{"id":12367988,"date":"2026-03-14T09:59:21","date_gmt":"2026-03-14T01:59:21","guid":{"rendered":"https:\/\/www.likacloud.com\/knowledge\/ssl%e8%af%81%e4%b9%a6%e5%ae%8c%e6%95%b4%e6%8c%87%e5%8d%97%ef%bc%9a%e4%bb%8e%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86%e5%88%b0%e5%85%8d%e8%b4%b9%e4%b8%8e%e4%bb%98%e8%b4%b9%e7%94%b3%e8%af%b7%e6%b5%81\/"},"modified":"2026-03-14T10:06:36","modified_gmt":"2026-03-14T02:06:36","slug":"ssl-certificate-guide-how-it-works-free-paid-application-process","status":"publish","type":"knowledge_post","link":"https:\/\/www.likacloud.com\/vi\/knowledge\/ssl-certificate\/ssl-certificate-guide-how-it-works-free-paid-application-process\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n v\u1ec1 SSL Certificate: T\u1eeb nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng \u0111\u1ebfn chi ti\u1ebft quy tr\u00ecnh xin c\u1ea5p mi\u1ec5n ph\u00ed v\u00e0 tr\u1ea3 ph\u00ed"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Trong m\u00f4i tr\u01b0\u1eddng internet ng\u00e0y nay, b\u1ea3o m\u1eadt d\u1eef li\u1ec7u l\u00e0 n\u1ec1n t\u1ea3ng c\u01a1 b\u1ea3n cho ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e1c trang web. Ch\u1ee9ng ch\u1ec9 SSL, v\u1edbi vai tr\u00f2 l\u00e0 c\u00f4ng ngh\u1ec7 c\u1ed1t l\u00f5i \u0111\u1ec3 th\u1ef1c hi\u1ec7n vi\u1ec7c m\u00e3 h\u00f3a th\u00f4ng tin qua giao th\u1ee9c HTTPS, \u0111\u00e3 chuy\u1ec3n t\u1eeb m\u1ed9t t\u00ednh n\u0103ng t\u00f9y ch\u1ecdn th\u00e0nh y\u00eau c\u1ea7u b\u1eaft bu\u1ed9c \u0111\u1ed1i v\u1edbi b\u1ea3o m\u1eadt v\u00e0 uy t\u00edn c\u1ee7a trang web. SSL kh\u00f4ng ch\u1ec9 l\u00e0 c\u00f4ng c\u1ee5 quan tr\u1ecdng \u0111\u1ec3 b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u ng\u01b0\u1eddi d\u00f9ng kh\u1ecfi b\u1ecb \u0111\u00e1nh c\u1eafp, m\u00e0 c\u00f2n l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t trong vi\u1ec7c x\u1ebfp h\u1ea1ng trang web tr\u00ean c\u00e1c c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm, \u0111\u00e1nh d\u1ea5u s\u1ef1 tin c\u1eady c\u1ee7a tr\u00ecnh duy\u1ec7t, v\u00e0 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 tu\u00e2n th\u1ee7 quy \u0111\u1ecbnh ph\u00e1p l\u00fd.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ch\u1ee9ng ch\u1ec9 SSL<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ee9c n\u0103ng c\u1ed1t l\u00f5i c\u1ee7a ch\u1ee9ng ch\u1ec9 SSL l\u00e0 thi\u1ebft l\u1eadp m\u1ed9t k\u00eanh truy\u1ec1n th\u00f4ng \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a gi\u1eefa m\u00e1y kh\u00e1ch (ch\u1eb3ng h\u1ea1n nh\u01b0 tr\u00ecnh duy\u1ec7t) v\u00e0 m\u00e1y ch\u1ee7 (ch\u1eb3ng h\u1ea1n nh\u01b0 trang web). Qu\u00e1 tr\u00ecnh n\u00e0y ch\u1ee7 y\u1ebfu d\u1ef1a tr\u00ean 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, v\u00e0 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n th\u00f4ng qua m\u1ed9t lo\u1ea1t c\u00e1c b\u01b0\u1edbc \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201cqu\u00e1 tr\u00ecnh giao ti\u1ebfp SSL\/TLS\u201d (SSL\/TLS handshake).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">M\u00e3 h\u00f3a b\u1ea5t \u0111\u1ed1i x\u1ee9ng v\u00e0 trao \u0111\u1ed5i kh\u00f3a<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Trong giai \u0111o\u1ea1n \u0111\u1ea7u c\u1ee7a qu\u00e1 tr\u00ecnh b\u1eaft tay (handshake), m\u00e1y ch\u1ee7 s\u1ebd tr\u00ecnh b\u00e0y ch\u1ee9ng ch\u1ec9 SSL c\u1ee7a m\u00ecnh cho m\u00e1y kh\u00e1ch. Ch\u1ee9ng ch\u1ec9 n\u00e0y ch\u1ee9a kh\u00f3a c\u00f4ng khai c\u1ee7a m\u00e1y ch\u1ee7 v\u00e0 \u0111\u01b0\u1ee3c t\u1ed5 ch\u1ee9c c\u1ea5p ch\u1ee9ng ch\u1ec9 \u0111\u00e1ng tin c\u1eady k\u00fd s\u1ed1 h\u00f3a. M\u00e1y kh\u00e1ch s\u1eed d\u1ee5ng ch\u1ee9ng ch\u1ec9 g\u1ed1c (root certificate) c\u1ee7a t\u1ed5 ch\u1ee9c c\u1ea5p ch\u1ee9ng ch\u1ec9 (CA) \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t s\u1eb5n trong h\u1ec7 \u0111i\u1ec1u h\u00e0nh ho\u1eb7c tr\u00ecnh duy\u1ec7t \u0111\u1ec3 x\u00e1c minh t\u00ednh x\u00e1c th\u1ef1c v\u00e0 hi\u1ec7u l\u1ef1c c\u1ee7a ch\u1ee9ng ch\u1ec9 m\u00e1y ch\u1ee7. Sau khi x\u00e1c minh th\u00e0nh c\u00f4ng, m\u00e1y kh\u00e1ch s\u1ebd t\u1ea1o ra m\u1ed9t \u201ckh\u00f3a phi\u00ean\u201d (session key) ng\u1eabu nhi\u00ean.<\/p>\n<!-- AUTO_INTERNAL_LINKS_START --><p>\u0110\u1ecdc th\u00eam <a href=\"https:\/\/www.likacloud.com\/de\/knowledge\/ssl-certificate\/ssl-certificate-types-how-it-works-deployment-best-practices-guide-2026\/\">Ph\u00e2n t\u00edch s\u00e2u v\u1ec1 ch\u1ee9ng ch\u1ec9 SSL: H\u01b0\u1edbng d\u1eabn v\u1ec1 lo\u1ea1i, nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng v\u00e0 c\u00e1c th\u1ef1c h\u00e0nh tri\u1ec3n khai t\u1ed1t nh\u1ea5t<\/a>\u3002<\/p><!-- AUTO_INTERNAL_LINKS_END -->\n\n\n\n\n<h3 class=\"wp-block-heading\">Thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i an to\u00e0n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00e1ch h\u00e0ng s\u1eed d\u1ee5ng kh\u00f3a c\u00f4ng c\u1ee7a m\u00e1y ch\u1ee7 \u0111\u1ec3 m\u00e3 h\u00f3a \u201ckh\u00f3a cu\u1ed9c tr\u00f2 chuy\u1ec7n\u201d n\u00e0y v\u00e0 g\u1eedi n\u00f3 v\u1ec1 m\u00e1y ch\u1ee7. Ch\u1ec9 m\u00e1y ch\u1ee7 s\u1edf h\u1eefu kh\u00f3a ri\u00eang t\u01b0\u01a1ng \u1ee9ng m\u1edbi c\u00f3 th\u1ec3 gi\u1ea3i m\u00e3 kh\u00f3a cu\u1ed9c tr\u00f2 chuy\u1ec7n \u0111\u00f3. Sau \u0111\u00f3, c\u1ea3 hai b\u00ean s\u1ebd s\u1eed d\u1ee5ng kh\u00f3a cu\u1ed9c tr\u00f2 chuy\u1ec7n chung n\u00e0y \u0111\u1ec3 th\u1ef1c hi\u1ec7n giao ti\u1ebfp b\u1eb1ng ph\u01b0\u01a1ng th\u1ee9c m\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng. C\u00e1c thu\u1eadt to\u00e1n m\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng (nh\u01b0 AES) c\u00f3 t\u1ed1c \u0111\u1ed9 m\u00e3 h\u00f3a v\u00e0 gi\u1ea3i m\u00e3 nhanh, ph\u00f9 h\u1ee3p \u0111\u1ec3 truy\u1ec1n t\u1ea3i l\u01b0\u1ee3ng d\u1eef li\u1ec7u l\u1edbn, trong khi c\u00e1c thu\u1eadt to\u00e1n m\u00e3 h\u00f3a b\u1ea5t \u0111\u1ed1i x\u1ee9ng (nh\u01b0 RSA, ECC) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong giai \u0111o\u1ea1n thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i (handshake) gi\u00fap gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 ph\u00e2n ph\u1ed1i kh\u00f3a m\u1ed9t c\u00e1ch an to\u00e0n.<\/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\">C\u00e1c lo\u1ea1i ch\u1ee9ng ch\u1ec9 SSL c\u1ed1t l\u00f5i 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 h\u1ed7 tr\u1ee3, ch\u1ee9ng ch\u1ec9 SSL \u0111\u01b0\u1ee3c chia th\u00e0nh ba lo\u1ea1i ch\u00ednh, nh\u1eb1m \u0111\u00e1p \u1ee9ng c\u00e1c nhu c\u1ea7u v\u1ec1 b\u1ea3o m\u1eadt v\u00e0 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\u01a1 b\u1ea3n nh\u1ea5t d\u00f9ng \u0111\u1ec3 x\u00e1c th\u1ef1c quy\u1ec1n s\u1edf h\u1eefu t\u00ean mi\u1ec1n. C\u01a1 quan c\u1ea5p ch\u1ee9ng ch\u1ec9 (CA \u2013 Certificate Authority) ch\u1ec9 ki\u1ec3m tra xem ng\u01b0\u1eddi n\u1ed9p \u0111\u01a1n c\u00f3 th\u1ef1c s\u1ef1 l\u00e0 ch\u1ee7 s\u1edf h\u1eefu t\u00ean mi\u1ec1n hay kh\u00f4ng (th\u00f4ng th\u01b0\u1eddng th\u00f4ng qua email ho\u1eb7c b\u1ea3n ghi DNS), qu\u00e1 tr\u00ecnh x\u00e1c th\u1ef1c di\u1ec5n ra nhanh ch\u00f3ng v\u00e0 chi ph\u00ed th\u1ea5p, th\u1eadm ch\u00ed c\u00f3 th\u1ec3 mi\u1ec5n ph\u00ed. DV ch\u1ee9ng ch\u1ec9 cung c\u1ea5p ch\u1ee9c n\u0103ng m\u00e3 h\u00f3a c\u01a1 b\u1ea3n cho trang web, nh\u01b0ng thanh \u0111\u1ecba ch\u1ec9 tr\u00ecnh duy\u1ec7t ch\u1ec9 hi\u1ec3n th\u1ecb bi\u1ec3u t\u01b0\u1ee3ng kh\u00f3a m\u00e0 kh\u00f4ng hi\u1ec3n th\u1ecb t\u00ean c\u00f4ng ty. Lo\u1ea1i ch\u1ee9ng ch\u1ec9 n\u00e0y ph\u00f9 h\u1ee3p cho blog c\u00e1 nh\u00e2n, m\u00f4i tr\u01b0\u1eddng th\u1eed nghi\u1ec7m ho\u1eb7c h\u1ec7 th\u1ed1ng n\u1ed9i b\u1ed9.<\/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 tin c\u1eady 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 k\u1ef9 l\u01b0\u1ee1ng t\u00ednh h\u1ee3p ph\u00e1p th\u1ef1c s\u1ef1 c\u1ee7a t\u1ed5 ch\u1ee9c n\u1ed9p \u0111\u01a1n (v\u00ed d\u1ee5: th\u00f4ng tin \u0111\u0103ng k\u00fd c\u00f4ng ty). Th\u00f4ng tin chi ti\u1ebft v\u1ec1 ch\u1ee9ng ch\u1ec9 s\u1ebd bao g\u1ed3m t\u00ean c\u1ee7a doanh nghi\u1ec7p. OV ch\u1ee9ng ch\u1ec9 gi\u00fap ch\u1ee9ng minh v\u1edbi ng\u01b0\u1eddi d\u00f9ng r\u1eb1ng trang web \u0111\u00f3 thu\u1ed9c v\u1ec1 m\u1ed9t th\u1ef1c th\u1ec3 c\u00f3 t\u1ed3n t\u1ea1i h\u1ee3p ph\u00e1p, v\u00e0 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c trang web doanh nghi\u1ec7p nh\u01b0 trang web ch\u00ednh th\u1ee9c c\u1ee7a c\u00f4ng ty, n\u1ec1n t\u1ea3ng th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed, v.v.<\/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 c\u00f3 m\u1ee9c \u0111\u1ed9 x\u00e1c th\u1ef1c ch\u1eb7t ch\u1ebd nh\u1ea5t v\u00e0 \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 cao nh\u1ea5t v\u1ec1 m\u1ee9c \u0111\u1ed9 tin c\u1eady. Ng\u01b0\u1eddi n\u1ed9p \u0111\u01a1n ph\u1ea3i tr\u1ea3i qua qu\u00e1 tr\u00ecnh ki\u1ec3m tra danh t\u00ednh doanh nghi\u1ec7p to\u00e0n di\u1ec7n nh\u1ea5t. \u0110\u1eb7c \u0111i\u1ec3m n\u1ed5i b\u1eadt nh\u1ea5t c\u1ee7a EV ch\u1ee9ng ch\u1ec9 l\u00e0 tr\u00ean c\u00e1c tr\u00ecnh duy\u1ec7t h\u1ed7 tr\u1ee3 lo\u1ea1i ch\u1ee9ng ch\u1ec9 n\u00e0y, thanh \u0111\u1ecba ch\u1ec9 kh\u00f4ng ch\u1ec9 hi\u1ec3n th\u1ecb bi\u1ec3u t\u01b0\u1ee3ng kh\u00f3a m\u00e0 c\u00f2n hi\u1ec3n th\u1ecb t\u00ean c\u00f4ng ty b\u1eb1ng m\u00e0u xanh l\u00e1 c\u00e2y, \u0111\u01b0\u1ee3c l\u00e0m n\u1ed5i b\u1eadt. \u0110i\u1ec1u n\u00e0y gi\u00fap t\u0103ng \u0111\u00e1ng k\u1ec3 s\u1ef1 tin t\u01b0\u1edfng c\u1ee7a ng\u01b0\u1eddi d\u00f9ng \u0111\u1ed1i v\u1edbi c\u00e1c trang web th\u1ef1c hi\u1ec7n c\u00e1c giao d\u1ecbch c\u00f3 gi\u00e1 tr\u1ecb cao, ch\u1eb3ng h\u1ea1n nh\u01b0 ng\u00e2n h\u00e0ng, t\u1ed5 ch\u1ee9c t\u00e0i ch\u00ednh, ho\u1eb7c c\u00e1c trang th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed l\u1edbn.<\/p>\n<!-- AUTO_INTERNAL_LINKS_START --><p>\u0110\u1ecdc th\u00eam <a href=\"https:\/\/www.likacloud.com\/de\/knowledge\/ssl-certificate\/ssl-certificate-guide-how-it-works-choose-deploy\/\">Gi\u1ea3i th\u00edch to\u00e0n di\u1ec7n v\u1ec1 ch\u1ee9ng ch\u1ec9 SSL: T\u1eeb nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng \u0111\u1ebfn h\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn v\u00e0 tri\u1ec3n khai<\/a>\u3002<\/p><!-- AUTO_INTERNAL_LINKS_END -->\n\n\n\n\n<p class=\"wp-block-paragraph\">Ngo\u00e0i ra, d\u1ef1a tr\u00ean s\u1ed1 l\u01b0\u1ee3ng t\u00ean mi\u1ec1n \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7, c\u00f2n c\u00f3 ch\u1ee9ng ch\u1ec9 \u0111\u01a1n t\u00ean mi\u1ec1n, ch\u1ee9ng ch\u1ec9 \u0111a t\u00ean mi\u1ec1n v\u00e0 ch\u1ee9ng ch\u1ec9 th\u00f4ng d\u1ee5ng (b\u1ea3o v\u1ec7 m\u1ed9t t\u00ean mi\u1ec1n v\u00e0 t\u1ea5t c\u1ea3 c\u00e1c t\u00ean mi\u1ec1n ph\u1ee5 c\u1ee7a n\u00f3) \u0111\u1ec3 l\u1ef1a ch\u1ecdn.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e1ch \u0111\u0103ng k\u00fd v\u00e0 tri\u1ec3n khai ch\u1ee9ng ch\u1ec9 SSL mi\u1ec5n ph\u00ed<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5Let\u2018s Encrypt\u4e3a\u4ee3\u8868\u7684\u514d\u8d39\u8bc1\u4e66\u9881\u53d1\u673a\u6784\uff0c\u6781\u5927\u5730\u63a8\u52a8\u4e86HTTPS\u7684\u666e\u53ca\u3002\u5176\u9881\u53d1\u7684DV\u8bc1\u4e66\u5b89\u5168\u53ef\u9760\uff0c\u6709\u6548\u671f\u901a\u5e38\u4e3a90\u5929\uff0c\u9700\u8981\u5b9a\u671f\u81ea\u52a8\u7eed\u671f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Quy tr\u00ecnh n\u1ed9p \u0111\u01a1n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u5e38\u7528\u7684\u7533\u8bf7\u5de5\u5177\u662fCertbot\u3002\u7533\u8bf7\u8005\u9700\u8981\u5728\u670d\u52a1\u5668\u4e0a\u8fd0\u884cCertbot\u5ba2\u6237\u7aef\uff0c\u5b83\u4f1a\u81ea\u52a8\u6267\u884c\u4ee5\u4e0b\u6b65\u9aa4\uff1a\u9a8c\u8bc1\u4f60\u5bf9\u57df\u540d\u7684\u63a7\u5236\u6743\uff08\u901a\u8fc7\u5728\u7f51\u7ad9\u6839\u76ee\u5f55\u653e\u7f6e\u7279\u5b9a\u6587\u4ef6\u6216\u6dfb\u52a0DNS TXT\u8bb0\u5f55\uff09\uff1b\u5411Let\u2018s Encrypt\u670d\u52a1\u5668\u53d1\u9001\u8bc1\u4e66\u7b7e\u53d1\u8bf7\u6c42\uff1b\u5728\u9a8c\u8bc1\u901a\u8fc7\u540e\uff0c\u81ea\u52a8\u4e0b\u8f7d\u8bc1\u4e66\u548c\u79c1\u94a5\u6587\u4ef6\u5230\u670d\u52a1\u5668\u6307\u5b9a\u4f4d\u7f6e\u3002<\/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\">Tri\u1ec3n khai v\u00e0 gia h\u1ea1n t\u1ef1 \u0111\u1ed9ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c qu\u1ea3n l\u00fd th\u1eddi h\u1ea1n s\u1eed d\u1ee5ng c\u1ee7a c\u00e1c ch\u1ee9ng ch\u1ec9 mi\u1ec5n ph\u00ed m\u1ed9t c\u00e1ch t\u1ef1 \u0111\u1ed9ng l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft. Certbot c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh \u0111\u1ec3 t\u1ef1 \u0111\u1ed9ng gia h\u1ea1n ch\u1ee9ng ch\u1ec9, th\u01b0\u1eddng th\u00f4ng qua c\u00e1c t\u00e1c v\u1ee5 \u0111\u1ecbnh k\u1ef3 c\u1ee7a h\u1ec7 \u0111i\u1ec1u h\u00e0nh (ch\u1eb3ng h\u1ea1n nh\u01b0 cron job). V\u00ed d\u1ee5, b\u1ea1n c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp \u0111\u1ec3 h\u1ec7 th\u1ed1ng ki\u1ec3m tra h\u00e0ng tu\u1ea7n xem li\u1ec7u ch\u1ee9ng ch\u1ec9 c\u00f3 s\u1eafp h\u1ebft h\u1ea1n hay kh\u00f4ng (n\u1ebfu th\u1eddi gian c\u00f2n l\u1ea1i \u00edt h\u01a1n 30 ng\u00e0y); n\u1ebfu \u0111\u00fang nh\u01b0 v\u1eady, qu\u00e1 tr\u00ecnh gia h\u1ea1n s\u1ebd \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ef1 \u0111\u1ed9ng, \u0111\u1ed3ng th\u1eddi c\u1ea5u h\u00ecnh c\u1ee7a m\u00e1y ch\u1ee7 web (nh\u01b0 Nginx, Apache) s\u1ebd \u0111\u01b0\u1ee3c t\u1ea3i l\u1ea1i m\u00e0 kh\u00f4ng c\u1ea7n s\u1ef1 can thi\u1ec7p c\u1ee7a con ng\u01b0\u1eddi. \u0110i\u1ec1u n\u00e0y gi\u00fap gi\u1ea3m \u0111\u00e1ng k\u1ec3 chi ph\u00ed b\u1ea3o tr\u00ec c\u00e1c ch\u1ee9ng ch\u1ec9 mi\u1ec5n ph\u00ed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quy tr\u00ecnh \u0111\u0103ng k\u00fd v\u00e0 l\u1ee3i \u00edch c\u1ee7a ch\u1ee9ng ch\u1ec9 SSL tr\u1ea3 ph\u00ed<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u1ea5y ch\u1ee9ng nh\u1eadn SSL c\u00f3 ph\u00ed cung c\u1ea5p nhi\u1ec1u gi\u00e1 tr\u1ecb b\u1ed5 sung, s\u1ef1 \u0111\u1ea3m b\u1ea3o d\u1ecbch v\u1ee5 v\u00e0 t\u00ednh n\u0103ng h\u01a1n so v\u1edbi nh\u1eefng gi\u1ea5y ch\u1ee9ng nh\u1eadn mi\u1ec5n ph\u00ed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Quy tr\u00ecnh n\u1ed9p \u0111\u01a1n ti\u00eau chu\u1ea9n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Quy tr\u00ecnh mua ch\u1ee9ng ch\u1ec9 tr\u1ea3 ph\u00ed th\u01b0\u1eddng bao g\u1ed3m: \u0110\u1ea7u ti\u00ean, ch\u1ecdn lo\u1ea1i ch\u1ee9ng ch\u1ec9 ph\u00f9 h\u1ee3p tr\u00ean trang web c\u1ee7a nh\u00e0 cung c\u1ea5p ho\u1eb7c \u0111\u1ea1i l\u00fd (OV\/EV, t\u00ean mi\u1ec1n \u0111\u01a1n\/t\u00ean mi\u1ec1n nhi\u1ec1u\/t\u00ean mi\u1ec1n k\u00fd t\u1ef1 \u0111\u1ea1i di\u1ec7n) v\u00e0 ho\u00e0n t\u1ea5t thanh to\u00e1n. Sau \u0111\u00f3, t\u1ea1o y\u00eau c\u1ea7u k\u00fd ch\u1ee9ng ch\u1ec9 (CSR) tr\u00ean n\u1ec1n t\u1ea3ng qu\u1ea3n l\u00fd c\u1ee7a nh\u00e0 cung c\u1ea5p. CSR ch\u1ee9a kh\u00f3a c\u00f4ng khai v\u00e0 th\u00f4ng tin t\u1ed5 ch\u1ee9c c\u1ee7a b\u1ea1n, \u0111\u1ed3ng th\u1eddi h\u1ec7 th\u1ed1ng s\u1ebd t\u1ea1o kh\u00f3a ri\u00eang t\u01b0 t\u01b0\u01a1ng \u1ee9ng tr\u00ean m\u00e1y c\u1ee5c b\u1ed9, kh\u00f3a ri\u00eang t\u01b0 n\u00e0y ph\u1ea3i \u0111\u01b0\u1ee3c b\u1ea3o qu\u1ea3n an to\u00e0n. Ti\u1ebfp theo, n\u1ed9p t\u00e0i li\u1ec7u x\u00e1c minh theo c\u1ea5p \u0111\u1ed9 x\u00e1c th\u1ef1c c\u1ee7a ch\u1ee9ng ch\u1ec9. \u0110\u1ed1i v\u1edbi ch\u1ee9ng ch\u1ec9 OV\/EV, c\u1ea7n n\u1ed9p c\u00e1c t\u00e0i li\u1ec7u nh\u01b0 gi\u1ea5y ph\u00e9p kinh doanh doanh nghi\u1ec7p, x\u00e1c minh \u0111i\u1ec7n tho\u1ea1i. Sau khi CA ph\u00ea duy\u1ec7t, s\u1ebd cung c\u1ea5p t\u1ec7p ch\u1ee9ng ch\u1ec9 \u0111\u00e3 k\u00fd qua email ho\u1eb7c b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n. Cu\u1ed1i c\u00f9ng, tri\u1ec3n khai t\u1ec7p ch\u1ee9ng ch\u1ec9 v\u00e0 kh\u00f3a ri\u00eang t\u01b0 l\u00ean m\u00e1y ch\u1ee7 web, v\u00e0 c\u1ea5u h\u00ecnh chuy\u1ec3n h\u01b0\u1edbng HTTPS b\u1eaft bu\u1ed9c.<\/p>\n<!-- AUTO_INTERNAL_LINKS_START --><p>\u0110\u1ecdc th\u00eam <a href=\"https:\/\/www.likacloud.com\/de\/knowledge\/ssl-certificate\/ssl-certificate-types-buy-install-secure-deployment-guide\/\">H\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n v\u1ec1 ch\u1ee9ng ch\u1ec9 SSL: Ph\u00e2n lo\u1ea1i, mua, c\u00e0i \u0111\u1eb7t v\u00e0 tri\u1ec3n khai an to\u00e0n<\/a>\u3002<\/p><!-- AUTO_INTERNAL_LINKS_END -->\n\n\n\n\n<h3 class=\"wp-block-heading\">Nh\u1eefng \u01b0u \u0111i\u1ec3m n\u1ed5i b\u1eadt c\u1ee7a ch\u1ee9ng ch\u1ec9 c\u00f3 ph\u00ed:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">L\u1ee3i th\u1ebf c\u1ee7a c\u00e1c ch\u1ee9ng ch\u1ec9 c\u00f3 ph\u00ed kh\u00f4ng ch\u1ec9 n\u1eb1m \u1edf vi\u1ec7c ch\u00fang mang l\u1ea1i d\u1ea5u hi\u1ec7u tin c\u1eady cao h\u01a1n m\u00e0 c\u00f2n \u1edf nh\u1eefng \u01b0u \u0111\u00e3i v\u1ec1 b\u1ea3o h\u00e0nh kinh doanh. Th\u00f4ng th\u01b0\u1eddng, ch\u00fang cung c\u1ea5p m\u1ee9c b\u1ea3o h\u00e0nh l\u1edbn h\u01a1n; v\u00ed d\u1ee5, n\u1ebfu ng\u01b0\u1eddi d\u00f9ng g\u1eb7p thi\u1ec7t h\u1ea1i do v\u1ea5n \u0111\u1ec1 li\u00ean quan \u0111\u1ebfn ch\u1ee9ng ch\u1ec9, h\u1ecd c\u00f3 th\u1ec3 nh\u1eadn \u0111\u01b0\u1ee3c kho\u1ea3n b\u1ed3i th\u01b0\u1eddng t\u1eeb v\u00e0i tr\u0103m ngh\u00ecn \u0111\u1ebfn v\u00e0i tri\u1ec7u \u0111\u00f4 la M\u1ef9. D\u1ecbch v\u1ee5 h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt c\u0169ng \u0111\u01b0\u1ee3c cung c\u1ea5p m\u1ed9t c\u00e1ch nhanh ch\u00f3ng v\u00e0 chuy\u00ean nghi\u1ec7p h\u01a1n. Ngo\u00e0i ra, c\u00e1c ch\u1ee9ng ch\u1ec9 c\u00f3 ph\u00ed th\u01b0\u1eddng c\u00f3 t\u00ednh t\u01b0\u01a1ng th\u00edch r\u1ed9ng h\u01a1n, \u0111\u1ea3m b\u1ea3o tr\u1ea3i nghi\u1ec7m truy c\u1eadp trang web m\u00e0 kh\u00f4ng g\u1eb7p tr\u1edf ng\u1ea1i ngay c\u1ea3 tr\u00ean nh\u1eefng thi\u1ebft b\u1ecb ho\u1eb7c tr\u00ecnh duy\u1ec7t c\u0169. \u0110\u1ed1i v\u1edbi c\u00e1c ch\u1ee9ng ch\u1ec9 lo\u1ea1i OV (Organizational Validation) v\u00e0 EV (Extended Validation), gi\u00e1 tr\u1ecb l\u1edbn nh\u1ea5t c\u1ee7a ch\u00fang n\u1eb1m \u1edf vi\u1ec7c k\u1ebft n\u1ed1i danh t\u00ednh th\u1ef1c t\u1ebf c\u1ee7a doanh nghi\u1ec7p v\u1edbi trang web, t\u1ea1o ra m\u1ed9t m\u1ed1i quan h\u1ec7<\/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 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu \u0111\u1ec3 x\u00e2y d\u1ef1ng m\u1ed9t kh\u00f4ng gian m\u1ea1ng an to\u00e0n v\u00e0 \u0111\u00e1ng tin c\u1eady. Vi\u1ec7c hi\u1ec3u r\u00f5 nguy\u00ean l\u00fd m\u00e3 h\u00f3a c\u1ee7a n\u00f3 s\u1ebd gi\u00fap ch\u00fang ta nh\u1eadn th\u1ee9c \u0111\u01b0\u1ee3c t\u1ea7m quan tr\u1ecdng c\u1ee7a n\u00f3. Khi l\u1ef1a ch\u1ecdn ch\u1ee9ng ch\u1ec9, c\u1ea7n xem x\u00e9t \u0111\u1ebfn lo\u1ea1i trang web, y\u00eau c\u1ea7u v\u1ec1 m\u1ee9c \u0111\u1ed9 tin c\u1eady v\u00e0 ng\u00e2n s\u00e1ch: \u0110\u1ed1i v\u1edbi c\u00e1c trang web c\u00e1 nh\u00e2n ho\u1eb7c d\u1ecbch v\u1ee5 kh\u00f4ng quan tr\u1ecdng, c\u00f3 th\u1ec3 \u01b0u ti\u00ean s\u1eed d\u1ee5ng ch\u1ee9ng ch\u1ec9 DV mi\u1ec5n ph\u00ed \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd t\u1ef1 \u0111\u1ed9ng; trong khi \u0111\u00f3, c\u00e1c trang web th\u01b0\u01a1ng m\u1ea1i, \u0111\u1eb7c bi\u1ec7t l\u00e0 nh\u1eefng n\u1ec1n t\u1ea3ng li\u00ean quan \u0111\u1ebfn giao d\u1ecbch v\u00e0 th\u00f4ng tin nh\u1ea1y c\u1ea3m, n\u00ean \u0111\u1ea7u t\u01b0 v\u00e0o ch\u1ee9ng ch\u1ec9 OV ho\u1eb7c EV \u0111\u1ec3 ch\u1ee9ng minh danh t\u00ednh c\u1ee7a t\u1ed5 ch\u1ee9c v\u00e0 nh\u1eadn \u0111\u01b0\u1ee3c s\u1ef1 b\u1ea3o v\u1ec7 to\u00e0n di\u1ec7n h\u01a1n. D\u00f9 ch\u1ecdn lo\u1ea1i ch\u1ee9ng ch\u1ec9 n\u00e0o, vi\u1ec7c tri\u1ec3n khai v\u00e0 k\u00edch ho\u1ea1t HTTPS m\u1ed9t c\u00e1ch \u0111\u00fang c\u00e1ch l\u00e0 bi\u1ec3u hi\u1ec7n c\u1ee7a s\u1ef1 tr\u00e1ch nhi\u1ec7m \u0111\u1ed1i v\u1edbi ng\u01b0\u1eddi d\u00f9ng v\u00e0 th\u01b0\u01a1ng hi\u1ec7u c\u1ee7a m\u00ecnh.<\/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 v\u00e0 ch\u1ee9ng ch\u1ec9 TLS kh\u00e1c nhau nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">SSL v\u00e0 TLS l\u00e0 c\u00e1c giao th\u1ee9c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 m\u00e3 h\u00f3a th\u00f4ng tin trong qu\u00e1 tr\u00ecnh truy\u1ec1n th\u00f4ng. TLS l\u00e0 phi\u00ean b\u1ea3n n\u00e2ng c\u1ea5p c\u1ee7a SSL, mang l\u1ea1i m\u1ee9c \u0111\u1ed9 b\u1ea3o m\u1eadt cao h\u01a1n. Do l\u00fd do l\u1ecbch s\u1eed, ng\u01b0\u1eddi ta th\u01b0\u1eddng g\u1ecdi chung c\u00e1c ch\u1ee9ng ch\u1ec9 b\u1ea3o m\u1eadt \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 tri\u1ec3n khai HTTPS l\u00e0 \u201cch\u1ee9ng ch\u1ec9 SSL\u201d, m\u1eb7c d\u00f9 giao th\u1ee9c th\u1ef1c t\u1ebf \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng hi\u1ec7n nay l\u00e0 TLS.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Li\u1ec7u vi\u1ec7c c\u00e0i \u0111\u1eb7t ch\u1ee9ng ch\u1ec9 SSL tr\u00ean trang web c\u00f3 \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\/TLS ch\u1ee7 y\u1ebfu \u0111\u1ea3m b\u1ea3o vi\u1ec7c m\u00e3 h\u00f3a v\u00e0 b\u1ea3o m\u1eadt d\u1eef li\u1ec7u trong qu\u00e1 tr\u00ecnh truy\u1ec1n t\u1ea3i, ng\u0103n ch\u1eb7n vi\u1ec7c d\u1eef li\u1ec7u b\u1ecb nghe l\u00e9n ho\u1eb7c s\u1eeda \u0111\u1ed5i. N\u00f3 kh\u00f4ng th\u1ec3 ng\u0103n ch\u1eb7n \u0111\u01b0\u1ee3c c\u00e1c nguy c\u01a1 nh\u01b0 m\u00e1y ch\u1ee7 web b\u1ecb x\u00e2m nh\u1eadp b\u1edfi hacker, l\u1ed7 h\u1ed5ng trong ch\u01b0\u01a1ng tr\u00ecnh web (ch\u1eb3ng h\u1ea1n nh\u01b0 l\u1ed7 h\u1ed5ng SQL injection, cross-site scripting), ho\u1eb7c m\u00e1y t\u00ednh c\u1ee7a ng\u01b0\u1eddi d\u00f9ng b\u1ecb nhi\u1ec5m virus. B\u1ea3o m\u1eadt trang web l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p, v\u00e0 ch\u1ee9ng ch\u1ec9 SSL\/TLS l\u00e0 m\u1ed9t ph\u1ea7n r\u1ea5t quan tr\u1ecdng trong \u0111\u00f3, nh\u01b0ng kh\u00f4ng ph\u1ea3i l\u00e0 t\u1ea5t c\u1ea3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ch\u1ee9ng ch\u1ec9 \u0111\u1ed1i v\u1edbi t\u00ean mi\u1ec1n chung (wildcard) c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 t\u1ea5t c\u1ea3 c\u00e1c t\u00ean mi\u1ec1n ph\u1ee5 kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">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 c\u1ee5 th\u1ec3 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, ch\u1ee9ng ch\u1ec9 \u0111\u01b0\u1ee3c c\u1ea5p cho\u2026 <code data-no-auto-translation=\"\">*.example.com<\/code>V\u1eady th\u00ec\u2026 <code data-no-auto-translation=\"\">blog.example.com<\/code>\u3001<code data-no-auto-translation=\"\">shop.example.com<\/code>\u3001<code data-no-auto-translation=\"\">mail.example.com<\/code> T\u1ea5t c\u1ea3 nh\u1eefng tr\u01b0\u1eddng h\u1ee3p \u0111\u00f3 \u0111\u1ec1u c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00f9ng m\u1ed9t ch\u1ee9ng ch\u1ec9. Tuy nhi\u00ean, ch\u1ee9ng ch\u1ec9 \u0111\u00f3 kh\u00f4ng th\u1ec3 b\u1ea3o v\u1ec7 c\u00e1c t\u00ean mi\u1ec1n con \u1edf nhi\u1ec1u c\u1ea5p \u0111\u1ed9. V\u00ed d\u1ee5: <code data-no-auto-translation=\"\">dev.www.example.com<\/code> Th\u00ec s\u1ebd kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c\u2026 <code data-no-auto-translation=\"\">*.example.com<\/code> \u0110\u00e8 l\u00ean.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e1c ch\u1ee9ng ch\u1ec9 SSL tr\u1ea3 ph\u00ed c\u00f3 an to\u00e0n h\u01a1n so v\u1edbi c\u00e1c ch\u1ee9ng ch\u1ec9 mi\u1ec5n ph\u00ed kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ece\u52a0\u5bc6\u5f3a\u5ea6\u6765\u770b\uff0c\u4ed8\u8d39\u548c\u514d\u8d39\u8bc1\u4e66\uff08\u5982Let\u2018s Encrypt\uff09\u901a\u5e38\u4f7f\u7528\u76f8\u540c\u7684\u52a0\u5bc6\u7b97\u6cd5\u548c\u5bc6\u94a5\u957f\u5ea6\uff0c\u57fa\u7840\u7684\u52a0\u5bc6\u5b89\u5168\u7ea7\u522b\u662f\u76f8\u540c\u7684\u3002\u4ed8\u8d39\u8bc1\u4e66\u7684\u201c\u5b89\u5168\u201d\u4f18\u52bf\u66f4\u591a\u4f53\u73b0\u5728\u9644\u52a0\u4ef7\u503c\u4e0a\uff1a\u66f4\u4e25\u683c\u7684\u8eab\u4efd\u9a8c\u8bc1\u5e26\u6765\u7684\u4fe1\u4efb\u63d0\u5347\u3001\u8d44\u91d1\u4fdd\u4fee\u3001\u66f4\u597d\u7684\u6280\u672f\u652f\u6301\u548c\u66f4\u5e7f\u6cdb\u7684\u8001\u65e7\u7cfb\u7edf\u517c\u5bb9\u6027\u3002\u5bf9\u4e8e\u9700\u8981\u5efa\u7acb\u5f3a\u5927\u54c1\u724c\u4fe1\u4efb\u7684\u7f51\u7ad9\uff0c\u8fd9\u4e9b\u9644\u52a0\u4ef7\u503c\u81f3\u5173\u91cd\u8981\u3002<\/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 d\u1eef li\u1ec7u theo giao th\u1ee9c HTTPS, t\u1eeb \u0111\u00f3 b\u1ea3o v\u1ec7 an ninh v\u00e0 t\u1ea1o l\u00f2ng tin cho trang web. B\u00e0i vi\u1ebft n\u00e0y ph\u00e2n t\u00edch chi ti\u1ebft c\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00f4ng ngh\u1ec7 m\u00e3 h\u00f3a SSL\/TLS, so s\u00e1nh c\u00e1c lo\u1ea1i ch\u1ee9ng ch\u1ec9 nh\u01b0 DV, OV, EV v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m v\u00e0 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng ph\u00f9 h\u1ee3p, \u0111\u1ed3ng th\u1eddi h\u01b0\u1edbng d\u1eabn c\u00e1ch \u0111\u0103ng k\u00fd v\u00e0 tri\u1ec3n khai c\u00e1c ch\u1ee9ng ch\u1ec9 SSL mi\u1ec5n ph\u00ed c\u0169ng nh\u01b0 c\u00f3 ph\u00ed m\u1ed9t c\u00e1ch chi ti\u1ebft, bao g\u1ed3m c\u1ea3 c\u00e1c thao t\u00e1c quan tr\u1ecdng nh\u01b0 t\u1ef1 \u0111\u1ed9ng gia h\u1ea1n ch\u1ee9ng ch\u1ec9.<\/p>","protected":false},"author":7,"featured_media":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"tags":[341,11,583,338,335],"knowledge_category":[277],"class_list":["post-12367988","knowledge_post","type-knowledge_post","status-publish","hentry","tag-https-encryption","tag-ssl-certificate","tag-tls-handshake","tag-cybersecurity","tag-certificate-application","knowledge_category-ssl-certificate"],"acf":{"site_seo_keywords":"SSL\u8bc1\u4e66,HTTPS\u52a0\u5bc6,\u514d\u8d39SSL\u8bc1\u4e66\u7533\u8bf7,\u4ed8\u8d39SSL\u8bc1\u4e66,SSL\u8bc1\u4e66\u7c7b\u578b,SSL\u5de5\u4f5c\u539f\u7406,\u8bc1\u4e66\u7533\u8bf7\u6d41\u7a0b,SSL\u8bc1\u4e66\u90e8\u7f72"},"_links":{"self":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_posts\/12367988","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\/12367988\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/media?parent=12367988"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/tags?post=12367988"},{"taxonomy":"knowledge_category","embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_category?post=12367988"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}