-03-11T20:10:46","modified_gmt":"2026-03-11T12:10:46","slug":"ssl-certificate-types-how-it-works-deployment-guide-e7-9f-a5-e8-af-86","status":"publish","type":"knowledge_post","link":"https:\/\/www.likacloud.com\/vi\/knowledge\/ssl-certificate\/ssl-certificate-types-how-it-works-deployment-guide-e7-9f-a5-e8-af-86\/","title":{"rendered":"Ch\u1ee9ng ch\u1ec9 SSL l\u00e0 g\u00ec? H\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n v\u1ec1 C\u00e1c lo\u1ea1i, Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng v\u00e0 Tri\u1ec3n khai"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Trong th\u1ebf gi\u1edbi k\u1ef9 thu\u1eadt s\u1ed1 ng\u00e0y nay, b\u1ea3o m\u1eadt trang web kh\u00f4ng c\u00f2n l\u00e0 m\u1ed9t t\u00f9y ch\u1ecdn n\u1eefa, m\u00e0 l\u00e0 n\u1ec1n t\u1ea3ng c\u01a1 b\u1ea3n \u0111\u1ec3 x\u00e2y d\u1ef1ng l\u00f2ng tin c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, b\u1ea3o v\u1ec7 quy\u1ec1n ri\u00eang t\u01b0 d\u1eef li\u1ec7u v\u00e0 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 tu\u00e2n th\u1ee7 quy \u0111\u1ecbnh ph\u00e1p l\u00fd. Khi ch\u00fang ta truy c\u1eadp m\u1ed9t trang web v\u00e0 th\u1ea5y bi\u1ec3u t\u01b0\u1ee3ng kh\u00f3a ho\u1eb7c ti\u1ec1n t\u1ed1 \u201chttps\u201d xu\u1ea5t hi\u1ec7n trong thanh \u0111\u1ecba ch\u1ec9 tr\u00ecnh duy\u1ec7t, th\u00ec c\u00f4ng ngh\u1ec7 SSL\/TLS c\u00f9ng v\u1edbi ch\u1ee9ng ch\u1ec9 SSL ch\u00ednh l\u00e0 y\u1ebfu t\u1ed1 b\u1ea3o v\u1ec7 an to\u00e0n k\u1ebft n\u1ed1i m\u1ed9t c\u00e1ch \u00e2m th\u1ea7m. SSL kh\u00f4ng ch\u1ec9 l\u00e0 c\u00f4ng c\u1ee5 \u0111\u1ec3 m\u00e3 h\u00f3a d\u1eef li\u1ec7u, m\u00e0 c\u00f2n \u0111\u00f3ng vai tr\u00f2 nh\u01b0 \u201cch\u1ee9ng minh th\u01b0 \u0111i\u1ec7n t\u1eed\u201d c\u1ee7a trang web, \u0111\u1ea3m b\u1ea3o r\u1eb1ng cu\u1ed9c trao \u0111\u1ed5i gi\u1eefa ng\u01b0\u1eddi d\u00f9ng v\u00e0 m\u00e1y ch\u1ee7 kh\u00f4ng b\u1ecb nghe l\u00e9n ho\u1eb7c s\u1eeda \u0111\u1ed5i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u0110\u1ecbnh ngh\u0129a c\u1ed1t l\u00f5i v\u00e0 ch\u1ee9c n\u0103ng c\u1ee7a ch\u1ee9ng ch\u1ec9 SSL<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">SSL ch\u1ee9ng ch\u1ec9, n\u00f3i m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c h\u01a1n, hi\u1ec7n nay th\u01b0\u1eddng \u0111\u1ec1 c\u1eadp \u0111\u1ebfn ng\u01b0\u1eddi k\u1ebf nhi\u1ec7m c\u1ee7a n\u00f3 l\u00e0 TLS ch\u1ee9ng ch\u1ec9, l\u00e0 m\u1ed9t lo\u1ea1i ch\u1ee9ng ch\u1ec9 s\u1ed1 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf theo ti\u00eau chu\u1ea9n giao th\u1ee9c SSL\/TLS. Ch\u1ee9ng ch\u1ec9 n\u00e0y do c\u00e1c t\u1ed5 ch\u1ee9c c\u1ea5p ch\u1ee9ng ch\u1ec9 \u0111\u00e1ng tin c\u1eady c\u1ea5p ph\u00e1t, v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a gi\u1eefa ph\u00eda m\u00e1y kh\u00e1ch (ch\u1eb3ng h\u1ea1n nh\u01b0 tr\u00ecnh duy\u1ec7t) v\u00e0 ph\u00eda m\u00e1y ch\u1ee7 (trang web).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">X\u00e1c th\u1ef1c danh t\u00ednh v\u00e0 x\u00e2y d\u1ef1ng l\u00f2ng tin<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t trong nh\u1eefng ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a ch\u1ee9ng ch\u1ec9 SSL l\u00e0 x\u00e1c th\u1ef1c danh t\u00ednh. Ch\u1ee9ng ch\u1ec9 ch\u1ee9a th\u00f4ng tin v\u1ec1 ch\u1ee7 s\u1edf h\u1eefu trang web (nh\u01b0 t\u00ean mi\u1ec1n, t\u00ean c\u00f4ng ty, v.v.) v\u00e0 \u0111\u01b0\u1ee3c t\u1ed5 ch\u1ee9c c\u1ea5p ch\u1ee9ng ch\u1ec9 (CA \u2013 Certificate Authority) ki\u1ec3m tra m\u1ed9t c\u00e1ch nghi\u00eam ng\u1eb7t. Khi ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp trang web, tr\u00ecnh duy\u1ec7t s\u1ebd ki\u1ec3m tra t\u00ednh h\u1ee3p l\u1ec7 c\u1ee7a ch\u1ee9ng ch\u1ec9 c\u0169ng nh\u01b0 th\u00f4ng tin v\u1ec1 t\u1ed5 ch\u1ee9c \u0111\u00e3 c\u1ea5p ch\u1ee9ng ch\u1ec9 \u0111\u00f3. Ch\u1ec9 nh\u1eefng ch\u1ee9ng ch\u1ec9 \u0111\u1ebfn t\u1eeb c\u00e1c t\u1ed5 ch\u1ee9c CA \u0111\u00e1ng tin c\u1eady m\u1edbi \u0111\u01b0\u1ee3c tr\u00ecnh duy\u1ec7t hi\u1ec3n th\u1ecb bi\u1ec3u t\u01b0\u1ee3ng kh\u00f3a an to\u00e0n, th\u00f4ng b\u00e1o cho ng\u01b0\u1eddi d\u00f9ng r\u1eb1ng h\u1ecd \u0111ang giao ti\u1ebfp v\u1edbi m\u1ed9t th\u1ef1c th\u1ec3 \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c th\u1ef1c, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t trang web l\u1eeba \u0111\u1ea3o.<\/p>\n<!-- AUTO_INTERNAL_LINKS_START --><p>\u0110\u1ecdc th\u00eam <a href=\"https:\/\/www.likacloud.com\/de\/knowledge\/ssl-certificate\/ssl-certificate-guide-principles-types-installation-deployment\/\">Gi\u1ea3i th\u00edch chi ti\u1ebft v\u1ec1 ch\u1ee9ng ch\u1ec9 SSL: t\u1eeb nguy\u00ean t\u1eafc ho\u1ea1t \u0111\u1ed9ng, l\u1ef1a ch\u1ecdn lo\u1ea1i ch\u1ee9ng ch\u1ec9 \u0111\u1ebfn h\u01b0\u1edbng d\u1eabn c\u00e0i \u0111\u1eb7t v\u00e0 tri\u1ec3n khai<\/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 t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t vai tr\u00f2 quan tr\u1ecdng kh\u00e1c c\u1ee7a SSL l\u00e0 m\u00e3 h\u00f3a d\u1eef li\u1ec7u. Ch\u1ee9ng ch\u1ec9 SSL cho ph\u00e9p m\u00e1y ch\u1ee7 v\u00e0 m\u00e1y kh\u00e1ch th\u1ecfa thu\u1eadn m\u1ed9t b\u1ed9 kh\u00f3a m\u00e3 h\u00f3a \u0111\u1ed9c nh\u1ea5t, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 m\u00e3 h\u00f3a t\u1ea5t c\u1ea3 d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n \u0111i. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 ngay c\u1ea3 khi d\u1eef li\u1ec7u b\u1ecb ch\u1eb7n trong qu\u00e1 tr\u00ecnh truy\u1ec1n t\u1ea3i, k\u1ebb t\u1ea5n c\u00f4ng c\u0169ng ch\u1ec9 nh\u00ecn th\u1ea5y nh\u1eefng k\u00fd t\u1ef1 kh\u00f4ng th\u1ec3 hi\u1ec3u \u0111\u01b0\u1ee3c. \u0110\u1ed3ng th\u1eddi, giao th\u1ee9c TLS c\u0169ng \u0111\u1ea3m b\u1ea3o r\u1eb1ng d\u1eef li\u1ec7u kh\u00f4ng b\u1ecb s\u1eeda \u0111\u1ed5i trong qu\u00e1 tr\u00ecnh truy\u1ec1n, t\u1eeb \u0111\u00f3 b\u1ea3o v\u1ec7 t\u00ednh to\u00e0n v\u1eb9n 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<h2 class=\"wp-block-heading\">Chi ti\u1ebft v\u1ec1 c\u00e1c lo\u1ea1i ch\u1ee9ng ch\u1ec9 SSL ch\u00ednh<\/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 \u1ee9ng d\u1ee5ng, ch\u1ee9ng ch\u1ec9 SSL \u0111\u01b0\u1ee3c chia th\u00e0nh ba lo\u1ea1i ch\u00ednh nh\u1eb1m \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 b\u1ea3o m\u1eadt v\u00e0 \u0111\u1ed9 tin c\u1eady trong c\u00e1c t\u00ecnh hu\u1ed1ng 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 c\u00f3 m\u1ee9c \u0111\u1ed9 x\u00e1c th\u1ef1c th\u1ea5p nh\u1ea5t nh\u01b0ng t\u1ed1c \u0111\u1ed9 c\u1ea5p ph\u00e1t nhanh nh\u1ea5t. Trung t\u00e2m ch\u1ee9ng th\u1ef1c (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 x\u00e1c th\u1ef1c qua email ho\u1eb7c b\u1eb1ng c\u00e1c b\u1ea3n ghi DNS). DV ch\u1ee9ng ch\u1ec9 ch\u1ec9 cung c\u1ea5p c\u00e1c ch\u1ee9c n\u0103ng m\u00e3 h\u00f3a d\u1eef li\u1ec7u c\u01a1 b\u1ea3n, v\u00e0 th\u00f4ng tin trong ch\u1ee9ng ch\u1ec9 kh\u00f4ng bao g\u1ed3m t\u00ean c\u1ee7a doanh nghi\u1ec7p. Do \u0111\u00f3, n\u00f3 r\u1ea5t ph\u00f9 h\u1ee3p cho c\u00e1c trang web c\u00e1 nh\u00e2n, blog ho\u1eb7c m\u00f4i tr\u01b0\u1eddng th\u1eed nghi\u1ec7m n\u1ed9i b\u1ed9, v\u1edbi chi ph\u00ed th\u1ea5p h\u01a1n.<\/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\">OV ch\u1ee9ng ch\u1ec9 cung c\u1ea5p m\u1ee9c \u0111\u1ed9 x\u00e1c th\u1ef1c cao h\u01a1n. Ngo\u00e0i vi\u1ec7c x\u00e1c minh quy\u1ec1n s\u1edf h\u1eefu t\u00ean mi\u1ec1n, t\u1ed5 ch\u1ee9c c\u1ea5p ch\u1ee9ng ch\u1ec9 (CA) c\u00f2n ki\u1ec3m tra t\u00ednh x\u00e1c th\u1ef1c v\u00e0 h\u1ee3p ph\u00e1p c\u1ee7a t\u1ed5 ch\u1ee9c n\u1ed9p \u0111\u01a1n, ch\u1eb3ng h\u1ea1n nh\u01b0 th\u00f4ng tin \u0111\u0103ng k\u00fd c\u1ee7a c\u00f4ng ty t\u1ea1i c\u01a1 quan ch\u00ednh ph\u1ee7. Th\u00f4ng tin chi ti\u1ebft v\u1ec1 ch\u1ee9ng ch\u1ec9 s\u1ebd bao g\u1ed3m t\u00ean c\u00f4ng ty, \u0111i\u1ec1u n\u00e0y gi\u00fap t\u0103ng c\u01b0\u1eddng s\u1ef1 tin t\u01b0\u1edfng c\u1ee7a ng\u01b0\u1eddi truy c\u1eadp, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u0111\u1ed1i v\u1edbi c\u00e1c kh\u00e1ch h\u00e0ng doanh nghi\u1ec7p. OV ch\u1ee9ng ch\u1ec9 l\u00e0 l\u1ef1a ch\u1ecdn l\u00fd t\u01b0\u1edfng cho c\u00e1c trang web doanh nghi\u1ec7p v\u00e0 h\u1ec7 th\u1ed1ng th\u00e0nh vi\u00ean.<\/p>\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 s\u1ef1 tin t\u01b0\u1edfng cao nh\u1ea5t. Quy tr\u00ecnh n\u1ed9p \u0111\u01a1n \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c ch\u1ee9ng ch\u1ec9 n\u00e0y r\u1ea5t nghi\u00eam ng\u1eb7t; c\u00e1c t\u1ed5 ch\u1ee9c c\u1ea5p ch\u1ee9ng ch\u1ec9 (CA \u2013 Certificate Authorities) s\u1ebd ti\u1ebfn h\u00e0nh ki\u1ec3m tra k\u1ef9 l\u01b0\u1ee1ng v\u1ec1 l\u1ecbch s\u1eed ho\u1ea1t \u0111\u1ed9ng v\u00e0 uy t\u00edn c\u1ee7a t\u1ed5 ch\u1ee9c \u0111\u0103ng k\u00fd. Trang web s\u1edf h\u1eefu ch\u1ee9ng ch\u1ec9 EV s\u1ebd \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb t\u00ean c\u00f4ng ty ho\u1eb7c bi\u1ec3u t\u01b0\u1ee3ng kh\u00f3a m\u00e0u xanh l\u00e1 trong thanh \u0111\u1ecba ch\u1ec9 tr\u00ean h\u1ea7u h\u1ebft c\u00e1c tr\u00ecnh duy\u1ec7t ph\u1ed5 bi\u1ebfn, \u0111\u00e2y l\u00e0 d\u1ea5u hi\u1ec7u c\u1ee7a m\u1ee9c \u0111\u1ed9 tin t\u01b0\u1edfng cao nh\u1ea5t c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y b\u1eb1ng m\u1eaft th\u01b0\u1eddng. Ch\u1ee9ng ch\u1ec9 n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c 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 v\u00e0 c\u01a1 quan ch\u00ednh ph\u1ee7 s\u1eed d\u1ee5ng<\/p>\n<!-- AUTO_INTERNAL_LINKS_START --><p>\u0110\u1ecdc th\u00eam <a href=\"https:\/\/www.likacloud.com\/de\/knowledge\/ssl-certificate\/what-is-ssl-certificate-principle-deployment-secure-website-data-transmission\/\">Ch\u1ee9ng ch\u1ec9 SSL l\u00e0 g\u00ec: t\u1eeb nguy\u00ean t\u1eafc ho\u1ea1t \u0111\u1ed9ng \u0111\u1ebfn tri\u1ec3n khai, \u0111\u1ea3m b\u1ea3o an to\u00e0n cho vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u tr\u00ean website m\u1ed9t c\u00e1ch to\u00e0n di\u1ec7n.<\/a>\u3002<\/p><!-- AUTO_INTERNAL_LINKS_END -->\n\n\n\n\n<h3 class=\"wp-block-heading\">Ph\u00e2n lo\u1ea1i theo ph\u1ea1m vi bao ph\u1ee7<\/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 s\u1eed d\u1ee5ng 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 c\u00f9ng t\u1ea5t c\u1ea3 c\u00e1c t\u00ean mi\u1ec1n con c\u00f9ng c\u1ea5p (v\u00ed d\u1ee5: *.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\u00e1c nhau trong c\u00f9ng m\u1ed9t ch\u1ee9ng ch\u1ec9, mang l\u1ea1i s\u1ef1 thu\u1eadn ti\u1ec7n trong qu\u1ea3n l\u00fd \u0111\u1ed1i v\u1edbi c\u00e1c doanh nghi\u1ec7p s\u1edf h\u1eefu nhi\u1ec1u th\u01b0\u01a1ng hi\u1ec7u ho\u1eb7c l\u0129nh v\u1ef1c kinh doanh.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a giao th\u1ee9c SSL\/TLS<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Giao th\u1ee9c SSL\/TLS handshake l\u00e0 qu\u00e1 tr\u00ecnh thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a; n\u00f3 di\u1ec5n ra tr\u01b0\u1edbc khi kh\u00e1ch h\u00e0ng v\u00e0 m\u00e1y ch\u1ee7 th\u1ef1c s\u1ef1 truy\u1ec1n d\u1eef li\u1ec7u \u1ee9ng d\u1ee5ng. \u0110\u00e2y l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh th\u1ecfa thu\u1eadn \u201cb\u00ed m\u1eadt\u201d \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf m\u1ed9t c\u00e1ch tinh vi v\u00e0 hi\u1ec7u qu\u1ea3.<\/p>\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\">Khi kh\u00e1ch h\u00e0ng (client) c\u1ed1 g\u1eafng k\u1ebft n\u1ed1i v\u1edbi m\u1ed9t m\u00e1y ch\u1ee7 HTTPS, kh\u00e1ch h\u00e0ng s\u1ebd g\u1eedi \u0111i m\u1ed9t th\u00f4ng \u0111i\u1ec7p g\u1ecdi l\u00e0 \u201cl\u1eddi ch\u00e0o t\u1eeb kh\u00e1ch h\u00e0ng\u201d (client greeting), trong \u0111\u00f3 n\u00eau r\u00f5 c\u00e1c phi\u00ean b\u1ea3n TLS m\u00e0 kh\u00e1ch h\u00e0ng h\u1ed7 tr\u1ee3 c\u0169ng nh\u01b0 danh s\u00e1ch c\u00e1c b\u1ed9 c\u00f4ng c\u1ee5 m\u00e3 h\u00f3a (encryption suites) m\u00e0 kh\u00e1ch h\u00e0ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng.<\/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<p class=\"wp-block-paragraph\">M\u00e1y ch\u1ee7 tr\u1ea3 l\u1eddi b\u1eb1ng th\u00f4ng \u0111i\u1ec7p \u201cCh\u00e0o m\u1eebng t\u1eeb m\u00e1y ch\u1ee7\u201d, ch\u1ecdn thu\u1eadt to\u00e1n m\u00e3 h\u00f3a \u0111\u01b0\u1ee3c c\u1ea3 hai b\u00ean h\u1ed7 tr\u1ee3, v\u00e0 g\u1eedi ch\u1ee9ng ch\u1ec9 SSL c\u1ee7a m\u00ecnh (bao g\u1ed3m kh\u00f3a c\u00f4ng khai).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00e1ch h\u00e0ng s\u1ebd ki\u1ec3m tra t\u00ednh x\u00e1c th\u1ef1c c\u1ee7a ch\u1ee9ng ch\u1ec9 m\u00e1y ch\u1ee7 (b\u1eb1ng c\u00e1ch xem x\u00e9t ch\u1eef k\u00fd, th\u1eddi h\u1ea1n hi\u1ec7u l\u1ef1c, v\u00e0 x\u00e1c \u0111\u1ecbnh xem ch\u1ee9ng ch\u1ec9 c\u00f3 b\u1ecb thu h\u1ed3i hay kh\u00f4ng). Sau khi ki\u1ec3m tra th\u00e0nh c\u00f4ng, kh\u00e1ch h\u00e0ng s\u1ebd t\u1ea1o m\u1ed9t \u201ckh\u00f3a ch\u1ee7 tr\u01b0\u1edbc\u201d ng\u1eabu nhi\u00ean, sau \u0111\u00f3 m\u00e3 h\u00f3a kh\u00f3a \u0111\u00f3 b\u1eb1ng kh\u00f3a c\u00f4ng khai c\u00f3 trong ch\u1ee9ng ch\u1ec9 m\u00e1y ch\u1ee7 v\u00e0 g\u1eedi n\u00f3 v\u1ec1 m\u00e1y ch\u1ee7.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">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 \u201ckh\u00f3a ch\u1ee7 tr\u01b0\u1edbc\u201d (pre-master key). T\u1eeb \u0111\u00f3, c\u1ea3 hai b\u00ean s\u1ebd d\u1ef1a tr\u00ean kh\u00f3a ch\u1ee7 tr\u01b0\u1edbc n\u00e0y c\u00f9ng v\u1edbi c\u00e1c s\u1ed1 ng\u1eabu nhi\u00ean \u0111\u00e3 trao \u0111\u1ed5i tr\u01b0\u1edbc \u0111\u00f3 \u0111\u1ec3 t\u00ednh to\u00e1n ra \u201ckh\u00f3a ch\u1ee7\u201d (master key) gi\u1ed1ng nhau, v\u00e0 t\u1eeb kh\u00f3a ch\u1ee7 n\u00e0y s\u1ebd t\u1ea1o ra c\u00e1c kh\u00f3a m\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng d\u00f9ng cho vi\u1ec7c giao ti\u1ebfp ti\u1ebfp theo.<\/p>\n<!-- AUTO_INTERNAL_LINKS_START --><p>\u0110\u1ecdc th\u00eam <a href=\"https:\/\/www.likacloud.com\/de\/knowledge\/ssl-certificate\/ssl-certificate-guide-types-application-installation-e7-9f-a5-e8-af-86\/\">H\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n v\u1ec1 ch\u1ee9ng ch\u1ec9 SSL: T\u1eeb vai tr\u00f2, ph\u00e2n lo\u1ea1i \u0111\u1ebfn quy tr\u00ecnh c\u1ea5p ph\u00e1t v\u00e0 c\u00e0i \u0111\u1eb7t<\/a>\u3002<\/p><!-- AUTO_INTERNAL_LINKS_END -->\n\n\n\n\n<p class=\"wp-block-paragraph\">Hai b\u00ean trao \u0111\u1ed5i m\u1ed9t th\u00f4ng \u0111i\u1ec7p \u201cHo\u00e0n t\u1ea5t\u201d \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a b\u1eb1ng kh\u00f3a m\u1edbi, \u0111\u1ec3 x\u00e1c nh\u1eadn r\u1eb1ng qu\u00e1 tr\u00ecnh k\u1ebft n\u1ed1i (handshake) \u0111\u00e3 di\u1ec5n ra th\u00e0nh c\u00f4ng. Sau \u0111\u00f3, t\u1ea5t c\u1ea3 d\u1eef li\u1ec7u \u1edf t\u1ea7ng \u1ee9ng d\u1ee5ng s\u1ebd \u0111\u01b0\u1ee3c truy\u1ec1n \u0111i m\u1ed9t c\u00e1ch an to\u00e0n b\u1eb1ng ph\u01b0\u01a1ng th\u1ee9c m\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng hi\u1ec7u qu\u1ea3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">S\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa m\u00e3 h\u00f3a b\u1ea5t \u0111\u1ed1i x\u1ee9ng v\u00e0 m\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Qu\u00e1 tr\u00ecnh b\u1eaft tay n\u00e0y kh\u00e9o l\u00e9o k\u1ebft h\u1ee3p nh\u1eefng \u01b0u \u0111i\u1ec3m c\u1ee7a hai ph\u01b0\u01a1ng th\u1ee9c m\u00e3 h\u00f3a kh\u00e1c nhau. M\u00e3 h\u00f3a b\u1ea5t \u0111\u1ed1i x\u1ee9ng (c\u1eb7p kh\u00f3a c\u00f4ng\/kh\u00f3a ri\u00eang) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 trao \u0111\u1ed5i \u201ckh\u00f3a ch\u00ednh tr\u01b0\u1edbc\u201d m\u1ed9t c\u00e1ch an to\u00e0n, gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 ph\u00e2n ph\u1ed1i kh\u00f3a. Trong qu\u00e1 tr\u00ecnh giao ti\u1ebfp ti\u1ebfp theo, ch\u00fang ta chuy\u1ec3n sang s\u1eed d\u1ee5ng m\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng, v\u00ec m\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng cho t\u1ed1c \u0111\u1ed9 cao h\u01a1n v\u00e0 ti\u00eau th\u1ee5 \u00edt t\u00e0i nguy\u00ean t\u00ednh to\u00e1n h\u01a1n khi m\u00e3 h\u00f3a v\u00e0 gi\u1ea3i m\u00e3 l\u01b0\u1ee3ng d\u1eef li\u1ec7u l\u1edbn. M\u00f4 h\u00ecnh k\u1ebft h\u1ee3p n\u00e0y \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 c\u00e2n b\u1eb1ng t\u1ed1i \u01b0u gi\u1eefa an ninh v\u00e0 hi\u1ec7u n\u0103ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">H\u01b0\u1edbng d\u1eabn tri\u1ec3n khai th\u1ef1c t\u1ebf v\u00e0 c\u00e1c th\u1ef1c ti\u1ec5n t\u1ed1t nh\u1ea5t<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c thu th\u1eadp v\u00e0 tri\u1ec3n khai \u0111\u00fang c\u00e1ch ch\u1ee9ng ch\u1ec9 SSL l\u00e0 b\u01b0\u1edbc then ch\u1ed1t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ch\u00fang ph\u00e1t huy t\u1ed1i \u0111a hi\u1ec7u qu\u1ea3 c\u1ee7a m\u00ecnh. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c kh\u00e2u c\u1ed1t l\u00f5i trong qu\u00e1 tr\u00ecnh tri\u1ec3n khai c\u00f9ng v\u1edbi m\u1ed9t s\u1ed1 g\u1ee3i \u00fd v\u1ec1 vi\u1ec7c b\u1ea3o tr\u00ec ch\u1ee9ng ch\u1ec9 SSL m\u1ed9t c\u00e1ch th\u01b0\u1eddng xuy\u00ean.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Quy tr\u00ecnh n\u1ed9p \u0111\u01a1n v\u00e0 nh\u1eadn ch\u1ee9ng ch\u1ec9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc ti\u00ean, b\u1ea1n c\u1ea7n t\u1ea1o m\u1ed9t y\u00eau c\u1ea7u k\u00fd ch\u1ee9ng ch\u1ec9 (certificate signing request) c\u00f9ng m\u1ed9t c\u1eb7p kh\u00f3a (kh\u00f3a c\u00f4ng khai v\u00e0 kh\u00f3a ri\u00eang t\u01b0) tr\u00ean m\u00e1y ch\u1ee7 ho\u1eb7c n\u1ec1n t\u1ea3ng l\u01b0u tr\u1eef. Kh\u00f3a ri\u00eang t\u01b0 ph\u1ea3i \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef m\u1ed9t c\u00e1ch an to\u00e0n tuy\u1ec7t \u0111\u1ed1i tr\u00ean m\u00e1y ch\u1ee7.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sau \u0111\u00f3, h\u00e3y g\u1eedi y\u00eau c\u1ea7u x\u00e1c th\u1ef1c (CSR \u2013 Certificate Signing Request) \u0111\u1ebfn CA (Certificate Authority) m\u00e0 b\u1ea1n \u0111\u00e3 ch\u1ecdn. 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 m\u00e0 b\u1ea1n y\u00eau c\u1ea7u (DV, OV, EV). Sau khi qu\u00e1 tr\u00ecnh x\u00e1c th\u1ef1c \u0111\u01b0\u1ee3c ho\u00e0n t\u1ea5t, CA s\u1ebd c\u1ea5p t\u00e0i li\u1ec7u ch\u1ee9ng ch\u1ec9 (th\u01b0\u1eddng bao g\u1ed3m ch\u00ednh ch\u1ee9ng ch\u1ec9 v\u00e0 chu\u1ed7i ch\u1ee9ng ch\u1ec9 trung gian, n\u1ebfu c\u00f3).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cu\u1ed1i c\u00f9ng, h\u00e3y tri\u1ec3n khai t\u1ec7p ch\u1ee9ng ch\u1ec9 v\u00e0 chu\u1ed7i ch\u1ee9ng ch\u1ec9 trung gian \u0111\u00e3 nh\u1eadn \u0111\u01b0\u1ee3c l\u00ean m\u00e1y ch\u1ee7 web (ch\u1eb3ng h\u1ea1n nh\u01b0 Nginx, Apache, IIS, v.v.), v\u00e0 c\u1ea5u h\u00ecnh ch\u00fang sao cho ch\u00fang \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi kh\u00f3a ri\u00eang (private key) \u0111\u00e3 \u0111\u01b0\u1ee3c t\u1ea1o tr\u01b0\u1edbc \u0111\u00f3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u1ea5u h\u00ecnh v\u00e0 t\u1ed1i \u01b0u h\u00f3a m\u00e1y ch\u1ee7<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c tri\u1ec3n khai kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 c\u00e0i \u0111\u1eb7t c\u00e1c \u1ee9ng d\u1ee5ng hay d\u1ecbch v\u1ee5. \u0110\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee9c \u0111\u1ed9 b\u1ea3o m\u1eadt cao h\u01a1n, c\u1ea7n ph\u1ea3i th\u1ef1c hi\u1ec7n c\u00e1c thi\u1ebft l\u1eadp t\u1ed1i \u01b0u h\u00f3a ph\u00f9 h\u1ee3p. V\u00ed d\u1ee5, c\u1ea7n v\u00f4 hi\u1ec7u h\u00f3a c\u00e1c phi\u00ean b\u1ea3n SSL\/TLS c\u0169 v\u00e0 kh\u00f4ng an to\u00e0n (nh\u01b0 SSLv2, SSLv3, th\u1eadm ch\u00ed TLS 1.0\/1.1) trong c\u1ea5u h\u00ecnh m\u00e1y ch\u1ee7, v\u00e0 \u01b0u ti\u00ean s\u1eed d\u1ee5ng c\u00e1c phi\u00ean b\u1ea3n TLS 1.2 ho\u1eb7c TLS 1.3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ea7n c\u1ea5u h\u00ecnh c\u00e1c g\u00f3i m\u00e3 h\u00f3a an to\u00e0n, \u01b0u ti\u00ean s\u1eed d\u1ee5ng c\u00e1c g\u00f3i m\u00e3 h\u00f3a c\u00f3 t\u00ednh b\u1ea3o m\u1eadt m\u1ed9t chi\u1ec1u (forward secrecy). Nh\u1edd \u0111\u00f3, ngay c\u1ea3 khi kh\u00f3a ri\u00eang c\u1ee7a m\u00e1y ch\u1ee7 b\u1ecb l\u1ed9 trong t\u01b0\u01a1ng lai, c\u00e1c ghi ch\u00e9p truy\u1ec1n th\u00f4ng \u0111\u00e3 b\u1ecb thu th\u1eadp tr\u01b0\u1edbc \u0111\u00f3 c\u0169ng kh\u00f4ng th\u1ec3 b\u1ecb gi\u1ea3i m\u00e3. \u0110\u1ed3ng th\u1eddi, h\u00e3y b\u1eadt t\u00ednh n\u0103ng HTTP Strict Transport Security (HTSS) \u0111\u1ec3 bu\u1ed9c tr\u00ecnh duy\u1ec7t lu\u00f4n s\u1eed d\u1ee5ng giao th\u1ee9c HTTPS khi truy c\u1eadp trang web.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Qu\u1ea3n l\u00fd v\u00f2ng \u0111\u1eddi ch\u1ee9ng ch\u1ec9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ee9ng ch\u1ec9 SSL kh\u00f4ng c\u00f3 hi\u1ec7u l\u1ef1c v\u0129nh vi\u1ec5n. C\u00e1c ti\u00eau chu\u1ea9n ng\u00e0nh \u0111\u00e3 y\u00eau c\u1ea7u r\u00fat ng\u1eafn th\u1eddi h\u1ea1n hi\u1ec7u l\u1ef1c t\u1ed1i \u0111a c\u1ee7a ch\u1ee9ng ch\u1ec9, do \u0111\u00f3 vi\u1ec7c gi\u00e1m s\u00e1t v\u00e0 qu\u1ea3n l\u00fd ch\u00fang m\u1ed9t c\u00e1ch th\u01b0\u1eddng xuy\u00ean l\u00e0 r\u1ea5t quan tr\u1ecdng. H\u00e3y lu\u00f4n ghi ch\u00e9p ng\u00e0y h\u1ebft h\u1ea1n c\u1ee7a ch\u1ee9ng ch\u1ec9, v\u00e0 khuy\u1ebfn ngh\u1ecb gia h\u1ea1n ho\u1eb7c thay th\u1ebf ch\u00fang \u00edt nh\u1ea5t m\u1ed9t th\u00e1ng tr\u01b0\u1edbc khi ch\u00fang h\u1ebft h\u1ea1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c tri\u1ec3n khai ch\u1ee9c n\u0103ng t\u1ef1 \u0111\u1ed9ng gia h\u1ea1n gi\u1ea5y ph\u00e9p (ch\u1ee9ng ch\u1ec9) (ch\u1eb3ng h\u1ea1n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 t\u1ef1 \u0111\u1ed9ng h\u00f3a d\u1ef1a tr\u00ean giao th\u1ee9c ACME) l\u00e0 c\u00e1ch t\u1ed1t nh\u1ea5t \u0111\u1ec3 tr\u00e1nh t\u00ecnh tr\u1ea1ng trang web b\u1ecb ng\u1eaft k\u1ebft n\u1ed1i do gi\u1ea5y ph\u00e9p h\u1ebft h\u1ea1n. \u0110\u1ed3ng th\u1eddi, n\u1ebfu nghi ng\u1edd r\u1eb1ng kh\u00f3a ri\u00eang t\u01b0\u01a1ng \u1ee9ng \u0111\u00e3 b\u1ecb r\u00f2 r\u1ec9, c\u1ea7n ngay l\u1eadp t\u1ee9c y\u00eau c\u1ea7u nh\u00e0 cung c\u1ea5p ch<\/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 (Secure Sockets Layer) ch\u1ee9ng ch\u1ec9 l\u00e0 c\u00f4ng ngh\u1ec7 n\u1ec1n t\u1ea3ng quan tr\u1ecdng \u0111\u1ec3 x\u00e2y d\u1ef1ng m\u1ed9t m\u1ea1ng Internet an to\u00e0n v\u00e0 \u0111\u00e1ng tin c\u1eady. N\u00f3 b\u1ea3o v\u1ec7 t\u00ednh b\u00ed m\u1eadt v\u00e0 to\u00e0n v\u1eb9n c\u1ee7a d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n t\u1ea3i nh\u1edd v\u00e0o c\u00e1c algoritma m\u00e3 h\u00f3a m\u1ea1nh m\u1ebd, \u0111\u1ed3ng th\u1eddi cung c\u1ea5p s\u1ef1 x\u00e1c th\u1ef1c danh t\u00ednh cho c\u00e1c trang web th\u00f4ng qua c\u01a1 ch\u1ebf x\u00e1c th\u1ef1c c\u1ee7a c\u00e1c t\u1ed5 ch\u1ee9c ch\u1ee9ng nh\u1eadn (CA \u2013 Certificate Authorities). T\u1eeb c\u00e1c ch\u1ee9ng ch\u1ec9 DV (Domain Validation) c\u01a1 b\u1ea3n \u0111\u1ebfn c\u00e1c ch\u1ee9ng ch\u1ec9 EV (Extended Validation) mang m\u1ee9c \u0111\u1ed9 tin c\u1eady cao nh\u1ea5t, c\u00f3 nhi\u1ec1u lo\u1ea1i ch\u1ee9ng ch\u1ec9 kh\u00e1c nhau ph\u1ee5c v\u1ee5 nhu c\u1ea7u \u0111a d\u1ea1ng c\u1ee7a t\u1eebng \u0111\u1ed1i t\u01b0\u1ee3ng, t\u1eeb c\u00e1 nh\u00e2n \u0111\u1ebfn c\u00e1c doanh nghi\u1ec7p l\u1edbn. Vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ch\u00fang s\u1ebd gi\u00fap ch\u00fang ta c\u1ea5u h\u00ecnh v\u00e0 b\u1ea3o tr\u00ec h\u1ec7 th\u1ed1ng m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 h\u01a1n; vi\u1ec7c tu\u00e2n th\u1ee7 c\u00e1c th\u1ef1c ti\u1ec5n t\u1ed1t nh\u1ea5t trong qu\u00e1 tr\u00ecnh tri\u1ec3n khai v\u00e0 qu\u1ea3n l\u00fd v\u00f2ng \u0111\u1eddi ch\u1ee9ng ch\u1ec9 l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt lu\u00f4n ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3. Trong b\u1ed1i c\u1ea3nh c\u00e1c m\u1ed1i \u0111e d\u1ecda an ninh m\u1ea1ng ng\u00e0y c\u00e0ng ph\u1ee9c t\u1ea1p, vi\u1ec7c tri\u1ec3n khai \u0111\u00fang c\u00e1ch giao th\u1ee9c HTTPS \u0111\u00e3 tr\u1edf th\u00e0nh c\u00f4ng vi\u1ec7c c\u01a1 b\u1ea3n kh\u00f4ng th\u1ec3 thi\u1ebfu.<\/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\">Trang web kh\u00f4ng c\u00f3 ch\u1ee9c n\u0103ng giao d\u1ecbch; li\u1ec7u v\u1eabn c\u1ea7n ch\u1ee9ng ch\u1ec9 SSL kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00e2ng, \u0111i\u1ec1u \u0111\u00f3 r\u1ea5t c\u1ea7n thi\u1ebft. Ngay c\u1ea3 khi trang web kh\u00f4ng x\u1eed l\u00fd th\u00f4ng tin thanh to\u00e1n, ch\u00fang v\u1eabn c\u00f3 th\u1ec3 ch\u1ee9a d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m nh\u01b0 th\u00f4ng tin \u0111\u0103ng nh\u1eadp ng\u01b0\u1eddi d\u00f9ng, n\u1ed9i dung \u0111\u01b0\u1ee3c g\u1eedi qua c\u00e1c bi\u1ec3u m\u1eabu, ho\u1eb7c l\u1ecbch s\u1eed truy c\u1eadp ri\u00eang t\u01b0. Ch\u1ee9ng ch\u1ec9 SSL gi\u00fap b\u1ea3o v\u1ec7 nh\u1eefng d\u1eef li\u1ec7u n\u00e0y kh\u1ecfi b\u1ecb nghe l\u00e9n ho\u1eb7c s\u1eeda \u0111\u1ed5i. H\u01a1n n\u1eefa, c\u00e1c tr\u00ecnh duy\u1ec7t hi\u1ec7n \u0111\u1ea1i s\u1ebd \u0111\u00e1nh d\u1ea5u c\u00e1c trang web kh\u00f4ng s\u1eed d\u1ee5ng HTTPS l\u00e0 \u201ckh\u00f4ng an to\u00e0n\u201d, \u0111i\u1ec1u n\u00e0y \u1ea3nh h\u01b0\u1edfng nghi\u00eam tr\u1ecdng \u0111\u1ebfn l\u00f2ng tin c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 h\u00ecnh \u1ea3nh chuy\u00ean nghi\u1ec7p c\u1ee7a trang web. C\u00e1c c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm c\u0169ng coi vi\u1ec7c s\u1eed d\u1ee5ng HTTPS l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 t\u00edch c\u1ef1c trong vi\u1ec7c x\u1ebfp h\u1ea1ng trang web.<\/p>\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\u9881\u53d1\u7684\uff09\u901a\u5e38\u662fDV\u8bc1\u4e66\uff0c\u63d0\u4f9b\u4e86\u4e0e\u4ed8\u8d39DV\u8bc1\u4e66\u76f8\u540c\u7684\u52a0\u5bc6\u5f3a\u5ea6\uff0c\u975e\u5e38\u9002\u5408\u4e2a\u4eba\u548c\u5c0f\u578b\u9879\u76ee\u3002\u4e3b\u8981\u533a\u522b\u5728\u4e8e\uff1a\u514d\u8d39\u8bc1\u4e66\u6709\u6548\u671f\u8f83\u77ed\uff08\u901a\u5e3890\u5929\uff09\uff0c\u9700\u8981\u66f4\u9891\u7e41\u5730\u81ea\u52a8\u7eed\u8ba2\uff1b\u4e00\u822c\u4e0d\u542b\u6280\u672f\u652f\u6301\u6216\u8d54\u4ed8\u4fdd\u969c\uff1b\u4e14\u65e0\u6cd5\u63d0\u4f9bOV\u6216EV\u7ea7\u522b\u7684\u7ec4\u7ec7\u8eab\u4efd\u9a8c\u8bc1\u3002\u4ed8\u8d39\u8bc1\u4e66\u5219\u63d0\u4f9b\u66f4\u957f\u7684\u6709\u6548\u671f\u3001\u6280\u672f\u652f\u6301\u3001\u8d44\u91d1\u4fdd\u969c\u4ee5\u53ca\u66f4\u9ad8\u7ea7\u522b\u7684\u9a8c\u8bc1\u670d\u52a1\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Vi\u1ec7c tri\u1ec3n khai ch\u1ee9ng ch\u1ec9 SSL c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 website kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Qu\u00e1 tr\u00ecnh giao ti\u1ebfp (handshake) trong TLS khi thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a s\u1ebd g\u00e2y ra m\u1ed9t \u0111\u1ed9 tr\u1ec5 nh\u1ecf, do c\u1ea7n th\u00eam c\u00e1c l\u1ea7n truy\u1ec1n d\u1eef li\u1ec7u qua m\u1ea1ng v\u00e0 c\u00e1c ph\u00e9p t\u00ednh b\u1ed5 sung. Tuy nhi\u00ean, giao th\u1ee9c TLS hi\u1ec7n \u0111\u1ea1i (\u0111\u1eb7c bi\u1ec7t l\u00e0 TLS 1.3) \u0111\u00e3 \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a, gi\u00fap gi\u1ea3m \u0111\u00e1ng k\u1ec3 \u0111\u1ed9 tr\u1ec5 n\u00e0y. M\u1ed9t khi k\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp, vi\u1ec7c s\u1eed d\u1ee5ng m\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng \u0111\u1ec3 m\u00e3 h\u00f3a v\u00e0 gi\u1ea3i m\u00e3 d\u1eef li\u1ec7u g\u1ea7n nh\u01b0 kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 x\u1eed l\u00fd; \u0111i\u1ec1u n\u00e0y th\u01b0\u1eddng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c b\u00f9 \u0111\u1eafp b\u1edfi s\u1ee9c m\u1ea1nh x\u1eed l\u00fd c\u1ee7a ph\u1ea7n c\u1ee9ng tr\u00ean c\u00e1c m\u00e1y ch\u1ee7 hi\u1ec7n \u0111\u1ea1i. Nh\u00ecn chung, l\u1ee3i \u00edch v\u1ec1 m\u1eb7t b\u1ea3o m\u1eadt l\u1edbn h\u01a1n nhi\u1ec1u so v\u1edbi nh\u1eefng chi ph\u00ed hi\u1ec7u n\u0103ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c coi l\u00e0 kh\u00f4ng \u0111\u00e1ng k\u1ec3, v\u00e0 hi\u1ec7u n\u0103ng t\u1ed5ng th\u1ec3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n nh\u1edd c\u00e1c giao th\u1ee9c nh\u01b0 HTTP\/2.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 m\u1ed9t ch\u1ee9ng ch\u1ec9 SSL c\u1ee7a trang web c\u00f3 an to\u00e0n v\u00e0 \u0111\u00e1ng tin c\u1eady kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n c\u00f3 th\u1ec3 ki\u1ec3m tra chi ti\u1ebft ch\u1ee9ng ch\u1ec9 b\u1eb1ng c\u00e1ch nh\u1ea5p v\u00e0o bi\u1ec3u t\u01b0\u1ee3ng kh\u00f3a \u1edf thanh \u0111\u1ecba ch\u1ec9 tr\u00ecnh duy\u1ec7t. M\u1ed9t ch\u1ee9ng ch\u1ec9 an to\u00e0n s\u1ebd \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb v\u1edbi tr\u1ea1ng th\u00e1i \u201cH\u1ee3p l\u1ec7\u201d ho\u1eb7c \u201cK\u1ebft n\u1ed1i an to\u00e0n\u201d, v\u00e0 b\u1ea1n c\u00f3 th\u1ec3 xem n\u00f3 \u0111\u01b0\u1ee3c c\u1ea5p cho ai, b\u1edfi ai, c\u0169ng nh\u01b0 th\u1eddi h\u1ea1n hi\u1ec7u l\u1ef1c c\u1ee7a n\u00f3. Nh\u1eefng tr\u01b0\u1eddng h\u1ee3p c\u1ea7n l\u01b0u \u00fd bao g\u1ed3m: ch\u1ee9ng ch\u1ec9 \u0111\u00e3 h\u1ebft h\u1ea1n ho\u1eb7c ch\u01b0a c\u00f3 hi\u1ec7u l\u1ef1c; t\u00ean mi\u1ec1n tr\u00ean ch\u1ee9ng ch\u1ec9 kh\u00f4ng tr\u00f9ng kh\u1edbp v\u1edbi trang web m\u00e0 b\u1ea1n \u0111ang truy c\u1eadp; c\u01a1 quan c\u1ea5p ch\u1ee9ng ch\u1ec9 kh\u00f4ng \u0111\u01b0\u1ee3c tr\u00ecnh duy\u1ec7t c\u1ee7a b\u1ea1n tin t\u01b0\u1edfng (tr\u00ecnh duy\u1ec7t s\u1ebd hi\u1ec3n th\u1ecb c\u1ea3nh b\u00e1o r\u00f5 r\u00e0ng). T\u1ea5t c\u1ea3 nh\u1eefng \u0111i\u1ec1u n\u00e0y \u0111\u1ec1u c\u00f3 th\u1ec3 ng\u1ee5 \u00fd v\u1ec1 nguy c\u01a1 b\u1ea3o m\u1eadt.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e1c ch\u1ee9ng ch\u1ec9 s\u1eed d\u1ee5ng k\u00fd t\u1ef1 \u0111\u1ea1i di\u1ec7n (wildcard certificates) c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 b\u1ea5t k\u1ef3 t\u00ean mi\u1ec1n con (subdomain) n\u00e0o kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u1ea5y t\u1edd ch\u1ee9ng ch\u1ec9 s\u1eed d\u1ee5ng k\u00fd t\u1ef1 \u0111\u1ea1i di\u1ec7n (wildcard certificate) c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 t\u1ea5t c\u1ea3 c\u00e1c t\u00ean mi\u1ec1n con c\u00f9ng c\u1ea5p, nh\u01b0ng n\u00f3 c\u00f3 nh\u1eefng h\u1ea1n ch\u1ebf v\u1ec1 m\u1eb7t c\u1ea5u tr\u00fac ph\u00e2n c\u1ea5p r\u00f5 r\u00e0ng. V\u00ed d\u1ee5, m\u1ed9t gi\u1ea5y t\u1edd ch\u1ee9ng ch\u1ec9 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp \u0111\u1ec3 b\u1ea3o v\u1ec7 m\u1ed9t t\u00ean mi\u1ec1n ch\u00ednh nh\u1ea5t \u0111\u1ecbnh s\u1ebd kh\u00f4ng <code data-no-auto-translation=\"\">*.example.com<\/code> Ch\u1ee9ng ch\u1ec9 n\u00e0y c\u00f3 th\u1ec3 cung c\u1ea5p s\u1ef1 b\u1ea3o v\u1ec7 c\u1ea7n thi\u1ebft. <code data-no-auto-translation=\"\">blog.example.com<\/code> \u548c <code data-no-auto-translation=\"\">shop.example.com<\/code>Nh\u01b0ng n\u00f3 kh\u00f4ng th\u1ec3 b\u1ea3o v\u1ec7 <code data-no-auto-translation=\"\">dev.news.example.com<\/code>(\u0110\u00e2y l\u00e0 m\u1ed9t t\u00ean mi\u1ec1n con c\u1ea5p hai.) N\u1ebfu c\u1ea7n b\u1ea3o v\u1ec7 nhi\u1ec1u t\u00ean mi\u1ec1n con \u1edf c\u00e1c c\u1ea5p \u0111\u1ed9 kh\u00e1c nhau, b\u1ea1n s\u1ebd c\u1ea7n xin c\u1ea5p ch\u1ee9ng ch\u1ec9 ch\u1ee9a t\u00ean c\u1ee5 th\u1ec3 c\u1ee7a c\u00e1c t\u00ean mi\u1ec1n con \u0111\u00f3, ho\u1eb7c s\u1eed d\u1ee5ng lo\u1ea1i ch\u1ee9ng ch\u1ec9 h\u1ed7 tr\u1ee3 c\u00e1c k\u00fd t\u1ef1 \u0111\u1ea1i di\u1ec7n \u0111a c\u1ea5p (nh\u01b0ng \u0111i\u1ec1u n\u00e0y kh\u00f4ng ph\u1ed5 bi\u1ebfn l\u1eafm).<\/p>","protected":false},"excerpt":{"rendered":"<p>SSL ch\u1ee9ng ch\u1ec9 l\u00e0 b\u1eb1ng ch\u1ee9ng s\u1ed1 gi\u00fap b\u1ea3o v\u1ec7 an ninh v\u00e0 x\u00e1c th\u1ef1c danh t\u00ednh c\u1ee7a trang web. B\u00e0i vi\u1ebft n\u00e0y ph\u00e2n t\u00edch chi ti\u1ebft v\u1ec1 vai tr\u00f2 c\u1ed1t l\u00f5i c\u1ee7a SSL ch\u1ee9ng ch\u1ec9, ba lo\u1ea1i ch\u00ednh (DV\/OV\/EV) c\u00f9ng s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 m\u1ee9c \u0111\u1ed9 x\u00e1c th\u1ef1c, gi\u1ea3i th\u00edch nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a giao th\u1ee9c SSL\/TLS k\u1ebft h\u1ee3p gi\u1eefa m\u00e3 h\u00f3a b\u1ea5t \u0111\u1ed1i x\u1ee9ng v\u00e0 m\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng, \u0111\u1ed3ng th\u1eddi cung c\u1ea5p h\u01b0\u1edbng d\u1eabn th\u1ef1c t\u1ebf t\u1eeb qu\u00e1 tr\u00ecnh n\u1ed9p \u0111\u01a1n \u0111\u1ebfn vi\u1ec7c tri\u1ec3n khai, nh\u1eb1m gi\u00fap ng\u01b0\u1eddi d\u00f9ng hi\u1ec3u r\u00f5 v\u00e0 \u00e1p d\u1ee5ng c\u00f4ng ngh\u1ec7 m\u00e3 h\u00f3a cho trang web c\u1ee7a m\u00ecnh m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>","protected":false},"author":7,"featured_media":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"tags":[11,329,394,338,330],"knowledge_category":[277],"class_list":["post-12362367","knowledge_post","type-knowledge_post","status-publish","hentry","tag-ssl-certificate","tag-data-encryption","tag-website-deployment","tag-cybersecurity","tag-certificate-types","knowledge_category-ssl-certificate"],"acf":{"site_seo_keywords":"SSL\u8bc1\u4e66,SSL\u8bc1\u4e66\u7c7b\u578b,HTTPS\u52a0\u5bc6,SSL\u5de5\u4f5c\u539f\u7406,\u8bc1\u4e66\u90e8\u7f72,OV\u8bc1\u4e66,EV\u8bc1\u4e66,SSL\u8bc1\u4e66\u7533\u8bf7\u6307\u5357"},"_links":{"self":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_posts\/12362367","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\/12362367\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/media?parent=12362367"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/tags?post=12362367"},{"taxonomy":"knowledge_category","embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_category?post=12362367"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}