{"id":12366026,"date":"2026-03-13T16:31:17","date_gmt":"2026-03-13T08:31:17","guid":{"rendered":"https:\/\/www.likacloud.com\/knowledge\/ssl%e8%af%81%e4%b9%a6%e6%98%af%e4%bf%9d%e9%9a%9c%e7%bd%91%e7%ab%99%e6%95%b0%e6%8d%ae%e5%9c%a8%e4%ba%92%e8%81%94%e7%bd%91%e4%b8%8a%e5%ae%89%e5%85%a8%e4%bc%a0%e8%be%93%e7%9a%84%e5%9f%ba%e7%9f%b3\/"},"modified":"2026-03-13T17:41:06","modified_gmt":"2026-03-13T09:41:06","slug":"ssl-certificate-secure-website-data-transmission","status":"publish","type":"knowledge_post","link":"https:\/\/www.likacloud.com\/vi\/knowledge\/ssl-certificate\/ssl-certificate-secure-website-data-transmission\/","title":{"rendered":"SSL ch\u1ee9ng ch\u1ec9 l\u00e0 n\u1ec1n t\u1ea3ng \u0111\u1ea3m b\u1ea3o an to\u00e0n cho vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u trang web tr\u00ean internet. N\u00f3 gi\u1ed1ng nh\u01b0 m\u1ed9t chi\u1ebfc ch\u00eca kh\u00f3a"},"content":{"rendered":"<p class=\"wp-block-paragraph\">SSL ch\u1ee9ng ch\u1ec9 l\u00e0 n\u1ec1n t\u1ea3ng quan tr\u1ecdng \u0111\u1ec3 b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u tr\u00ean trang web \u0111\u01b0\u1ee3c truy\u1ec1n t\u1ea3i m\u1ed9t c\u00e1ch an to\u00e0n tr\u00ean Internet. N\u00f3 ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t \u201cch\u00eca kh\u00f3a k\u1ef9 thu\u1eadt s\u1ed1\u201d, m\u00e3 h\u00f3a d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c trao \u0111\u1ed5i gi\u1eefa tr\u00ecnh duy\u1ec7t v\u00e0 m\u00e1y ch\u1ee7, nh\u1eb1m ng\u0103n ch\u1eb7n vi\u1ec7c th\u00f4ng tin nh\u1ea1y c\u1ea3m b\u1ecb c\u00e1c b\u00ean th\u1ee9 ba \u0111\u00e1nh c\u1eafp ho\u1eb7c s\u1eeda \u0111\u1ed5i. Khi trang web c\u1ee7a b\u1ea1n \u0111\u00e3 k\u00edch ho\u1ea1t SSL ch\u1ee9ng ch\u1ec9, bi\u1ec3u t\u01b0\u1ee3ng kh\u00f3a s\u1ebd xu\u1ea5t hi\u1ec7n \u1edf thanh \u0111\u1ecba ch\u1ec9 c\u1ee7a tr\u00ecnh duy\u1ec7t ng\u01b0\u1eddi truy c\u1eadp, v\u00e0 \u0111\u1ecba ch\u1ec9 web th\u01b0\u1eddng b\u1eaft \u0111\u1ea7u b\u1eb1ng \u201cHTTPS\u201d. \u0110i\u1ec1u n\u00e0y g\u1eedi \u0111\u1ebfn ng\u01b0\u1eddi d\u00f9ng t\u00edn hi\u1ec7u r\u1eb1ng trang web \u0111\u00f3 an to\u00e0n v\u00e0 \u0111\u00e1ng tin c\u1eady. \u0110\u1ed1i v\u1edbi b\u1ea5t k\u1ef3 trang web n\u00e0o y\u00eau c\u1ea7u ng\u01b0\u1eddi d\u00f9ng \u0111\u0103ng nh\u1eadp, th\u1ef1c hi\u1ec7n giao d\u1ecbch ho\u1eb7c x\u1eed l\u00fd th\u00f4ng tin c\u00e1 nh\u00e2n, vi\u1ec7c tri\u1ec3n khai SSL ch\u1ee9ng ch\u1ec9 \u0111\u00e3 tr\u1edf th\u00e0nh \u0111i\u1ec1u ki\u1ec7n b\u1eaft bu\u1ed9c, ch\u1ee9 kh\u00f4ng c\u00f2n l\u00e0 t\u00f9y ch\u1ecdn n\u1eefa.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ed1t l\u00f5i 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) thi\u1ebft l\u1eadp m\u1ed9t k\u00eanh truy\u1ec1n th\u00f4ng \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a an to\u00e0n gi\u1eefa m\u00e1y kh\u00e1ch v\u00e0 m\u00e1y ch\u1ee7 th\u00f4ng qua m\u1ed9t qu\u00e1 tr\u00ecnh giao ti\u1ebfp m\u00e3 h\u00f3a ph\u1ee9c t\u1ea1p.<\/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\">To\u00e0n b\u1ed9 qu\u00e1 tr\u00ecnh giao ti\u1ebfp (bao g\u1ed3m c\u1ea3 vi\u1ec7c b\u1eaft tay \u2013 ngh\u0129a l\u00e0 trao \u0111\u1ed5i th\u00f4ng tin) \u0111\u01b0\u1ee3c k\u1ebft h\u1ee3p m\u1ed9t c\u00e1ch kh\u00e9o l\u00e9o gi\u1eefa hai ph\u01b0\u01a1ng th\u1ee9c m\u00e3 h\u00f3a kh\u00e1c nhau. \u1ede giai \u0111o\u1ea1n \u0111\u1ea7u, 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 tr\u00ecnh duy\u1ec7t. Tr\u00ecnh duy\u1ec7t s\u1eed d\u1ee5ng ph\u01b0\u01a1ng th\u1ee9c m\u00e3 h\u00f3a b\u1ea5t \u0111\u1ed1i x\u1ee9ng \u0111\u1ec3 x\u00e1c th\u1ef1c danh t\u00ednh c\u1ee7a m\u00e1y ch\u1ee7, \u0111\u1ed3ng th\u1eddi t\u1ea1o ra m\u1ed9t \u201ckh\u00f3a phi\u00ean\u201d t\u1ea1m th\u1eddi. Kh\u00f3a phi\u00ean n\u00e0y sau \u0111\u00f3 \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a b\u1eb1ng kh\u00f3a c\u00f4ng khai c\u1ee7a m\u00e1y ch\u1ee7 v\u00e0 g\u1eedi tr\u1edf l\u1ea1i cho m\u00e1y ch\u1ee7. M\u00e1y ch\u1ee7 s\u1ebd gi\u1ea3i m\u00e3 kh\u00f3a n\u00e0y b\u1eb1ng kh\u00f3a ri\u00eang c\u1ee7a m\u00ecnh, v\u00e0 t\u1eeb \u0111\u00f3 c\u1ea3 hai b\u00ean \u0111\u1ec1u s\u1ebd c\u00f3 chung m\u1ed9t kh\u00f3a phi\u00ean. T\u1ea5t c\u1ea3 c\u00e1c d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n t\u1ea3i sau \u0111\u00f3 s\u1ebd \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a b\u1eb1ng ph\u01b0\u01a1ng th\u1ee9c m\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y kh\u00f4ng ch\u1ec9 \u0111\u1ea3m b\u1ea3o an to\u00e0n trong qu\u00e1 tr\u00ecnh trao \u0111\u1ed5i kh\u00f3a m\u00e0 c\u00f2n t\u1eadn d\u1ee5ng \u0111\u01b0\u1ee3c \u01b0u \u0111i\u1ec3m v\u1ec1 hi\u1ec7u su\u1ea5t c\u1ee7a ph\u01b0\u01a1ng th\u1ee9c m\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Vai tr\u00f2 c\u1ee7a C\u01a1 quan C\u1ea5p ch\u1ee9ng ch\u1ec9 (Certificate Authority \u2013 CA)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u00ednh kh\u00f3a c\u00f4ng c\u1ea7n \u0111\u01b0\u1ee3c tin t\u01b0\u1edfng, v\u00e0 \u0111\u00f3 ch\u00ednh l\u00e0 tr\u00e1ch nhi\u1ec7m c\u1ee7a c\u00e1c t\u1ed5 ch\u1ee9c c\u1ea5p ch\u1ee9ng ch\u1ec9 (CA \u2013 Certificate Authorities). C\u00e1c t\u1ed5 ch\u1ee9c CA l\u00e0 nh\u1eefng b\u00ean th\u1ee9 ba \u0111\u01b0\u1ee3c to\u00e0n b\u1ed9 c\u00e1c tr\u00ecnh duy\u1ec7t v\u00e0 h\u1ec7 \u0111i\u1ec1u h\u00e0nh tr\u00ean th\u1ebf gi\u1edbi tin t\u01b0\u1edfng. Khi ch\u1ee7 s\u1edf h\u1eefu trang web y\u00eau c\u1ea7u c\u1ea5p ch\u1ee9ng ch\u1ec9 t\u1eeb CA, CA s\u1ebd ki\u1ec3m tra danh t\u00ednh c\u1ee7a h\u1ecd m\u1ed9t c\u00e1ch nghi\u00eam ng\u1eb7t (m\u1ee9c \u0111\u1ed9 ki\u1ec3m tra ph\u1ee5 thu\u1ed9c v\u00e0o lo\u1ea1i ch\u1ee9ng ch\u1ec9). Sau khi ki\u1ec3m tra \u0111\u01b0\u1ee3c th\u00f4ng qua, CA s\u1ebd s\u1eed d\u1ee5ng kh\u00f3a ri\u00eang c\u1ee7a m\u00ecnh \u0111\u1ec3 k\u00fd s\u1ed1 kh\u00f3a c\u00f4ng c\u1ee7a trang web c\u00f9ng v\u1edbi c\u00e1c th\u00f4ng tin li\u00ean quan, t\u1eeb \u0111\u00f3 t\u1ea1o ra ch\u1ee9ng ch\u1ec9 SSL. C\u00e1c tr\u00ecnh duy\u1ec7t \u0111\u01b0\u1ee3c trang b\u1ecb s\u1eb5n m\u1ed9t danh s\u00e1ch c\u00e1c ch\u1ee9ng ch\u1ec9 g\u1ed1c c\u1ee7a c\u00e1c t\u1ed5 ch\u1ee9c CA \u0111\u00e1ng tin c\u1eady, gi\u00fap x\u00e1c minh xem ch\u1eef k\u00fd \u0111\u00f3 c\u00f3 h\u1ee3p l\u1ec7 hay kh\u00f4ng, t\u1eeb \u0111\u00f3 t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho vi\u1ec7c tin t\u01b0\u1edfng v\u00e0o ch\u1ee9ng ch\u1ec9 \u0111\u00f3.<\/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 ch\u00fang<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc s\u1ef1 \u0111a d\u1ea1ng c\u1ee7a c\u00e1c ch\u1ee9ng ch\u1ec9 SSL tr\u00ean th\u1ecb tr\u01b0\u1eddng, vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1c lo\u1ea1i ch\u1ee9ng ch\u1ec9 n\u00e0y s\u1ebd gi\u00fap b\u1ea1n \u0111\u01b0a ra l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p nh\u1ea5t. C\u00e1c ch\u1ee9ng ch\u1ec9 SSL ch\u1ee7 y\u1ebfu kh\u00e1c nhau v\u1ec1 m\u1ee9c \u0111\u1ed9 x\u00e1c th\u1ef1c v\u00e0 ph\u1ea1m vi b\u1ea3o v\u1ec7.<\/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\">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 \u0111\u01b0\u1ee3c c\u1ea5p v\u1edbi t\u1ed1c \u0111\u1ed9 nhanh nh\u1ea5t v\u00e0 chi ph\u00ed th\u1ea5p nh\u1ea5t. CA (Certificate Authority) ch\u1ec9 x\u00e1c minh quy\u1ec1n ki\u1ec3m so\u00e1t t\u00ean mi\u1ec1n c\u1ee7a ng\u01b0\u1eddi n\u1ed9p \u0111\u01a1n, ch\u1eb3ng h\u1ea1n b\u1eb1ng c\u00e1ch g\u1eedi email x\u00e1c th\u1ef1c \u0111\u1ebfn \u0111\u1ecba ch\u1ec9 email \u0111\u00e3 \u0111\u0103ng k\u00fd v\u1edbi t\u00ean mi\u1ec1n, ho\u1eb7c y\u00eau c\u1ea7u \u0111\u1eb7t m\u1ed9t t\u1ec7p tin nh\u1ea5t \u0111\u1ecbnh trong th\u01b0 m\u1ee5c g\u1ed1c c\u1ee7a trang web. DV ch\u1ee9ng ch\u1ec9 kh\u00f4ng x\u00e1c minh t\u00ednh x\u00e1c th\u1ef1c c\u1ee7a t\u1ed5 ch\u1ee9c ho\u1eb7c doanh nghi\u1ec7p.<br \/>\nN\u00f3 r\u1ea5t ph\u00f9 h\u1ee3p cho c\u00e1c blog c\u00e1 nh\u00e2n, trang web tr\u00ecnh b\u00e0y n\u1ed9i dung nh\u1ecf, ho\u1eb7c m\u00f4i tr\u01b0\u1eddng th\u1eed nghi\u1ec7m n\u1ed9i b\u1ed9 c\u1ea7n k\u00edch ho\u1ea1t ch\u1ee9c n\u0103ng HTTPS m\u1ed9t c\u00e1ch nhanh ch\u00f3ng. N\u00f3 cung c\u1ea5p kh\u1ea3 n\u0103ng m\u00e3 h\u00f3a c\u01a1 b\u1ea3n cho trang web, nh\u01b0ng kh\u00f4ng th\u1ec3 x\u00e1c th\u1ef1c danh t\u00ednh c\u1ee7a ng\u01b0\u1eddi truy c\u1eadp.<\/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\">Ch\u1ee9ng ch\u1ec9 OV cung c\u1ea5p m\u1ee9c \u0111\u1ed9 tin c\u1eady cao h\u01a1n so v\u1edbi ch\u1ee9ng ch\u1ec9 DV. C\u01a1 quan c\u1ea5p ch\u1ee9ng ch\u1ec9 (CA \u2013 Certificate Authority) kh\u00f4ng ch\u1ec9 x\u00e1c minh quy\u1ec1n s\u1edf h\u1eefu t\u00ean mi\u1ec1n m\u00e0 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 (c\u00f4ng ty, t\u1ed5 ch\u1ee9c phi l\u1ee3i nhu\u1eadn, v.v.). Qu\u00e1 tr\u00ecnh n\u00e0y bao g\u1ed3m vi\u1ec7c ki\u1ec3m tra th\u00f4ng tin \u0111\u0103ng k\u00fd c\u1ee7a t\u1ed5 ch\u1ee9c \u0111\u00f3 t\u1ea1i c\u00e1c c\u01a1 quan ch\u00ednh ph\u1ee7 ho\u1eb7c c\u00e1c t\u1ed5 ch\u1ee9c \u0111\u0103ng k\u00fd th\u01b0\u01a1ng m\u1ea1i.<br \/>\nVi\u1ec7c n\u1ed9p \u0111\u01a1n xin c\u1ea5p ch\u1ee9ng ch\u1ec9 OV th\u01b0\u1eddng m\u1ea5t v\u00e0i ng\u00e0y l\u00e0m vi\u1ec7c. Sau khi ch\u1ee9ng ch\u1ec9 \u0111\u01b0\u1ee3c c\u1ea5p, th\u00f4ng tin chi ti\u1ebft v\u1ec1 t\u1ed5 ch\u1ee9c \u0111\u00f3 (bao g\u1ed3m t\u00ean t\u1ed5 ch\u1ee9c \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c minh) s\u1ebd \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb trong c\u00e1c t\u00e0i li\u1ec7u li\u00ean quan \u0111\u1ebfn ch\u1ee9ng ch\u1ec9. Ch\u1ee9ng ch\u1ec9 OV ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c trang web c\u1ee7a doanh nghi\u1ec7p, n\u1ec1n t\u1ea3ng th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed, v\u00e0 nh\u1eefng trang web kh\u00e1c c\u1ea7n th\u1ec3 hi\u1ec7n t\u00ednh x\u00e1c th\u1ef1c<\/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\">EV (Extended Validation) ch\u1ee9ng ch\u1ec9 l\u00e0 lo\u1ea1i ch\u1ee9ng ch\u1ec9 SSL c\u00f3 quy tr\u00ecnh x\u00e1c th\u1ef1c nghi\u00eam ng\u1eb7t nh\u1ea5t v\u00e0 \u0111\u1ed9 tin c\u1eady cao nh\u1ea5t. Ngo\u00e0i vi\u1ec7c th\u1ef1c hi\u1ec7n t\u1ea5t c\u1ea3 c\u00e1c b\u01b0\u1edbc x\u00e1c th\u1ef1c c\u1ea7n thi\u1ebft c\u1ee7a ch\u1ee9ng ch\u1ec9 OV, t\u1ed5 ch\u1ee9c cung c\u1ea5p ch\u1ee9ng ch\u1ec9 (CA \u2013 Certificate Authority) c\u00f2n ti\u1ebfn h\u00e0nh ki\u1ec3m tra tr\u1ef1c ti\u1ebfp t\u1ea1i \u0111\u1ecba \u0111i\u1ec3m \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh ch\u00ednh x\u00e1c v\u1ec1 t\u00ecnh tr\u1ea1ng ph\u00e1p l\u00fd, v\u1eadt l\u00fd v\u00e0 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a t\u1ed5 ch\u1ee9c \u0111\u00f3<br \/>\nTrong c\u00e1c tr\u00ecnh duy\u1ec7t, c\u00e1ch hi\u1ec3n th\u1ecb ch\u1ee9ng ch\u1ec9 EV (Electric Vehicle Certificate) r\u1ea5t n\u1ed5i b\u1eadt: \u1ede h\u1ea7u h\u1ebft c\u00e1c tr\u00ecnh duy\u1ec7t, thanh \u0111\u1ecba ch\u1ec9 kh\u00f4ng ch\u1ec9 hi\u1ec3n th\u1ecb bi\u1ec3u t\u01b0\u1ee3ng kh\u00f3a m\u00e0 c\u00f2n tr\u1ef1c ti\u1ebfp hi\u1ec3n th\u1ecb t\u00ean c\u00f4ng ty \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c th\u1ef1c, th\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u00f4 \u0111\u1eadm m\u00e0u xanh l\u00e1. \u0110i\u1ec1u n\u00e0y gi\u00fap t\u0103ng \u0111\u00e1ng k\u1ec3 c\u1ea3m gi\u00e1c an to\u00e0n v\u00e0 s\u1ef1 tin t\u01b0\u1edfng c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, v\u00e0 ch\u00ednh l\u00e0 l\u1ef1a ch\u1ecdn h\u00e0ng \u0111\u1ea7u trong c\u00e1c l\u0129nh v\u1ef1c t\u00e0i ch\u00ednh, ng\u00e2n h\u00e0ng, th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed l\u1edbn, v.v.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ch\u1ee9ng ch\u1ec9 ch\u1ee9a k\u00fd t\u1ef1 \u0111\u1ea1i di\u1ec7n (wildcard certificate) v\u00e0 ch\u1ee9ng ch\u1ec9 cho nhi\u1ec1u t\u00ean mi\u1ec1n (multi-domain certificate)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">X\u00e9t v\u1ec1 ph\u1ea1m vi b\u1ea3o v\u1ec7, ch\u1ee9ng ch\u1ec9 ch\u1ee9a k\u00fd t\u1ef1 \u0111\u1ea1i di\u1ec7n (wildcard certificate) 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 c\u1ee7a n\u00f3 (v\u00ed d\u1ee5: <code data-no-auto-translation=\"\">*.example.com<\/code> C\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 <code data-no-auto-translation=\"\">blog.example.com<\/code>\u3001<code data-no-auto-translation=\"\">shop.example.com<\/code> Vi\u1ec7c qu\u1ea3n l\u00fd tr\u1edf n\u00ean r\u1ea5t thu\u1eadn ti\u1ec7n.<br \/>\nCh\u1ee9ng ch\u1ec9 \u0111a t\u00ean mi\u1ec1n (SAN \u2013 Subject Alternative Name) cho ph\u00e9p b\u1ea1n th\u00eam nhi\u1ec1u t\u00ean mi\u1ec1n ho\u00e0n to\u00e0n kh\u00e1c nhau v\u00e0o c\u00f9ng m\u1ed9t ch\u1ee9ng ch\u1ec9. V\u00ed d\u1ee5: <code data-no-auto-translation=\"\">example.com<\/code>\u3001<code data-no-auto-translation=\"\">example.net<\/code>\u3001<code data-no-auto-translation=\"\">anotherexample.org<\/code>\u0110i\u1ec1u n\u00e0y mang l\u1ea1i s\u1ef1 linh ho\u1ea1t v\u00e0 l\u1ee3i th\u1ebf v\u1ec1 chi ph\u00ed cho c\u00e1c doanh nghi\u1ec7p qu\u1ea3n l\u00fd nhi\u1ec1u t\u00ean mi\u1ec1n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quy tr\u00ecnh \u0111\u1ea7y \u0111\u1ee7 \u0111\u1ec3 tri\u1ec3n khai ch\u1ee9ng ch\u1ec9 SSL<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 tri\u1ec3n khai th\u00e0nh c\u00f4ng m\u1ed9t ch\u1ee9ng ch\u1ec9 SSL, c\u1ea7n th\u1ef1c hi\u1ec7n m\u1ed9t lo\u1ea1t c\u00e1c b\u01b0\u1edbc t\u1eeb vi\u1ec7c t\u1ea1o c\u1eb7p kh\u00f3a \u0111\u1ebfn c\u1ea5u h\u00ecnh tr\u00ean m\u00e1y ch\u1ee7.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc 1: T\u1ea1o Y\u00eau c\u1ea7u K\u00fd 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 c\u1eb7p kh\u00f3a (kh\u00f3a ri\u00eang v\u00e0 kh\u00f3a c\u00f4ng) tr\u00ean m\u00e1y ch\u1ee7. Kh\u00f3a ri\u00eang ph\u1ea3i \u0111\u01b0\u1ee3c b\u1ea3o m\u1eadt m\u1ed9t c\u00e1ch nghi\u00eam ng\u1eb7t v\u00e0 l\u01b0u tr\u1eef \u1edf n\u01a1i an to\u00e0n tr\u00ean m\u00e1y ch\u1ee7. Sau \u0111\u00f3, s\u1eed d\u1ee5ng kh\u00f3a ri\u00eang \u0111\u1ec3 t\u1ea1o m\u1ed9t t\u1ec7p CSR (Certificate Signing Request). T\u1ec7p CSR ch\u1ee9a kh\u00f3a c\u00f4ng c\u1ee7a b\u1ea1n, t\u00ean mi\u1ec1n b\u1ea1n mu\u1ed1n \u0111\u0103ng k\u00fd, c\u00f9ng v\u1edbi th\u00f4ng tin v\u1ec1 t\u1ed5 ch\u1ee9c c\u1ee7a b\u1ea1n (\u0111\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i ch\u1ee9ng ch\u1ec9 OV\/EV). T\u1ec7p CSR n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c g\u1eedi \u0111\u1ebfn t\u1ed5 ch\u1ee9c c\u1ea5p ch\u1ee9ng ch\u1ec9 (CA \u2013 Certificate Authority) m\u00e0 b\u1ea1n \u0111\u00e3 ch\u1ecdn.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc hai: N\u1ed9p \u0111\u01a1n v\u00e0 x\u00e1c minh cho CA<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e3y n\u1ed9p \u0111\u01a1n y\u00eau c\u1ea7u c\u1ea5p ch\u1ee9ng ch\u1ec9 (CSR \u2013 Certificate Signing Request) \u0111\u1ebfn nh\u00e0 cung c\u1ea5p ch\u1ee9ng ch\u1ec9, v\u00e0 ch\u1ecdn lo\u1ea1i ch\u1ee9ng ch\u1ec9 m\u00e0 b\u1ea1n c\u1ea7n (DV, OV ho\u1eb7c EV). T\u00f9y theo lo\u1ea1i ch\u1ee9ng ch\u1ec9, b\u1ea1n s\u1ebd ph\u1ea3i th\u1ef1c hi\u1ec7n c\u00e1c quy tr\u00ecnh x\u00e1c th\u1ef1c t\u01b0\u01a1ng \u1ee9ng. \u0110\u1ed1i v\u1edbi ch\u1ee9ng ch\u1ec9 DV, qu\u00e1 tr\u00ecnh x\u00e1c th\u1ef1c th\u01b0\u1eddng m\u1ea5t t\u1eeb v\u00e0i ph\u00fat \u0111\u1ebfn v\u00e0i gi\u1edd. Trong khi \u0111\u00f3, ch\u1ee9ng ch\u1ec9 OV\/EV c\u1ea7n th\u1eddi gian d\u00e0i h\u01a1n \u0111\u1ec3 \u0111\u01b0\u1ee3c xem x\u00e9t b\u1edfi nh\u00e2n vi\u00ean chuy\u00ean m\u00f4n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc th\u1ee9 ba: T\u1ea3i xu\u1ed1ng v\u00e0 c\u00e0i \u0111\u1eb7t ch\u1ee9ng ch\u1ec9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sau khi qu\u00e1 tr\u00ecnh x\u00e1c th\u1ef1c \u0111\u01b0\u1ee3c ho\u00e0n t\u1ea5t 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 m\u1ed9t\u2026)<code data-no-auto-translation=\"\">.crt<\/code>\u6216<code data-no-auto-translation=\"\">.pem<\/code>B\u1ea1n c\u1ea7n l\u1ea5y c\u00e1c t\u1ec7p ch\u1ee9ng ch\u1ec9 (bao g\u1ed3m c\u1ea3 chu\u1ed7i ch\u1ee9ng ch\u1ec9 trung gian n\u1ebfu c\u00f3) v\u00e0 t\u1ec7p kh\u00f3a ri\u00eang (private key) \u0111\u00e3 \u0111\u01b0\u1ee3c t\u1ea1o ra ban \u0111\u1ea7u, sau \u0111\u00f3 t\u1ea3i ch\u00fang l\u00ean m\u00e1y ch\u1ee7. C\u00e1ch c\u00e0i \u0111\u1eb7t c\u1ee5 th\u1ec3 s\u1ebd kh\u00e1c nhau t\u00f9y theo ph\u1ea7n m\u1ec1m m\u00e1y ch\u1ee7 m\u00e0 b\u1ea1n \u0111ang s\u1eed d\u1ee5ng \u2013 v\u00ed d\u1ee5 nh\u01b0 Nginx, Apache, IIS, v.v. M\u1ed7i ph\u1ea7n m\u1ec1m \u0111\u1ec1u y\u00eau c\u1ea7u b\u1ea1n ch\u1ec9nh s\u1eeda c\u00e1c t\u1ec7p c\u1ea5u h\u00ecnh \u0111\u1ec3 ch\u1ec9 \u0111\u1ecbnh \u0111\u01b0\u1eddng d\u1eabn \u0111\u1ebfn t\u1ec7p ch\u1ee9ng ch\u1ec9 v\u00e0 kh\u00f3a ri\u00eang.<\/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\">B\u01b0\u1edbc th\u1ee9 t\u01b0: C\u1ea5u h\u00ecnh v\u00e0 thi\u1ebft l\u1eadp chuy\u1ec3n h\u01b0\u1edbng t\u1ef1 \u0111\u1ed9ng sang giao th\u1ee9c HTTPS<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sau khi c\u00e0i \u0111\u1eb7t xong, b\u1ea1n c\u1ea7n ki\u1ec3m tra xem ch\u1ee9ng ch\u1ec9 c\u00f3 ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng hay kh\u00f4ng. B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 ki\u1ec3m tra SSL tr\u1ef1c tuy\u1ebfn \u0111\u1ec3 th\u1ef1c hi\u1ec7n vi\u1ec7c n\u00e0y. \u0110\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng to\u00e0n b\u1ed9 l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp \u0111\u1ec1u \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a, ch\u00fang t\u00f4i khuy\u00ean m\u1ea1nh m\u1ebd b\u1ea1n n\u00ean thi\u1ebft l\u1eadp quy t\u1eafc chuy\u1ec3n h\u01b0\u1edbng t\u1ef1 \u0111\u1ed9ng sang giao th\u1ee9c HTTPS trong c\u1ea5u h\u00ecnh m\u00e1y ch\u1ee7 web, sao cho m\u1ecdi y\u00eau c\u1ea7u \u0111\u1ebfn t\u1eeb giao th\u1ee9c HTTP \u0111\u1ec1u \u0111\u01b0\u1ee3c t\u1ef1 \u0111\u1ed9ng chuy\u1ec3n h\u01b0\u1edbng sang \u0111\u1ecba ch\u1ec9 HTTPS.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">B\u1ea3o tr\u00ec v\u00e0 qu\u1ea3n l\u00fd ch\u1ee9ng ch\u1ec9 SSL<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c tri\u1ec3n khai c\u00e1c ch\u1ee9ng ch\u1ec9 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t l\u1ea7n l\u00e0m xong v\u00e0 m\u00e3i kh\u00f4ng c\u1ea7n quan t\u00e2m n\u1eefa; vi\u1ec7c qu\u1ea3n l\u00fd ch\u00fang m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an ninh l\u00e2u d\u00e0i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">H\u1ea1n s\u1eed d\u1ee5ng ch\u1ee9ng ch\u1ec9 v\u00e0 vi\u1ec7c gia h\u1ea1n ch\u1ee9ng ch\u1ec9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">K\u1ec3 t\u1eeb khi Apple, Google v\u00e0 c\u00e1c c\u00f4ng ty kh\u00e1c th\u00fac \u0111\u1ea9y vi\u1ec7c n\u00e0y, th\u1eddi h\u1ea1n s\u1eed d\u1ee5ng c\u1ee7a c\u00e1c ch\u1ee9ng ch\u1ec9 SSL do c\u00e1c t\u1ed5 ch\u1ee9c ch\u1ee9ng nh\u1eadn ch\u00ednh (CA) c\u1ea5p \u0111\u00e3 \u0111\u01b0\u1ee3c r\u00fat ng\u1eafn xu\u1ed1ng c\u00f2n t\u1ed1i \u0111a 398 ng\u00e0y (kho\u1ea3ng 13 th\u00e1ng). \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 b\u1ea1n c\u1ea7n ph\u1ea3i gia h\u1ea1n ch\u1ee9ng ch\u1ec9 \u0111\u1ecbnh k\u1ef3. H\u00e3y lu\u00f4n theo d\u00f5i ng\u00e0y h\u1ebft h\u1ea1n c\u1ee7a ch\u1ee9ng ch\u1ec9 v\u00e0 khuy\u1ebfn ngh\u1ecb b\u1eaft \u0111\u1ea7u qu\u00e1 tr\u00ecnh gia h\u1ea1n \u00edt nh\u1ea5t m\u1ed9t th\u00e1ng tr\u01b0\u1edbc khi ch\u00fang h\u1ebft h\u1ea1n. Nhi\u1ec1u nh\u00e0 cung c\u1ea5p ch\u1ee9ng ch\u1ec9 h\u1ed7 tr\u1ee3 t\u00ednh n\u0103ng gia h\u1ea1n t\u1ef1 \u0111\u1ed9ng, gi\u00fap tr\u00e1nh t\u00ecnh tr\u1ea1ng trang web kh\u00f4ng th\u1ec3 truy c\u1eadp do ch\u1ee9ng ch\u1ec9 h\u1ebft h\u1ea1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Gi\u00e1m s\u00e1t v\u00e0 thay th\u1ebf<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c thi\u1ebft l\u1eadp c\u01a1 ch\u1ebf gi\u00e1m s\u00e1t c\u00e1c ch\u1ee9ng ch\u1ec9 l\u00e0 \u0111i\u1ec1u v\u00f4 c\u00f9ng quan tr\u1ecdng. B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng nhi\u1ec1u d\u1ecbch v\u1ee5 gi\u00e1m s\u00e1t mi\u1ec5n ph\u00ed ho\u1eb7c c\u00f3 ph\u00ed \u0111\u1ec3 nh\u1eadn c\u1ea3nh b\u00e1o qua email, tin nh\u1eafn v\u0103n b\u1ea3n, v.v. tr\u01b0\u1edbc khi ch\u1ee9ng ch\u1ec9 h\u1ebft h\u1ea1n. Khi ph\u00e1t hi\u1ec7n r\u1eb1ng kh\u00f3a ri\u00eang c\u00f3 th\u1ec3 b\u1ecb r\u00f2 r\u1ec9, ho\u1eb7c th\u00f4ng tin t\u00ean mi\u1ec1n, th\u00f4ng tin t\u1ed5 ch\u1ee9c thay \u0111\u1ed5i, b\u1ea1n c\u1ea7n ngay l\u1eadp t\u1ee9c h\u1ee7y ch\u1ee9ng ch\u1ec9 c\u0169 v\u00e0 y\u00eau c\u1ea7u c\u1ea5p ch\u1ee9ng ch\u1ec9 m\u1edbi.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u1ea5u h\u00ecnh hi\u1ec7u n\u0103ng v\u00e0 b\u1ea3o m\u1eadt<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Qu\u00e1 tr\u00ecnh k\u1ebft n\u1ed1i SSL\/TLS s\u1ebd ti\u00eau t\u1ed1n m\u1ed9t l\u01b0\u1ee3ng t\u00e0i nguy\u00ean t\u00ednh to\u00e1n nh\u1ea5t \u0111\u1ecbnh, nh\u01b0ng t\u00e1c \u0111\u1ed9ng n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3m thi\u1ec3u th\u00f4ng qua vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a. Vi\u1ec7c k\u00edch ho\u1ea1t giao th\u1ee9c TLS 1.3 c\u00f3 th\u1ec3 gi\u00fap t\u0103ng \u0111\u00e1ng k\u1ec3 t\u1ed1c \u0111\u1ed9 k\u1ebft n\u1ed1i. \u0110\u1ed3ng th\u1eddi, c\u1ea7n \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u1ea5u h\u00ecnh m\u00e1y ch\u1ee7 \u0111\u00e3 v\u00f4 hi\u1ec7u h\u00f3a c\u00e1c giao th\u1ee9c l\u1ed7i th\u1eddi ho\u1eb7c kh\u00f4ng an to\u00e0n (nh\u01b0 SSL 2.0\/3.0, TLS 1.0\/1.1) c\u0169ng nh\u01b0 c\u00e1c b\u1ed9 m\u00e3 h\u00f3a y\u1ebfu. N\u00ean ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 \u0111i\u1ec3m s\u1ed1 b\u1ea3o m\u1eadt c\u1ee7a c\u1ea5u h\u00ecnh SSL tr\u00ean m\u00e1y ch\u1ee7 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng n\u00f3 tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n b\u1ea3o m\u1eadt m\u1edbi nh\u1ea5t.<\/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 l\u00e0 c\u00f4ng c\u1ee5 k\u1ef9 thu\u1eadt s\u1ed1 kh\u00f4ng th\u1ec3 thi\u1ebfu \u0111\u1ec3 th\u1ef1c hi\u1ec7n vi\u1ec7c m\u00e3 h\u00f3a d\u1eef li\u1ec7u tr\u00ean c\u00e1c trang web s\u1eed d\u1ee5ng giao th\u1ee9c HTTPS v\u00e0 x\u00e2y d\u1ef1ng m\u1ed9t m\u00f4i tr\u01b0\u1eddng truy\u1ec1n th\u00f4ng an to\u00e0n, \u0111\u00e1ng tin c\u1eady. T\u1eeb c\u00e1c ch\u1ee9ng ch\u1ec9 DV c\u01a1 b\u1ea3n \u0111\u1ebfn c\u00e1c ch\u1ee9ng ch\u1ec9 EV c\u00f3 m\u1ee9c \u0111\u1ed9 tin c\u1eady cao, m\u1ed7i lo\u1ea1i \u0111\u1ec1u \u0111\u00e1p \u1ee9ng nh\u1eefng y\u00eau c\u1ea7u b\u1ea3o m\u1eadt v\u00e0 x\u00e1c th\u1ef1c kh\u00e1c nhau. Vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ch\u00fang, l\u1ef1a ch\u1ecdn lo\u1ea1i ch\u1ee9ng ch\u1ec9 ph\u00f9 h\u1ee3p, c\u0169ng nh\u01b0 tri\u1ec3n khai v\u00e0 b\u1ea3o tr\u00ec ch\u00fang theo quy tr\u00ecnh nghi\u00eam ng\u1eb7t l\u00e0 nh\u1eefng k\u1ef9 n\u0103ng c\u01a1 b\u1ea3n m\u00e0 m\u1ecdi ch\u1ee7 s\u1edf h\u1eefu trang web v\u00e0 nh\u00e2n vi\u00ean v\u1eadn h\u00e0nh \u0111\u1ec1u c\u1ea7n n\u1eafm v\u1eefng. SSL kh\u00f4ng ch\u1ec9 b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u ng\u01b0\u1eddi d\u00f9ng kh\u1ecfi s\u1ef1 theo d\u00f5i tr\u00e1i ph\u00e9p m\u00e0 c\u00f2n gi\u00fap n\u00e2ng cao h\u00ecnh \u1ea3nh chuy\u00ean nghi\u1ec7p c\u1ee7a trang web, t\u0103ng s\u1ef1 tin t\u01b0\u1edfng t\u1eeb ng\u01b0\u1eddi d\u00f9ng, v\u00e0 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u x\u1ebfp h\u1ea1ng tr\u00ean c\u00e1c c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm. Trong m\u00f4i tr\u01b0\u1eddng m\u1ea1ng v\u00e0o n\u0103m 2026, nh\u1eefng trang web kh\u00f4ng s\u1eed d\u1ee5ng giao th\u1ee9c HTTPS s\u1ebd ng\u00e0y c\u00e0ng kh\u00f3 c\u00f3 th\u1ec3 gi\u00e0nh \u0111\u01b0\u1ee3c s\u1ef1 tin t\u01b0\u1edfng t\u1eeb ng\u01b0\u1eddi d\u00f9ng v\u00e0 c\u00e1c n\u1ec1n t\u1ea3ng l\u1edbn.<\/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\">M\u1ed1i quan h\u1ec7 gi\u1eefa ch\u1ee9ng ch\u1ec9 SSL v\u00e0 HTTPS l\u00e0 g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">SSL ch\u1ee9ng ch\u1ec9 l\u00e0 n\u1ec1n t\u1ea3ng k\u1ef9 thu\u1eadt \u0111\u1ec3 tri\u1ec3n khai giao th\u1ee9c HTTPS. Khi b\u1ea1n c\u00e0i \u0111\u1eb7t m\u1ed9t ch\u1ee9ng ch\u1ec9 SSL h\u1ee3p l\u1ec7 cho trang web c\u1ee7a m\u00ecnh, m\u00e1y ch\u1ee7 c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i HTTPS \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a v\u00e0 x\u00e1c th\u1ef1c v\u1edbi tr\u00ecnh duy\u1ec7t c\u1ee7a ng\u01b0\u1eddi d\u00f9ng. N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, ch\u1ee9ng ch\u1ec9 gi\u1ed1ng nh\u01b0 \u201cch\u1ee9ng minh th\u01b0 c\u00e1 nh\u00e2n\u201d, c\u00f2n HTTPS ch\u00ednh l\u00e0 \u201cquy t\u1eafc\u201d \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c cu\u1ed9c trao \u0111\u1ed5i th\u00f4ng tin m\u1ed9t c\u00e1ch an to\u00e0n d\u1ef1a tr\u00ean ch\u1ee9ng ch\u1ec9 \u0111\u00f3.<\/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\u80fd\u6ee1\u8db3\u57fa\u7840\u7684\u52a0\u5bc6\u9700\u6c42\uff0c\u6709\u6548\u671f\u8f83\u77ed\uff0890\u5929\uff09\uff0c\u9700\u8981\u9891\u7e41\u81ea\u52a8\u7eed\u7b7e\u3002\u4ed8\u8d39\u8bc1\u4e66\u5219\u63d0\u4f9b\u4e86\u66f4\u5e7f\u6cdb\u7684\u9009\u62e9\uff0c\u5305\u62ecOV\u3001EV\u8bc1\u4e66\uff0c\u4ee5\u53ca\u66f4\u957f\u7684\u53ef\u9009\u6709\u6548\u671f\uff08\u5982398\u5929\uff09\u3001\u66f4\u5b8c\u5584\u7684\u4fdd\u9669\u8d54\u4ed8\u3001\u4ee5\u53ca\u4e13\u4e1a\u7684\u6280\u672f\u652f\u6301\u670d\u52a1\u3002\u5bf9\u4e8e\u5546\u4e1a\u7f51\u7ad9\uff0c\u4ed8\u8d39\u8bc1\u4e66\u63d0\u4f9b\u7684\u989d\u5916\u9a8c\u8bc1\u548c\u529f\u80fd\u66f4\u4e3a\u91cd\u8981\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 thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i b\u1ea3o m\u1eadt b\u1eb1ng SSL\/TLS th\u1ef1c s\u1ef1 s\u1ebd t\u1ea1o ra m\u1ed9t kho\u1ea3ng th\u1eddi gian ch\u1edd \u0111\u1ee3i nh\u1ecf, nh\u01b0ng giao th\u1ee9c TLS 1.3 hi\u1ec7n \u0111\u1ea1i \u0111\u00e3 gi\u00fap t\u1ed1i \u01b0u h\u00f3a \u0111\u00e1ng k\u1ec3 qu\u00e1 tr\u00ecnh n\u00e0y. Ngo\u00e0i ra, nh\u1edd v\u00e0o c\u00e1c t\u00ednh n\u0103ng nh\u01b0 \u0111a lu\u1ed3ng (multiplexing) c\u1ee7a giao th\u1ee9c HTTP\/2 (th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng c\u00f9ng v\u1edbi HTTPS), t\u1ed1c \u0111\u1ed9 t\u1ea3i trang c\u1ee7a c\u00e1c trang web \u0111\u01b0\u1ee3c b\u1ea3o m\u1eadt th\u01b0\u1eddng nhanh h\u01a1n so v\u1edbi c\u00e1c trang web s\u1eed d\u1ee5ng HTTP kh\u00f4ng \u0111\u01b0\u1ee3c b\u1ea3o m\u1eadt. Do \u0111\u00f3, v\u1edbi c\u1ea5u h\u00ecnh h\u1ee3p l\u00fd, vi\u1ec7c tri\u1ec3n khai ch\u1ee9ng ch\u1ec9 SSL g\u1ea7n nh\u01b0 kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 truy c\u1eadp, th\u1eadm ch\u00ed c\u00f2n c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh ch\u1ee9ng ch\u1ec9 SSL c\u1ee7a m\u1ed9t trang web c\u00f3 an to\u00e0n v\u00e0 hi\u1ec7u l\u1ef1c hay kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 nhanh ch\u00f3ng x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 an to\u00e0n c\u1ee7a m\u1ed9t trang web b\u1eb1ng c\u00e1ch ki\u1ec3m tra thanh \u0111\u1ecba ch\u1ec9 tr\u00ecnh duy\u1ec7t. C\u00e1c trang web s\u1eed d\u1ee5ng giao th\u1ee9c HTTPS an to\u00e0n s\u1ebd hi\u1ec3n th\u1ecb bi\u1ec3u t\u01b0\u1ee3ng kh\u00f3a. B\u1ea1n c\u00f3 th\u1ec3 nh\u1ea5p v\u00e0o bi\u1ec3u t\u01b0\u1ee3ng kh\u00f3a n\u00e0y \u0111\u1ec3 xem chi ti\u1ebft ch\u1ee9ng ch\u1ec9 s\u1ed1, x\u00e1c nh\u1eadn r\u1eb1ng ch\u1ee9ng ch\u1ec9 \u0111\u01b0\u1ee3c c\u1ea5p b\u1edfi m\u1ed9t t\u1ed5 ch\u1ee9c \u0111\u00e1ng tin c\u1eady, v\u00e0 t\u00ean \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb tr\u00ean ch\u1ee9ng ch\u1ec9 ph\u1ea3i tr\u00f9ng v\u1edbi t\u00ean mi\u1ec1n c\u1ee7a trang web \u0111ang \u0111\u01b0\u1ee3c truy c\u1eadp. N\u1ebfu b\u1ea1n nh\u00ecn th\u1ea5y c\u1ea3nh b\u00e1o \u201ckh\u00f4ng an to\u00e0n\u201d ho\u1eb7c th\u00f4ng b\u00e1o l\u1ed7i li\u00ean quan \u0111\u1ebfn ch\u1ee9ng ch\u1ec9, b\u1ea1n n\u00ean c\u1ea9n th\u1eadn khi s\u1eed d\u1ee5ng trang web \u0111\u00f3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">M\u1ed9t ch\u1ee9ng ch\u1ec9 SSL c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng cho nhi\u1ec1u m\u00e1y ch\u1ee7 kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u00f4ng th\u01b0\u1eddng l\u00e0 c\u00f3 th\u1ec3. Mi\u1ec5n l\u00e0 c\u00e1c m\u00e1y ch\u1ee7 \u0111ang ch\u1ea1y c\u00f9ng m\u1ed9t t\u00ean mi\u1ec1n ho\u1eb7c thu\u1ed9c danh s\u00e1ch c\u00e1c t\u00ean mi\u1ec1n \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1edfi c\u00f9ng m\u1ed9t ch\u1ee9ng ch\u1ec9, b\u1ea1n c\u00f3 th\u1ec3 c\u00e0i \u0111\u1eb7t c\u00f9ng m\u1ed9t t\u1ec7p ch\u1ee9ng ch\u1ec9 (c\u00f9ng v\u1edbi kh\u00f3a ri\u00eang t\u01b0\u01a1ng \u1ee9ng) tr\u00ean nhi\u1ec1u m\u00e1y ch\u1ee7 kh\u00e1c nhau (v\u00ed d\u1ee5: c\u00e1c m\u00e1y ch\u1ee7 Web \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00f4ng t\u00e1c ph\u00e2n ph\u1ed1i t\u1ea3i). Tuy nhi\u00ean, c\u1ea7n l\u01b0u \u00fd r\u1eb1ng qu\u00e1 tr\u00ecnh sao ch\u00e9p v\u00e0 ph\u00e2n ph\u1ed1i kh\u00f3a ri\u00eang ph\u1ea3i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n m\u1ed9t c\u00e1ch an to\u00e0n \u0111\u1ec3 tr\u00e1nh r\u00f2 r\u1ec9 th\u00f4ng tin m\u1eadt.<\/p>","protected":false},"excerpt":{"rendered":"<p>SSL ch\u1ee9ng ch\u1ec9 m\u00e3 h\u00f3a d\u1eef li\u1ec7u truy\u1ec1n gi\u1eefa tr\u00ecnh duy\u1ec7t v\u00e0 m\u00e1y ch\u1ee7, \u0111\u1ea3m b\u1ea3o an to\u00e0n th\u00f4ng tin. C\u1ed1t l\u00f5i c\u1ee7a n\u00f3 k\u1ebft h\u1ee3p m\u00e3 h\u00f3a b\u1ea5t \u0111\u1ed1i x\u1ee9ng v\u00e0 \u0111\u1ed1i x\u1ee9ng, v\u00e0 \u0111\u01b0\u1ee3c c\u1ea5p b\u1edfi CA \u0111\u00e1ng tin c\u1eady. B\u00e0i vi\u1ebft h\u1ec7 th\u1ed1ng gi\u1edbi thi\u1ec7u s\u1ef1 kh\u00e1c bi\u1ec7t v\u00e0 c\u00e1c t\u00ecnh hu\u1ed1ng \u00e1p d\u1ee5ng c\u1ee7a c\u00e1c lo\u1ea1i ch\u1ee9ng ch\u1ec9 ch\u00ednh nh\u01b0 DV, OV, EV, \u0111\u1ed3ng th\u1eddi cung c\u1ea5p h\u01b0\u1edbng d\u1eabn tri\u1ec3n khai \u0111\u1ea7y \u0111\u1ee7 t\u1eeb t\u1ea1o CSR \u0111\u1ebfn c\u00e0i \u0111\u1eb7t c\u1ea5u h\u00ecnh.<\/p>","protected":false},"author":7,"featured_media":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"tags":[],"knowledge_category":[277],"class_list":["post-12366026","knowledge_post","type-knowledge_post","status-publish","hentry","knowledge_category-ssl-certificate"],"acf":{"site_seo_keywords":"SSL\u8bc1\u4e66,HTTPS\u52a0\u5bc6,\u7f51\u7ad9\u5b89\u5168,\u8bc1\u4e66\u7c7b\u578b,\u90e8\u7f72\u6d41\u7a0b,CA\u9881\u53d1\u673a\u6784,SSL\u8bc1\u4e66\u5de5\u4f5c\u539f\u7406,SSL\u8bc1\u4e66\u600e\u4e48\u5b89\u88c5"},"_links":{"self":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_posts\/12366026","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\/12366026\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/media?parent=12366026"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/tags?post=12366026"},{"taxonomy":"knowledge_category","embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_category?post=12366026"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}