{"id":12372590,"date":"2026-03-16T16:02:20","date_gmt":"2026-03-16T08:02:20","guid":{"rendered":"https:\/\/www.likacloud.com\/knowledge\/ssl%e8%af%81%e4%b9%a6%e8%af%a6%e8%a7%a3%ef%bc%9a%e4%b8%ba%e6%82%a8%e7%9a%84%e7%bd%91%e7%ab%99%e6%9e%84%e5%bb%ba%e5%ae%89%e5%85%a8%e7%9b%be%e7%89%8c%e4%b8%8ehttps%e5%8a%a0%e5%af%86%e6%8c%87%e5%8d%97\/"},"modified":"2026-03-16T16:18:29","modified_gmt":"2026-03-16T08:18:29","slug":"ssl-certificate-guide-https-encryption-website-security","status":"publish","type":"knowledge_post","link":"https:\/\/www.likacloud.com\/vi\/knowledge\/ssl-certificate\/ssl-certificate-guide-https-encryption-website-security\/","title":{"rendered":"Gi\u1ea3i th\u00edch chi ti\u1ebft v\u1ec1 ch\u1ee9ng ch\u1ec9 SSL: X\u00e2y d\u1ef1ng l\u00e1 ch\u1eafn b\u1ea3o m\u1eadt v\u00e0 h\u01b0\u1edbng d\u1eabn m\u00e3 h\u00f3a HTTPS cho website c\u1ee7a b\u1ea1n"},"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 d\u1eef li\u1ec7u theo 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. Ch\u1ee9ng ch\u1ec9 SSL thi\u1ebft l\u1eadp m\u1ed9t k\u00eanh truy\u1ec1n th\u00f4ng \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a gi\u1eefa tr\u00ecnh duy\u1ec7t c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 m\u00e1y ch\u1ee7 web, \u0111\u1ea3m b\u1ea3o r\u1eb1ng t\u1ea5t c\u1ea3 d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n \u0111i (nh\u01b0 th\u00f4ng tin \u0111\u0103ng nh\u1eadp, th\u00f4ng tin thanh to\u00e1n, d\u1eef li\u1ec7u c\u00e1 nh\u00e2n) kh\u00f4ng b\u1ecb c\u00e1c b\u00ean th\u1ee9 ba \u0111\u00e1nh c\u1eafp ho\u1eb7c s\u1eeda \u0111\u1ed5i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi ch\u1ee7 s\u1edf h\u1eefu trang web, vi\u1ec7c tri\u1ec3n khai ch\u1ee9ng ch\u1ec9 SSL kh\u00f4ng ch\u1ec9 l\u00e0 tr\u00e1ch nhi\u1ec7m nh\u1eb1m b\u1ea3o v\u1ec7 ng\u01b0\u1eddi d\u00f9ng m\u00e0 c\u00f2n l\u00e0 b\u01b0\u1edbc quan tr\u1ecdng \u0111\u1ec3 n\u00e2ng cao th\u1ee9 h\u1ea1ng tr\u00ean c\u00e1c c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm, nh\u1eadn \u0111\u01b0\u1ee3c bi\u1ec3u t\u01b0\u1ee3ng \u201can to\u00e0n\u201d t\u1eeb tr\u00ecnh duy\u1ec7t, v\u00e0 x\u00e2y d\u1ef1ng uy t\u00edn th\u01b0\u01a1ng hi\u1ec7u. D\u00f9 l\u00e0 blog c\u00e1 nh\u00e2n, trang web doanh nghi\u1ec7p hay n\u1ec1n t\u1ea3ng th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed, vi\u1ec7c hi\u1ec3u r\u00f5 v\u00e0 s\u1eed d\u1ee5ng \u0111\u00fang c\u00e1ch ch\u1ee9ng ch\u1ec9 SSL \u0111\u1ec1u c\u1ef1c k\u1ef3 quan tr\u1ecdng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Kh\u00e1i ni\u1ec7m c\u1ed1t l\u00f5i v\u00e0 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\">SSL ch\u1ee9ng ch\u1ec9, to\u00e0n t\u00ean l\u00e0 Secure Sockets Layer Certificate, hi\u1ec7n \u0111\u00e3 \u0111\u01b0\u1ee3c thay th\u1ebf b\u1eb1ng giao th\u1ee9c k\u1ebf nhi\u1ec7m l\u00e0 TLS (Transport Layer Security), tuy nhi\u00ean trong ng\u00e0nh v\u1eabn th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi chung l\u00e0 SSL. Ch\u1ee9c n\u0103ng c\u1ed1t l\u00f5i c\u1ee7a n\u00f3 l\u00e0 cung c\u1ea5p b\u1ea3o m\u1eadt v\u00e0 \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u cho c\u00e1c cu\u1ed9c giao ti\u1ebfp tr\u00ean m\u1ea1ng.<\/p>\n<!-- AUTO_INTERNAL_LINKS_START --><p>\u0110\u1ecdc th\u00eam <a href=\"https:\/\/www.likacloud.com\/vi\/nl\/knowledge\/ssl-certificate\/ssl-certificate-types-how-it-works-website-security-deployment-guide\/\">H\u01b0\u1edbng d\u1eabn chi ti\u1ebft v\u1ec1 ch\u1ee9ng ch\u1ec9 SSL: C\u00e1c lo\u1ea1i, nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng v\u00e0 to\u00e0n b\u1ed9 quy tr\u00ecnh tri\u1ec3n khai b\u1ea3o m\u1eadt cho website<\/a>\u3002<\/p><!-- AUTO_INTERNAL_LINKS_END -->\n\n\n\n\n<h3 class=\"wp-block-heading\">SSL\/TLS Handshake l\u00e0 g\u00ec<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Khi ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp m\u1ed9t trang web \u0111\u00e3 b\u1eadt ch\u1ee9c n\u0103ng HTTPS, tr\u00ecnh duy\u1ec7t v\u00e0 m\u00e1y ch\u1ee7 s\u1ebd th\u1ef1c hi\u1ec7n m\u1ed9t qu\u00e1 tr\u00ecnh giao ti\u1ebfp nhanh ch\u00f3ng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201cSSL\/TLS handshake\u201d. Qu\u00e1 tr\u00ecnh n\u00e0y kh\u00f4ng y\u00eau c\u1ea7u s\u1ef1 ti\u1ebfp x\u00fac v\u1eadt l\u00fd gi\u1eefa hai b\u00ean, m\u00e0 l\u00e0 m\u1ed9t lo\u1ea1t c\u00e1c b\u01b0\u1edbc trao \u0111\u1ed5i \u0111\u01b0\u1ee3c t\u1ef1 \u0111\u1ed9ng th\u1ef1c hi\u1ec7n th\u00f4ng qua c\u00e1c thu\u1eadt to\u00e1n m\u00e3 h\u00f3a. M\u1ee5c \u0111\u00edch ch\u00ednh c\u1ee7a qu\u00e1 tr\u00ecnh handshake l\u00e0 x\u00e1c th\u1ef1c danh t\u00ednh c\u1ee7a m\u00e1y ch\u1ee7 v\u00e0 th\u1ecfa thu\u1eadn \u0111\u1ec3 t\u1ea1o ra m\u1ed9t \u201ckh\u00f3a phi\u00ean\u201d (session key) m\u00e0 ch\u1ec9 c\u00f3 hai b\u00ean m\u1edbi bi\u1ebft \u0111\u1ebfn. Kh\u00f3a n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 b\u1ea3o m\u1eadt d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c trao \u0111\u1ed5i gi\u1eefa tr\u00ecnh duy\u1ec7t v\u00e0 m\u00e1y ch\u1ee7.<\/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<p class=\"wp-block-paragraph\">C\u1ee5 th\u1ec3 h\u01a1n, m\u00e1y ch\u1ee7 s\u1ebd g\u1eedi ch\u1ee9ng ch\u1ec9 SSL c\u1ee7a m\u00ecnh \u0111\u1ebfn tr\u00ecnh duy\u1ec7t. Tr\u00ecnh duy\u1ec7t s\u1ebd ki\u1ec3m tra xem ch\u1ee9ng ch\u1ec9 \u0111\u00f3 c\u00f3 \u0111\u01b0\u1ee3c c\u1ea5p b\u1edfi m\u1ed9t t\u1ed5 ch\u1ee9c c\u1ea5p ch\u1ee9ng ch\u1ec9 \u0111\u00e1ng tin c\u1eady hay kh\u00f4ng, li\u1ec7u ch\u1ee9ng ch\u1ec9 c\u00f3 c\u00f2n hi\u1ec7u l\u1ef1c trong th\u1eddi h\u1ea1n hay kh\u00f4ng, v\u00e0 xem t\u00ean mi\u1ec1n trong ch\u1ee9ng ch\u1ec9 c\u00f3 tr\u00f9ng kh\u1edbp v\u1edbi trang web \u0111ang \u0111\u01b0\u1ee3c truy c\u1eadp hay kh\u00f4ng. Sau khi vi\u1ec7c x\u00e1c th\u1ef1c th\u00e0nh c\u00f4ng, c\u1ea3 hai b\u00ean s\u1ebd s\u1eed d\u1ee5ng c\u01a1 ch\u1ebf kh\u00f3a c\u00f4ng khai v\u00e0 kh\u00f3a ri\u00eang t\u01b0 trong ch\u1ee9ng ch\u1ec9 \u0111\u1ec3 trao \u0111\u1ed5i m\u1ed9t c\u00e1ch an to\u00e0n v\u00e0 t\u1ea1o ra kh\u00f3a m\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng d\u00f9ng cho phi\u00ean truy c\u1eadp hi\u1ec7n t\u1ea1i. T\u1ea5t c\u1ea3 d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n t\u1ea3i sau n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a v\u00e0 gi\u1ea3i m\u00e3 b\u1eb1ng kh\u00f3a \u0111\u1ed1i x\u1ee9ng n\u00e0y.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Algorithms for Encryption and Key Management Systems<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Giao th\u1ee9c SSL\/TLS k\u1ebft h\u1ee3p hi\u1ec7u qu\u1ea3 c\u1ea3 hai c\u00f4ng ngh\u1ec7 m\u00e3 h\u00f3a b\u1ea5t \u0111\u1ed1i x\u1ee9ng v\u00e0 m\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng, t\u1eadn d\u1ee5ng \u01b0u \u0111i\u1ec3m c\u1ee7a t\u1eebng c\u00f4ng ngh\u1ec7 \u0111\u1ec3 b\u00f9 \u0111\u1eafp cho nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a nhau. C\u00f4ng ngh\u1ec7 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) \u0111\u1ec3 trao \u0111\u1ed5i th\u00f4ng tin m\u1ed9t c\u00e1ch an to\u00e0n. \u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a c\u00f4ng ngh\u1ec7 n\u00e0y l\u00e0 s\u1eed d\u1ee5ng m\u1ed9t c\u1eb7p kh\u00f3a: kh\u00f3a c\u00f4ng khai v\u00e0 kh\u00f3a ri\u00eang t\u01b0. Kh\u00f3a c\u00f4ng khai c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1, d\u00f9ng \u0111\u1ec3 m\u00e3 h\u00f3a d\u1eef li\u1ec7u; trong khi kh\u00f3a ri\u00eang t\u01b0 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef b\u00ed m\u1eadt tr\u00ean m\u00e1y ch\u1ee7, d\u00f9ng \u0111\u1ec3 gi\u1ea3i m\u00e3 d\u1eef li\u1ec7u. M\u1eb7c d\u00f9 an to\u00e0n h\u01a1n, nh\u01b0ng qu\u00e1 tr\u00ecnh m\u00e3 h\u00f3a v\u00e0 gi\u1ea3i m\u00e3 t\u01b0\u01a1ng \u0111\u1ed1i ph\u1ee9c t\u1ea1p v\u00e0 di\u1ec5n ra ch\u1eadm h<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng (ch\u1eb3ng h\u1ea1n nh\u01b0 AES) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 m\u00e3 h\u00f3a d\u1eef li\u1ec7u th\u1ef1c t\u1ebf \u0111\u01b0\u1ee3c truy\u1ec1n \u0111i sau khi qu\u00e1 tr\u00ecnh thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i (g\u1ecdi l\u00e0 \u201cgiao ti\u1ebfp kh\u1edfi \u0111\u1ea7u\u201d \u2013 handshake) ho\u00e0n t\u1ea5t. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y s\u1eed d\u1ee5ng c\u00f9ng m\u1ed9t kh\u00f3a \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u1ea3 hai thao t\u00e1c m\u00e3 h\u00f3a v\u00e0 gi\u1ea3i m\u00e3, do \u0111\u00f3 r\u1ea5t hi\u1ec7u qu\u1ea3. M\u1ed9t trong nh\u1eefng vai tr\u00f2 quan tr\u1ecdng c\u1ee7a ch\u1ee9ng ch\u1ec9 SSL l\u00e0 \u0111\u1ea3m b\u1ea3o r\u1eb1ng kh\u00f3a \u0111\u1ed1i x\u1ee9ng n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c truy\u1ec1n t\u1eeb m\u00e1y ch\u1ee7 \u0111\u1ebfn m\u00e1y kh\u00e1ch m\u1ed9t c\u00e1ch an to\u00e0n, th\u00f4ng qua ph\u01b0\u01a1ng th\u1ee9c m\u00e3 h\u00f3a b\u1ea5t \u0111\u1ed1i x\u1ee9ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e1c lo\u1ea1i ch\u1ee9ng ch\u1ec9 SSL ch\u00ednh v\u00e0 c\u00e1ch l\u1ef1a ch\u1ecdn<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">D\u1ef1a tr\u00ean m\u1ee9c \u0111\u1ed9 x\u00e1c th\u1ef1c v\u00e0 ph\u1ea1m vi ch\u1ee9c n\u0103ng, ch\u1ee9ng ch\u1ec9 SSL ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c chia th\u00e0nh ba lo\u1ea1i ch\u00ednh \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u c\u1ee7a c\u00e1c t\u00ecnh hu\u1ed1ng kh\u00e1c nhau.<\/p>\n<!-- AUTO_INTERNAL_LINKS_START --><p>\u0110\u1ecdc th\u00eam <a href=\"https:\/\/www.likacloud.com\/vi\/nl\/knowledge\/ssl-certificate\/ssl-certificate-complete-guide-from-basics-to-deployment\/\">H\u01b0\u1edbng d\u1eabn chi ti\u1ebft v\u1ec1 ch\u1ee9ng ch\u1ec9 SSL: T\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn tri\u1ec3n khai th\u1ef1c t\u1ebf to\u00e0n di\u1ec7n<\/a>\u3002<\/p><!-- AUTO_INTERNAL_LINKS_END -->\n\n\n\n\n<h3 class=\"wp-block-heading\">Ch\u1ee9ng ch\u1ec9 x\u00e1c th\u1ef1c 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. C\u01a1 quan c\u1ea5p ch\u1ee9ng ch\u1ec9 ch\u1ec9 ki\u1ec3m tra quy\u1ec1n s\u1edf h\u1eefu t\u00ean mi\u1ec1n c\u1ee7a ng\u01b0\u1eddi n\u1ed9p \u0111\u01a1n (v\u00ed d\u1ee5: b\u1eb1ng c\u00e1ch xem x\u00e9t c\u00e1c b\u1ea3n ghi gi\u1ea3i quy\u1ebft DNS ho\u1eb7c nh\u1eadn email x\u00e1c th\u1ef1c \u0111\u01b0\u1ee3c g\u1eedi \u0111\u1ebfn \u0111\u1ecba ch\u1ec9 email \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh). N\u00f3 cung c\u1ea5p ch\u1ee9c n\u0103ng m\u00e3 h\u00f3a c\u01a1 b\u1ea3n cho trang web v\u00e0 hi\u1ec3n th\u1ecb bi\u1ec3u t\u01b0\u1ee3ng kh\u00f3a trong thanh \u0111\u1ecba ch\u1ec9 tr\u00ecnh duy\u1ec7t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ee9ng ch\u1ec9 DV r\u1ea5t ph\u00f9 h\u1ee3p cho c\u00e1c trang web c\u00e1 nh\u00e2n, blog, m\u00f4i tr\u01b0\u1eddng th\u1eed nghi\u1ec7m, ho\u1eb7c c\u00e1c n\u1ec1n t\u1ea3ng n\u1ed9i b\u1ed9 kh\u00f4ng y\u00eau c\u1ea7u ph\u1ea3i hi\u1ec3n th\u1ecb th\u00f4ng tin v\u1ec1 danh t\u00ednh t\u1ed5 ch\u1ee9c m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng. H\u1ea1n ch\u1ebf c\u1ee7a n\u00f3 l\u00e0 ch\u1ec9 x\u00e1c th\u1ef1c t\u00ean mi\u1ec1n, ch\u1ee9 kh\u00f4ng x\u00e1c th\u1ef1c th\u00f4ng tin v\u1ec1 c\u00f4ng ty ho\u1eb7c t\u1ed5 ch\u1ee9c v\u1eadn h\u00e0nh trang web \u0111\u00f3.<\/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\">So v\u1edbi c\u00e1c ch\u1ee9ng ch\u1ec9 DV (Domain Validation) ch\u1ec9 x\u00e1c th\u1ef1c t\u00ean mi\u1ec1n, ch\u1ee9ng ch\u1ec9 OV (Organization Validation) c\u00f2n b\u1ed5 sung qu\u00e1 tr\u00ecnh ki\u1ec3m tra nghi\u00eam ng\u1eb7t h\u01a1n v\u1ec1 t\u00ednh x\u00e1c th\u1ef1c v\u00e0 t\u00ednh h\u1ee3p ph\u00e1p c\u1ee7a t\u1ed5 ch\u1ee9c n\u1ed9p \u0111\u01a1n xin c\u1ea5p ch\u1ee9ng ch\u1ec9 (ch\u1eb3ng h\u1ea1n nh\u01b0 c\u00f4ng ty, c\u01a1 quan ch\u00ednh ph\u1ee7). C\u01a1 quan c\u1ea5p ch\u1ee9ng ch\u1ec9 (CA \u2013 Certificate Authority) s\u1ebd ki\u1ec3m tra c\u00e1c t\u00e0i li\u1ec7u \u0111\u0103ng k\u00fd ch\u00ednh th\u1ee9c c\u1ee7a doanh nghi\u1ec7p, s\u1ed1 \u0111i\u1ec7n tho\u1ea1i, v\u00e0 c\u00e1c th\u00f4ng tin kh\u00e1c li\u00ean quan. Th\u00f4ng tin chi ti\u1ebft v\u1ec1 doanh nghi\u1ec7p \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c th\u1ef1c s\u1ebd \u0111\u01b0\u1ee3c ghi trong ch\u1ee9<\/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\">Khi ng\u01b0\u1eddi d\u00f9ng nh\u1ea5p v\u00e0o bi\u1ec3u t\u01b0\u1ee3ng kh\u00f3a \u1edf thanh \u0111\u1ecba ch\u1ec9 tr\u00ecnh duy\u1ec7t \u0111\u1ec3 xem chi ti\u1ebft ch\u1ee9ng ch\u1ec9, h\u1ecd c\u00f3 th\u1ec3 th\u1ea5y th\u00f4ng tin chi ti\u1ebft v\u1ec1 doanh nghi\u1ec7p, \u0111i\u1ec1u n\u00e0y gi\u00fap t\u0103ng \u0111\u00e1ng k\u1ec3 m\u1ee9c \u0111\u1ed9 tin t\u01b0\u1edfng c\u1ee7a h\u1ecd v\u00e0o trang web \u0111\u00f3. Ch\u1ee9ng ch\u1ec9 OV \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i tr\u00ean c\u00e1c trang web ch\u00ednh th\u1ee9c c\u1ee7a doanh nghi\u1ec7p, trang web th\u01b0\u01a1ng m\u1ea1i, c\u0169ng nh\u01b0 c\u00e1c d\u1ecbch v\u1ee5 tr\u1ef1c tuy\u1ebfn c\u1ea7n th\u1ec3 hi\u1ec7n danh t\u00ednh \u0111\u00e1ng tin c\u1eady.<\/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 m\u1ee9c \u0111\u1ed9 x\u00e1c th\u1ef1c ch\u1eb7t ch\u1ebd nh\u1ea5t v\u00e0 \u0111\u1ed9 b\u1ea3o m\u1eadt cao nh\u1ea5t. Ngo\u00e0i vi\u1ec7c th\u1ef1c hi\u1ec7n t\u1ea5t c\u1ea3 c\u00e1c b\u01b0\u1edbc x\u00e1c th\u1ef1c t\u1ed5 ch\u1ee9c \u1edf c\u1ea5p \u0111\u1ed9 OV (Organizational Validation), c\u00e1c t\u1ed5 ch\u1ee9c cung c\u1ea5p ch\u1ee9ng ch\u1ec9 SSL (CA \u2013 Certificate Authorities) c\u00f2n ti\u1ebfn h\u00e0nh c\u00e1c cu\u1ed9c ki\u1ec3m tra s\u00e2u r\u1ed9ng h\u01a1n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng t\u1ed5 ch\u1ee9c \u0111\u00f3 th\u1ef1c s\u1ef1 l\u00e0 m\u1ed9t th\u1ef1c th\u1ec3 h\u1ee3p ph\u00e1p v\u00e0 h\u00e0nh \u0111\u1ed9ng n\u1ed9p \u0111\u01a1n xin c\u1ea5p<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u00ean h\u1ea7u h\u1ebft c\u00e1c tr\u00ecnh duy\u1ec7t hi\u1ec7n \u0111\u1ea1i, c\u00e1c trang web tri\u1ec3n khai ch\u1ee9ng ch\u1ec9 EV (Extended Validation) 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 t\u1ed5 ch\u1ee9c \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c th\u1ef1c b\u1eb1ng ch\u1eef m\u00e0u xanh l\u00e1 trong thanh \u0111\u1ecba ch\u1ec9. \u0110\u00e2y l\u00e0 c\u00e1ch tr\u1ef1c quan \u0111\u1ec3 truy\u1ec1n \u0111\u1ea1t t\u00edn hi\u1ec7u tin c\u1eady \u1edf m\u1ee9c \u0111\u1ed9 cao nh\u1ea5t \u0111\u1ebfn ng\u01b0\u1eddi d\u00f9ng, v\u00e0 th\u01b0\u1eddng \u0111\u01b0\u1ee3c c\u00e1c ng\u00e2n h\u00e0ng, t\u1ed5 ch\u1ee9c t\u00e0i ch\u00ednh, c\u00e1c n\u1ec1n t\u1ea3ng th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed l\u1edbn, c\u0169ng nh\u01b0 b\u1ea5t k\u1ef3 trang web n\u00e0o x\u1eed l\u00fd c\u00e1c giao d\u1ecbch c\u00f3 t\u00ednh nh\u1ea1y c\u1ea3m cao s\u1eed d\u1ee5ng.<\/p>\n<!-- AUTO_INTERNAL_LINKS_START --><p>\u0110\u1ecdc th\u00eam <a href=\"https:\/\/www.likacloud.com\/vi\/nl\/knowledge\/ssl-certificate\/ssl-certificate-buying-deployment-management-guide\/\">Gi\u1ea3i m\u00e3 b\u00ed m\u1eadt c\u1ee7a ch\u1ee9ng ch\u1ec9 SSL: H\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n t\u1eeb vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u1ebfn tri\u1ec3n khai v\u00e0 qu\u1ea3n l\u00fd<\/a>\u3002<\/p><!-- AUTO_INTERNAL_LINKS_END -->\n\n\n\n\n<p class=\"wp-block-paragraph\">Ngo\u00e0i ra, t\u00f9y theo s\u1ed1 l\u01b0\u1ee3ng t\u00ean mi\u1ec1n \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7, c\u00f2n c\u00f3 c\u00e1c lo\u1ea1i ch\u1ee9ng ch\u1ec9 kh\u00e1c nhau nh\u01b0 ch\u1ee9ng ch\u1ec9 cho m\u1ed9t t\u00ean mi\u1ec1n duy nh\u1ea5t, ch\u1ee9ng ch\u1ec9 d\u1ea1ng k\u00fd t\u1ef1 \u0111\u1ea1i di\u1ec7n (* \u2013 wildcard) (b\u1ea3o v\u1ec7 m\u1ed9t t\u00ean mi\u1ec1n c\u00f9ng t\u1ea5t c\u1ea3 c\u00e1c t\u00ean mi\u1ec1n con c\u00f9ng c\u1ea5p), v\u00e0 ch\u1ee9ng ch\u1ec9 cho nhi\u1ec1u t\u00ean mi\u1ec1n, \u0111\u1ec3 ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p v\u1edbi c\u1ea5u tr\u00fac trang web th\u1ef1c t\u1ebf c\u1ee7a m\u00ecnh<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 xin v\u00e0 tri\u1ec3n khai ch\u1ee9ng ch\u1ec9 SSL cho trang web c\u1ee7a b\u1ea1n?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c tri\u1ec3n khai ch\u1ee9ng ch\u1ec9 SSL l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh c\u00f3 h\u1ec7 th\u1ed1ng; t\u1eeb vi\u1ec7c l\u1ef1a ch\u1ecdn ch\u1ee9ng ch\u1ec9 \u0111\u1ebfn qu\u00e1 tr\u00ecnh c\u00e0i \u0111\u1eb7t, m\u1ed7i b\u01b0\u1edbc \u0111\u1ec1u c\u1ea7n \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n m\u1ed9t c\u00e1ch c\u1ea9n th\u1eadn.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Quy tr\u00ecnh n\u1ed9p \u0111\u01a1n v\u00e0 c\u1ea5p 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 t\u1ec7p CSR (Certificate Signing Request) tr\u00ean m\u00e1y ch\u1ee7 web. CSR l\u00e0 y\u00eau c\u1ea7u k\u00fd ch\u1ee9ng ch\u1ec9, trong \u0111\u00f3 ch\u1ee9a kh\u00f3a c\u00f4ng khai c\u1ee7a b\u1ea1n v\u00e0 th\u00f4ng tin t\u1ed5 ch\u1ee9c li\u00ean quan. Khi t\u1ea1o CSR, h\u1ec7 th\u1ed1ng c\u0169ng s\u1ebd t\u1ef1 \u0111\u1ed9ng t\u1ea1o ra kh\u00f3a ri\u00eang t\u01b0\u01a1ng \u1ee9ng; kh\u00f3a n\u00e0y ph\u1ea3i \u0111\u01b0\u1ee3c b\u1ea3o m\u1eadt m\u1ed9t c\u00e1ch nghi\u00eam ng\u1eb7t tr\u00ean m\u00e1y ch\u1ee7.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sau \u0111\u00f3, h\u00e3y g\u1eedi t\u1ec7p CSR n\u00e0y \u0111\u1ebfn c\u01a1 quan c\u1ea5p ch\u1ee9ng ch\u1ec9 (Certificate Authority \u2013 CA) m\u00e0 b\u1ea1n \u0111\u00e3 ch\u1ecdn. T\u00f9y thu\u1ed9c v\u00e0o lo\u1ea1i ch\u1ee9ng ch\u1ec9 m\u00e0 b\u1ea1n y\u00eau c\u1ea7u, CA s\u1ebd b\u1eaft \u0111\u1ea7u qu\u00e1 tr\u00ecnh x\u00e1c th\u1ef1c t\u00ean mi\u1ec1n ho\u1eb7c t\u1ed5 ch\u1ee9c t\u01b0\u01a1ng \u1ee9ng. Sau khi qu\u00e1 tr\u00ecnh x\u00e1c th\u1ef1c \u0111\u01b0\u1ee3c ho\u00e0n t\u1ea5t, CA s\u1ebd c\u1ea5p t\u1ec7p ch\u1ee9ng ch\u1ec9 SSL (th\u01b0\u1eddng c\u00f3 \u0111\u1ecbnh d\u1ea1ng.crt ho\u1eb7c.pem) v\u00e0 g\u1eedi n\u00f3 cho b\u1ea1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e0i \u0111\u1eb7t v\u00e0 c\u1ea5u h\u00ecnh m\u00e1y ch\u1ee7<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sau khi nh\u1eadn \u0111\u01b0\u1ee3c t\u1ec7p ch\u1ee9ng ch\u1ec9, b\u1ea1n c\u1ea7n c\u00e0i \u0111\u1eb7t n\u00f3 c\u00f9ng v\u1edbi kh\u00f3a ri\u00eang (private key) \u0111\u00e3 \u0111\u01b0\u1ee3c t\u1ea1o tr\u01b0\u1edbc \u0111\u00f3 v\u00e0o ph\u1ea7n m\u1ec1m m\u00e1y ch\u1ee7 web nh\u01b0 Apache, Nginx, IIS, v.v. Qu\u00e1 tr\u00ecnh c\u1ea5u h\u00ecnh bao g\u1ed3m vi\u1ec7c s\u1eeda \u0111\u1ed5i t\u1ec7p c\u1ea5u h\u00ecnh c\u1ee7a m\u00e1y ch\u1ee7, ch\u1ec9 \u0111\u1ecbnh \u0111\u01b0\u1eddng d\u1eabn t\u1edbi t\u1ec7p ch\u1ee9ng ch\u1ec9 v\u00e0 kh\u00f3a ri\u00eang, v\u00e0 thi\u1ebft l\u1eadp m\u00e1y ch\u1ee7 \u0111\u1ec3 l\u1eafng nghe tr\u00ean c\u1ed5ng 443.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sau khi qu\u00e1 tr\u00ecnh c\u00e0i \u0111\u1eb7t ho\u00e0n t\u1ea5t, h\u00e3y nh\u1edb s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 tr\u1ef1c tuy\u1ebfn ho\u1eb7c d\u00f2ng l\u1ec7nh \u0111\u1ec3 ki\u1ec3m tra xem ch\u1ee9ng ch\u1ec9 \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t \u0111\u00fang c\u00e1ch ch\u01b0a, chu\u1ed7i li\u00ean k\u1ebft (certificate chain) c\u00f3 ho\u00e0n ch\u1ec9nh kh\u00f4ng, v\u00e0 vi\u1ec7c chuy\u1ec3n h\u01b0\u1edbng t\u1ef1 \u0111\u1ed9ng sang giao th\u1ee9c HTTPS c\u00f3 \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh \u0111\u00fang hay kh\u00f4ng. Cu\u1ed1i c\u00f9ng, h\u00e3y c\u1eadp nh\u1eadt t\u1ea5t c\u1ea3 c\u00e1c li\u00ean k\u1ebft b\u00ean trong trang web, c\u00e1c t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng (nh\u01b0 h\u00ecnh \u1ea3nh, CSS, JS), c\u0169ng nh\u01b0 b\u1ea3n \u0111\u1ed3 trang web (site map) \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng ch\u00fang \u0111\u1ec1u b\u1eaft \u0111\u1ea7u b\u1eb1ng \u201chttps:\/\/\u201d. \u0110i\u1ec1u n\u00e0y s\u1ebd gi\u00fap tr\u00e1nh \u0111\u01b0\u1ee3c c\u00e1c c\u1ea3nh b\u00e1o v\u1ec1 \u201cn\u1ed9i dung h\u1ed7n h\u1ee3p\u201d (mixed content).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">B\u1ea3o tr\u00ec v\u00e0 th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t cho 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 b\u1ea3o tr\u00ec v\u00e0 qu\u1ea3n l\u00fd ch\u00fang th\u01b0\u1eddng xuy\u00ean m\u1edbi l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an ninh lu\u00f4n \u0111\u01b0\u1ee3c duy tr\u00ec \u1edf m\u1ee9c hi\u1ec7u qu\u1ea3 cao.<\/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\">M\u1ed7i ch\u1ee9ng ch\u1ec9 SSL \u0111\u1ec1u c\u00f3 th\u1eddi h\u1ea1n s\u1eed d\u1ee5ng c\u1ee5 th\u1ec3, v\u00e0 hi\u1ec7n nay, th\u1eddi h\u1ea1n s\u1eed d\u1ee5ng t\u1ed1i \u0111a c\u1ee7a c\u00e1c ch\u1ee9ng ch\u1ec9 do c\u00e1c t\u1ed5 ch\u1ee9c c\u1ea5p ch\u1ee9ng ch\u1ec9 (CA) ph\u1ed5 bi\u1ebfn c\u1ea5p l\u00e0 m\u1ed9t n\u0103m. B\u1ea1n ph\u1ea3i ho\u00e0n t\u1ea5t th\u1ee7 t\u1ee5c gia h\u1ea1n v\u00e0 thay th\u1ebf ch\u1ee9ng ch\u1ec9 tr\u01b0\u1edbc khi n\u00f3 h\u1ebft h\u1ea1n; n\u1ebfu kh\u00f4ng, trang web s\u1ebd hi\u1ec3n th\u1ecb c\u1ea3nh b\u00e1o b\u1ea3o m\u1eadt, khi\u1ebfn ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng th\u1ec3 truy c\u1eadp v\u00e0o trang web \u0111\u00f3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec1 ngh\u1ecb thi\u1ebft l\u1eadp c\u01a1 ch\u1ebf gi\u00e1m s\u00e1t h\u1ea1n s\u1eed d\u1ee5ng c\u1ee7a c\u00e1c ch\u1ee9ng ch\u1ec9, s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 gi\u00e1m s\u00e1t ch\u1ee9ng ch\u1ec9 ho\u1eb7c thi\u1ebft l\u1eadp l\u1eddi nh\u1eafc tr\u00ean l\u1ecbch \u0111\u1ec3 b\u1eaft \u0111\u1ea7u qu\u00e1 tr\u00ecnh gia h\u1ea1n ch\u1ee9ng ch\u1ec9 \u00edt nh\u1ea5t m\u1ed9t th\u00e1ng tr\u01b0\u1edbc khi ch\u00fang h\u1ebft h\u1ea1n. Nhi\u1ec1u nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef v\u00e0 c\u00e1c t\u1ed5 ch\u1ee9c c\u1ea5p ch\u1ee9ng ch\u1ec9 (CA) c\u0169ng cung c\u1ea5p d\u1ecbch v\u1ee5 gia h\u1ea1n t\u1ef1 \u0111\u1ed9ng, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 gi\u00fap gi\u1ea3m \u0111\u00e1ng k\u1ec3 nguy c\u01a1 d\u1ecbch v\u1ee5 b\u1ecb gi<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u1eadt B\u1ea3o m\u1eadt Truy\u1ec1n t\u1ea3i Nghi\u00eam ng\u1eb7t HTTP<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">HSTS (HTTP Strict Transport Security) l\u00e0 m\u1ed9t ch\u00ednh s\u00e1ch b\u1ea3o m\u1eadt quan tr\u1ecdng. N\u00f3 th\u00f4ng b\u00e1o cho tr\u00ecnh duy\u1ec7t th\u00f4ng qua ti\u00eau \u0111\u1ec1 ph\u1ea3n h\u1ed3i HTTP r\u1eb1ng trong m\u1ed9t kho\u1ea3ng th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh, t\u1ea5t c\u1ea3 c\u00e1c l\u1ea7n truy c\u1eadp v\u00e0o trang web \u0111\u00f3 \u0111\u1ec1u ph\u1ea3i s\u1eed d\u1ee5ng giao th\u1ee9c HTTPS. Ngay c\u1ea3 khi ng\u01b0\u1eddi d\u00f9ng nh\u1eadp \u0111\u1ecba ch\u1ec9 trang web th\u1ee7 c\u00f4ng.<code data-no-auto-translation=\"\">http:\/\/<\/code>Tr\u00ecnh duy\u1ec7t c\u0169ng s\u1ebd t\u1ef1 \u0111\u1ed9ng chuy\u1ec3n \u0111\u1ed5i sang phi\u00ean b\u1ea3n ph\u00f9 h\u1ee3p.<code data-no-auto-translation=\"\">https:\/\/<\/code>V\u00e0 n\u00f3 c\u00f3 th\u1ec3 ph\u00f2ng ng\u1eeba hi\u1ec7u qu\u1ea3 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng c\u1ee7a k\u1ebb trung gian nh\u01b0 vi\u1ec7c \u201cb\u00f3c t\u00e1ch\u201d th\u00f4ng tin SSL (SSL stripping).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c k\u00edch ho\u1ea1t HSTS (HTTP Strict Transport Security) c\u00f3 th\u1ec3 n\u00e2ng cao th\u00eam m\u1ee9c \u0111\u1ed9 b\u1ea3o m\u1eadt c\u1ee7a trang web. B\u1ea1n c\u00f3 th\u1ec3 b\u1eadt t\u00ednh n\u0103ng n\u00e0y b\u1eb1ng c\u00e1ch th\u00eam c\u00e1c ti\u00eau \u0111\u1ec1 HTTP t\u01b0\u01a1ng \u1ee9ng v\u00e0o c\u1ea5u h\u00ecnh m\u00e1y ch\u1ee7.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Theo d\u00f5i s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00e1c giao th\u1ee9c m\u00e3 h\u00f3a<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ef1 ti\u1ebfn b\u1ed9 c\u1ee7a c\u00f4ng ngh\u1ec7 c\u0169ng \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c c\u00e1c ti\u00eau chu\u1ea9n c\u0169 s\u1ebd b\u1ecb lo\u1ea1i b\u1ecf. C\u1ea7n \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c m\u00e1y ch\u1ee7 t\u1eaft b\u1ecf nh\u1eefng giao th\u1ee9c \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ee9ng minh l\u00e0 kh\u00f4ng an to\u00e0n (nh\u01b0 SSL 2.0, SSL 3.0) c\u0169ng nh\u01b0 c\u00e1c b\u1ed9 m\u00e3 h\u00f3a y\u1ebfu. Hi\u1ec7n nay, khuy\u1ebfn ngh\u1ecb c\u1ea5u h\u00ecnh m\u00e1y ch\u1ee7 \u0111\u1ec3 \u01b0u ti\u00ean h\u1ed7 tr\u1ee3 c\u00e1c giao th\u1ee9c TLS 1.2 v\u00e0 TLS 1.3, v\u00ec ch\u00fang mang l\u1ea1i m\u1ee9c \u0111\u1ed9 b\u1ea3o m\u1eadt cao h\u01a1n v\u00e0 hi\u1ec7u n\u0103ng t\u1ed1t h\u01a1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c ki\u1ec3m tra v\u00e0 c\u1eadp nh\u1eadt \u0111\u1ecbnh k\u1ef3 c\u1ea5u h\u00ecnh SSL\/TLS tr\u00ean m\u00e1y ch\u1ee7, tu\u00e2n theo c\u00e1c th\u1ef1c ti\u1ec5n b\u1ea3o m\u1eadt t\u1ed1t nh\u1ea5t trong ng\u00e0nh, l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 kh\u00f4ng th\u1ec3 thi\u1ebfu \u0111\u1ec3 ch\u1ed1ng l\u1ea1i c\u00e1c lo\u1ea1i t\u1ea5n c\u00f4ng m\u1edbi v\u00e0 b\u1ea3o v\u1ec7 an to\u00e0n d\u1eef li\u1ec7u.<\/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 n\u1ec1n t\u1ea3ng c\u01a1 b\u1ea3n \u0111\u1ec3 x\u00e2y d\u1ef1ng m\u1ed9t m\u00f4i tr\u01b0\u1eddng Internet an to\u00e0n v\u00e0 \u0111\u00e1ng tin c\u1eady. Ch\u00fang b\u1ea3o v\u1ec7 quy\u1ec1n ri\u00eang t\u01b0 c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a trang web b\u1eb1ng c\u00e1ch m\u00e3 h\u00f3a d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n t\u1ea3i c\u0169ng nh\u01b0 x\u00e1c th\u1ef1c danh t\u00ednh c\u1ee7a m\u00e1y ch\u1ee7. T\u1eeb c\u00e1c ch\u1ee9ng ch\u1ec9 DV c\u01a1 b\u1ea3n \u0111\u1ebfn c\u00e1c ch\u1ee9ng ch\u1ec9 EV cung c\u1ea5p m\u1ee9c \u0111\u1ed9 tin c\u1eady cao nh\u1ea5t, nhi\u1ec1u lo\u1ea1i ch\u1ee9ng ch\u1ec9 kh\u00e1c nhau mang l\u1ea1i c\u00e1c gi\u1ea3i ph\u00e1p b\u1ea3o m\u1eadt ph\u00f9 h\u1ee3p v\u1edbi t\u1eebng lo\u1ea1i trang web. Sau khi tri\u1ec3n khai ch\u1ee9ng ch\u1ec9 m\u1ed9t c\u00e1ch th\u00e0nh c\u00f4ng, vi\u1ec7c qu\u1ea3n l\u00fd v\u00f2ng \u0111\u1eddi c\u1ee7a ch\u00fang m\u1ed9t c\u00e1ch ch\u1eb7t ch\u1ebd, c\u00f9ng v\u1edbi vi\u1ec7c \u00e1p d\u1ee5ng c\u00e1c chi\u1ebfn l\u01b0\u1ee3c b\u1ea3o m\u1eadt n\u00e2ng cao nh\u01b0 HSTS, l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 x\u00e2y d\u1ef1ng m\u1ed9t \u201cl\u00e1 ch\u1eafn b\u1ea3o m\u1eadt\u201d v\u1eefng ch\u1eafc. Trong b\u1ed1i c\u1ea3nh an ninh m\u1ea1ng ng\u00e0y c\u00e0ng \u0111\u01b0\u1ee3c ch\u00fa tr\u1ecdng, vi\u1ec7c k\u00edch ho\u1ea1t HTTPS cho trang web kh\u00f4ng c\u00f2n l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn, m\u00e0 l\u00e0 m\u1ed9t y\u00eau c\u1ea7u b\u1eaft bu\u1ed9c.<\/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\">Li\u1ec7u c\u00f3 c\u1ea7n thi\u1ebft ph\u1ea3i c\u00e0i \u0111\u1eb7t ch\u1ee9ng ch\u1ec9 SSL cho blog c\u00e1 nh\u00e2n nh\u1ecf c\u1ee7a t\u00f4i kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y r\u1ea5t c\u1ea7n thi\u1ebft. Hi\u1ec7n nay, c\u00e1c tr\u00ecnh duy\u1ec7t ph\u1ed5 bi\u1ebfn nh\u01b0 Chrome v\u00e0 Firefox \u0111\u1ec1u \u0111\u00e1nh d\u1ea5u t\u1ea5t c\u1ea3 c\u00e1c trang web s\u1eed d\u1ee5ng giao th\u1ee9c HTTP l\u00e0 \u201ckh\u00f4ng an to\u00e0n\u201d, \u0111i\u1ec1u n\u00e0y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u1ee9c \u0111\u1ed9 tin t\u01b0\u1edfng v\u00e0 s\u1ef1 mong mu\u1ed1n \u1edf l\u1ea1i trang web c\u1ee7a ng\u01b0\u1eddi truy c\u1eadp. Ngo\u00e0i ra, c\u00e1c c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm nh\u01b0 Google coi vi\u1ec7c s\u1eed d\u1ee5ng giao th\u1ee9c HTTPS l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 t\u00edch c\u1ef1c trong vi\u1ec7c x\u1ebfp h\u1ea1ng k\u1ebft qu\u1ea3 t\u00ecm ki\u1ebfm. Nhi\u1ec1u nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef web c\u0169ng cung c\u1ea5p ch\u1ee9ng ch\u1ec9 SSL mi\u1ec5n ph\u00ed, gi\u00fap vi\u1ec7c b\u1eadt giao th\u1ee9c HTTPS cho blog c\u00e1 nh\u00e2n tr\u1edf n\u00ean g\u1ea7n nh\u01b0 kh\u00f4ng t\u1ed1n k\u00e9m v\u1ec1 chi ph\u00ed v\u00e0 kh\u00f4ng \u0111\u00f2i h\u1ecfi ki\u1ebfn th\u1ee9c k\u1ef9 thu\u1eadt.<\/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\u662f\u57df\u540d\u9a8c\u8bc1\u578b\u8bc1\u4e66\uff0c\u80fd\u63d0\u4f9b\u4e0e\u4ed8\u8d39DV\u8bc1\u4e66\u76f8\u540c\u5f3a\u5ea6\u7684\u52a0\u5bc6\u529f\u80fd\uff0c\u975e\u5e38\u9002\u5408\u4e2a\u4eba\u548c\u5c0f\u5fae\u9879\u76ee\u3002\u4e24\u8005\u7684\u6838\u5fc3\u533a\u522b\u5728\u4e8e\u4fdd\u969c\u3001\u529f\u80fd\u548c\u652f\u6301\u3002\u4ed8\u8d39\u8bc1\u4e66\u901a\u5e38\u63d0\u4f9b\u66f4\u9ad8\u989d\u5ea6\u7684 warranty liability\uff0c\u5728\u8bc1\u4e66\u9519\u8bef\u5bfc\u81f4\u635f\u5931\u65f6\u63d0\u4f9b\u8d54\u507f\uff0c\u5e76\u5305\u542b\u66f4\u5168\u9762\u7684\u6280\u672f\u652f\u6301\u670d\u52a1\u3002\u4ed8\u8d39\u7684OV\u548cEV\u8bc1\u4e66\u5219\u80fd\u63d0\u4f9b\u514d\u8d39\u8bc1\u4e66\u6240\u6ca1\u6709\u7684\u7ec4\u7ec7\u8eab\u4efd\u9a8c\u8bc1\uff0c\u589e\u5f3a\u4f01\u4e1a\u53ef\u4fe1\u5ea6\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 t\u1ea3i trang web c\u1ee7a t\u00f4i kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1ec1 m\u1eb7t l\u00fd thuy\u1ebft, do c\u1ea7n th\u1ef1c hi\u1ec7n c\u00e1c thao t\u00e1c giao ti\u1ebfp SSL v\u00e0 c\u00e1c ph\u00e9p m\u00e3 h\u00f3a\/gi\u1ea3i m\u00e3 d\u1eef li\u1ec7u, s\u1ebd c\u00f3 s\u1ef1 ch\u1eadm tr\u1ec5 nh\u1ecf x\u1ea3y ra. Tuy nhi\u00ean, tr\u00ean th\u1ef1c t\u1ebf, t\u00e1c \u0111\u1ed9ng n\u00e0y g\u1ea7n nh\u01b0 kh\u00f4ng \u0111\u00e1ng k\u1ec3; th\u1eadm ch\u00ed v\u1edbi c\u00e1c bi\u1ec7n ph\u00e1p t\u1ed1i \u01b0u h\u00f3a (nh\u01b0 k\u00edch ho\u1ea1t TLS 1.3, kh\u00f4i ph\u1ee5c th\u00f4ng tin phi\u00ean giao d\u1ecbch, v.v.), trang web s\u1eed d\u1ee5ng HTTPS c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng nhanh h\u01a1n so v\u1edbi trang web HTTP. \u0110\u1eb7c bi\u1ec7t l\u00e0 khi giao th\u1ee9c HTTP\/2 y\u00eau c\u1ea7u s\u1eed d\u1ee5ng HTTPS, c\u00e1c t\u00ednh n\u0103ng nh\u01b0 \u0111a lu\u1ed3ng (multiplexing) c\u1ee7a HTTP\/2 c\u00f3 th\u1ec3 gi\u00fap c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 t\u1ed1c \u0111\u1ed9 t\u1ea3i trang. Do \u0111\u00f3, l\u1ee3i \u00edch v\u1ec1 m\u1eb7t b\u1ea3o m\u1eadt v\u00e0 s\u1ef1 tin t\u01b0\u1edfng m\u00e0 HTTPS mang l\u1ea1i v\u01b0\u1ee3t xa nh\u1eefng t\u1ed5n th\u1ea5t v\u1ec1 hi\u1ec7u n\u0103ng c\u00f3 th\u1ec3 x\u1ea3y ra, nh\u1eefng t\u1ed5n th\u1ea5t n\u00e0y ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c kh\u1eafc ph\u1ee5c th\u00f4ng qua c\u00e1c bi\u1ec7n ph\u00e1p t\u1ed1i \u01b0u h\u00f3a.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">T\u00f4i \u0111\u00e3 c\u00f3 ch\u1ee9ng ch\u1ec9 SSL r\u1ed3i, t\u1ea1i sao tr\u00ecnh duy\u1ec7t v\u1eabn hi\u1ec3n th\u1ecb th\u00f4ng b\u00e1o \u201ckh\u00f4ng an to\u00e0n\u201d?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f3 m\u1ed9t s\u1ed1 l\u00fd do khi\u1ebfn t\u00ecnh tr\u1ea1ng n\u00e0y x\u1ea3y ra. Nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 do v\u1ea5n \u0111\u1ec1 \u201cn\u1ed9i dung h\u1ed7n h\u1ee3p\u201d (mixed content): m\u1eb7c d\u00f9 trang web \u0111\u01b0\u1ee3c t\u1ea3i th\u00f4ng qua giao th\u1ee9c HTTPS, nh\u01b0ng c\u00e1c t\u00e0i nguy\u00ean nh\u01b0 h\u00ecnh \u1ea3nh, script, ho\u1eb7c b\u1ea3ng \u0111\u1ecbnh d\u1ea1ng (style sheets) l\u1ea1i s\u1eed d\u1ee5ng giao th\u1ee9c HTTP. \u0110i\u1ec1u n\u00e0y khi\u1ebfn to\u00e0n b\u1ed9 trang web b\u1ecb coi l\u00e0 kh\u00f4ng an to\u00e0n. B\u1ea1n c\u1ea7n ki\u1ec3m tra v\u00e0 thay \u0111\u1ed5i t\u1ea5t c\u1ea3 c\u00e1c li\u00ean k\u1ebft \u0111\u1ebfn c\u00e1c t\u00e0i nguy\u00ean \u0111\u00f3 \u0111\u1ec3 ch\u00fang s\u1eed d\u1ee5ng giao th\u1ee9c HTTPS.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ngo\u00e0i ra, c\u00e1c t\u00ecnh tr\u1ea1ng nh\u01b0 ch\u1ee9ng ch\u1ec9 h\u1ebft h\u1ea1n, chu\u1ed7i ch\u1ee9ng ch\u1ec9 kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7 (kh\u00f4ng ch\u1ee9a c\u00e1c ch\u1ee9ng ch\u1ec9 trung gian), t\u00ean mi\u1ec1n c\u1ee7a ch\u1ee9ng ch\u1ec9 kh\u00f4ng tr\u00f9ng kh\u1edbp v\u1edbi t\u00ean mi\u1ec1n \u0111\u01b0\u1ee3c truy c\u1eadp, ho\u1eb7c c\u1ea5u h\u00ecnh m\u00e1y ch\u1ee7 sai l\u1ea7m \u0111\u1ec1u c\u00f3 th\u1ec3 g\u00e2y ra c\u1ea3nh b\u00e1o b\u1ea3o m\u1eadt. B\u1ea1n n\u00ean s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 ph\u00e1t tri\u1ec3n t\u00edch h\u1ee3p s\u1eb5n trong tr\u00ecnh duy\u1ec7t ho\u1eb7c c\u00e1c c\u00f4ng c\u1ee5 ki\u1ec3m tra SSL tr\u1ef1c tuy\u1ebfn \u0111\u1ec3 ch\u1ea9n \u0111o\u00e1n v\u1ea5n \u0111\u1ec1.<\/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 qua giao th\u1ee9c HTTPS v\u00e0 b\u1ea3o v\u1ec7 an to\u00e0n qu\u00e1 tr\u00ecnh truy\u1ec1n t\u1ea3i d\u1eef li\u1ec7u tr\u00ean trang web. B\u00e0i vi\u1ebft ph\u00e2n t\u00edch chi ti\u1ebft qu\u00e1 tr\u00ecnh k\u1ebft n\u1ed1i (handshake) gi\u1eefa SSL\/TLS c\u0169ng nh\u01b0 nguy\u00ean l\u00fd m\u00e3 h\u00f3a, \u0111\u1ed3ng th\u1eddi so s\u00e1nh c\u00e1c lo\u1ea1i ch\u1ee9ng ch\u1ec9 kh\u00e1c nhau nh\u01b0 DV, OV, EV v\u1ec1 m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng. Ngo\u00e0i ra, b\u00e0i vi\u1ebft cung c\u1ea5p h\u01b0\u1edbng d\u1eabn \u0111\u1ea7y \u0111\u1ee7 t\u1eeb kh\u00e2u n\u1ed9p \u0111\u01a1n xin c\u1ea5p ch\u1ee9ng ch\u1ec9, x\u00e1c th\u1ef1c th\u00f4ng tin \u0111\u1ebfn kh\u00e2u c\u00e0i \u0111\u1eb7t tr\u00ean m\u00e1y ch\u1ee7, nh\u1eb1m gi\u00fap ch\u1ee7 s\u1edf h\u1eefu trang web x\u00e2y d\u1ef1ng m\u1ed9t \u201cl\u1edbp b\u1ea3o v\u1ec7\u201d an to\u00e0n, t\u1eeb \u0111\u00f3 t\u0103ng c\u01b0\u1eddng s\u1ef1 tin t\u01b0\u1edfng c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 c\u1ea3i thi\u1ec7n th\u1ee9 h\u1ea1ng trang web tr\u00ean c\u00e1c c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm<\/p>","protected":false},"author":7,"featured_media":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"tags":[341,11,2954,358,338],"knowledge_category":[277],"class_list":["post-12372590","knowledge_post","type-knowledge_post","status-publish","hentry","tag-https-encryption","tag-ssl-certificate","tag-data-protection","tag-server-security","tag-cybersecurity","knowledge_category-ssl-certificate"],"acf":{"site_seo_keywords":"SSL\u8bc1\u4e66,HTTPS\u52a0\u5bc6,\u7f51\u7ad9\u5b89\u5168,SSL\/TLS\u63e1\u624b,\u8bc1\u4e66\u7c7b\u578b,OV\u8bc1\u4e66,EV\u8bc1\u4e66,SSL\u8bc1\u4e66\u7533\u8bf7\u90e8\u7f72"},"_links":{"self":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_posts\/12372590","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\/12372590\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/media?parent=12372590"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/tags?post=12372590"},{"taxonomy":"knowledge_category","embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_category?post=12372590"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}