{"id":2096,"date":"2025-10-07T22:04:49","date_gmt":"2025-10-07T15:04:49","guid":{"rendered":"https:\/\/kienthucmo.com\/?p=2096"},"modified":"2026-01-24T22:40:48","modified_gmt":"2026-01-24T15:40:48","slug":"ssl-tls-va-vai-tro-cot-loi-trong-bao-mat-thong-tin-tren-internet","status":"publish","type":"post","link":"https:\/\/kienthucmo.com\/vi\/ssl-tls-va-vai-tro-cot-loi-trong-bao-mat-thong-tin-tren-internet\/","title":{"rendered":"SSL\/TLS v\u00e0 Vai Tr\u00f2 C\u1ed1t L\u00f5i Trong B\u1ea3o M\u1eadt Th\u00f4ng Tin Tr\u00ean Internet"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Trong th\u1ebf gi\u1edbi tr\u1ef1c tuy\u1ebfn, m\u1ed7i khi b\u1ea1n nh\u1eadp m\u1eadt kh\u1ea9u, thanh to\u00e1n, hay g\u1eedi m\u1ed9t bi\u1ec3u m\u1eabu, d\u1eef li\u1ec7u c\u1ee7a b\u1ea1n \u0111ang th\u1ef1c hi\u1ec7n m\u1ed9t \u201cchuy\u1ebfn \u0111i\u201d qua nhi\u1ec1u m\u00e1y ch\u1ee7, router v\u00e0 c\u1ed5ng m\u1ea1ng. C\u00e2u h\u1ecfi \u0111\u1eb7t ra l\u00e0: <em>Ai c\u00f3 th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c n\u1ed9i dung \u0111\u00f3?<\/em><br>\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o chuy\u1ebfn \u0111i \u1ea5y an to\u00e0n, c\u00f4ng ngh\u1ec7 <strong>SSL\/TLS<\/strong> ra \u0111\u1eddi \u2014 nh\u01b0 m\u1ed9t h\u1ec7 th\u1ed1ng m\u00e3 h\u00f3a th\u00f4ng minh gi\u00fap th\u00f4ng tin \u0111\u1ebfn n\u01a1i m\u00e0 kh\u00f4ng b\u1ecb \u0111\u00e1nh c\u1eafp hay thay \u0111\u1ed5i.<br>Trong b\u00e0i vi\u1ebft n\u00e0y, m\u00ecnh v\u00e0 b\u1ea1n s\u1ebd c\u00f9ng nhau kh\u00e1m ph\u00e1 c\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a SSL\/TLS, hi\u1ec3u c\u00e1ch n\u00f3 b\u1ea3o v\u1ec7 ng\u01b0\u1eddi d\u00f9ng, v\u00e0 t\u00ecm ra c\u00e1ch tri\u1ec3n khai th\u1ef1c t\u1ebf cho website ho\u1eb7c \u1ee9ng d\u1ee5ng. M\u00ecnh tin r\u1eb1ng khi hi\u1ec3u r\u00f5, ch\u00fang ta s\u1ebd th\u1ea5y HTTPS kh\u00f4ng ch\u1ec9 l\u00e0 \u201c\u1ed5 kh\u00f3a nh\u1ecf tr\u00ean thanh \u0111\u1ecba ch\u1ec9\u201d, m\u00e0 l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a ni\u1ec1m tin s\u1ed1.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"275\" height=\"183\" src=\"https:\/\/kienthucmo.com\/wp-content\/uploads\/tls-ssl.png\" alt=\"SSL\/TLS\" class=\"wp-image-2099\" style=\"width:619px;height:auto\"\/><figcaption class=\"wp-element-caption\">SSL\/TLS<\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">1. SSL\/TLS l\u00e0 g\u00ec?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">SSL (Secure Sockets Layer) v\u00e0 TLS (Transport Layer Security) l\u00e0 hai giao th\u1ee9c b\u1ea3o m\u1eadt \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u trong qu\u00e1 tr\u00ecnh truy\u1ec1n gi\u1eefa tr\u00ecnh duy\u1ec7t (client) v\u00e0 m\u00e1y ch\u1ee7 (server). Ch\u00fang gi\u00fap \u0111\u1ea3m b\u1ea3o r\u1eb1ng th\u00f4ng tin &#8211;  nh\u01b0 m\u1eadt kh\u1ea9u, s\u1ed1 th\u1ebb t\u00edn d\u1ee5ng ho\u1eb7c n\u1ed9i dung tin nh\u1eafn &#8211;  kh\u00f4ng b\u1ecb nghe l\u00e9n, ch\u1ec9nh s\u1eeda ho\u1eb7c gi\u1ea3 m\u1ea1o khi \u0111i qua m\u1ea1ng Internet.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1ec1 b\u1ea3n ch\u1ea5t, SSL\/TLS t\u1ea1o ra m\u1ed9t k\u00eanh truy\u1ec1n th\u00f4ng \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a, trong \u0111\u00f3 m\u1ecdi d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c \u201cg\u00f3i\u201d l\u1ea1i th\u00e0nh d\u1ea1ng kh\u00f4ng th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c \u0111\u1ed1i v\u1edbi b\u1ea5t k\u1ef3 ai ngo\u00e0i ng\u01b0\u1eddi g\u1eedi v\u00e0 ng\u01b0\u1eddi nh\u1eadn h\u1ee3p l\u1ec7. N\u1ebfu ai \u0111\u00f3 ch\u1eb7n \u0111\u01b0\u1ee3c d\u1eef li\u1ec7u gi\u1eefa \u0111\u01b0\u1eddng, th\u1ee9 h\u1ecd th\u1ea5y ch\u1ec9 l\u00e0 nh\u1eefng chu\u1ed7i k\u00fd t\u1ef1 v\u00f4 ngh\u0129a.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ba m\u1ee5c ti\u00eau c\u1ed1t l\u00f5i c\u1ee7a SSL\/TLS g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Confidentiality (B\u1ea3o m\u1eadt):<\/strong> <br>D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a b\u1eb1ng c\u00e1c thu\u1eadt to\u00e1n nh\u01b0 AES, RSA ho\u1eb7c ChaCha20, gi\u00fap ng\u01b0\u1eddi ngo\u00e0i kh\u00f4ng th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c n\u1ed9i dung th\u1ef1c s\u1ef1.<\/li>\n\n\n\n<li><strong>Integrity (To\u00e0n v\u1eb9n):<\/strong> <br>Giao th\u1ee9c s\u1eed d\u1ee5ng m\u00e3 ki\u1ec3m tra (MAC \u2013 Message Authentication Code) \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u kh\u00f4ng b\u1ecb thay \u0111\u1ed5i trong qu\u00e1 tr\u00ecnh truy\u1ec1n. N\u1ebfu c\u00f3 b\u1ea5t k\u1ef3 thay \u0111\u1ed5i n\u00e0o, h\u1ec7 th\u1ed1ng s\u1ebd ph\u00e1t hi\u1ec7n v\u00e0 h\u1ee7y b\u1ecf k\u1ebft n\u1ed1i.<\/li>\n\n\n\n<li><strong>Authentication (X\u00e1c th\u1ef1c):<\/strong><br>SSL\/TLS s\u1eed d\u1ee5ng ch\u1ee9ng ch\u1ec9 s\u1ed1 (Digital Certificate) \u0111\u1ec3 x\u00e1c minh danh t\u00ednh m\u00e1y ch\u1ee7, \u0111\u1ea3m b\u1ea3o ng\u01b0\u1eddi d\u00f9ng \u0111ang giao ti\u1ebfp \u0111\u00fang v\u1edbi website th\u1eadt ch\u1ee9 kh\u00f4ng ph\u1ea3i trang gi\u1ea3 m\u1ea1o.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1ec1 l\u1ecbch s\u1eed, <strong>TLS<\/strong> l\u00e0 phi\u00ean b\u1ea3n k\u1ebf th\u1eeba c\u1ee7a <strong>SSL<\/strong>, \u0111\u01b0\u1ee3c c\u1ea3i ti\u1ebfn \u0111\u1ec3 t\u0103ng t\u00ednh b\u1ea3o m\u1eadt v\u00e0 hi\u1ec7u su\u1ea5t. Sau khi SSL 3.0 b\u1ed9c l\u1ed9 nhi\u1ec1u l\u1ed7 h\u1ed5ng, <strong>TLS <\/strong>1.0 ra \u0111\u1eddi v\u00e0 d\u1ea7n thay th\u1ebf ho\u00e0n to\u00e0n. Hi\u1ec7n nay, <strong>TLS <\/strong>1.3 (\u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a trong <a href=\"https:\/\/datatracker.ietf.org\/doc\/html\/rfc8446?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\">RFC 8446<\/a>) l\u00e0 phi\u00ean b\u1ea3n m\u1edbi nh\u1ea5t, cung c\u1ea5p quy tr\u00ecnh b\u1eaft tay nhanh h\u01a1n, lo\u1ea1i b\u1ecf c\u00e1c thu\u1eadt to\u00e1n y\u1ebfu v\u00e0 t\u0103ng c\u01b0\u1eddng kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i t\u1ea5n c\u00f4ng trung gian (MITM).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00f3i ng\u1eafn g\u1ecdn, SSL\/TLS ch\u00ednh l\u00e0 \u201cl\u00e1 ch\u1eafn b\u1ea3o m\u1eadt\u201d c\u1ee7a Internet hi\u1ec7n \u0111\u1ea1i, gi\u00fap m\u1ecdi giao d\u1ecbch, \u0111\u0103ng nh\u1eadp v\u00e0 trao \u0111\u1ed5i th\u00f4ng tin tr\u1edf n\u00ean \u0111\u00e1ng tin c\u1eady h\u01a1n.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"600\" height=\"309\" src=\"https:\/\/kienthucmo.com\/wp-content\/uploads\/ssl-vs-tls.webp\" alt=\"SSL\/TLS l\u00e0 g\u00ec?\" class=\"wp-image-2097\" srcset=\"https:\/\/kienthucmo.com\/wp-content\/uploads\/ssl-vs-tls.webp 600w, https:\/\/kienthucmo.com\/wp-content\/uploads\/ssl-vs-tls-300x155.webp 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><figcaption class=\"wp-element-caption\">SSL\/TLS<\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">2. C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a SSL\/TLS<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u1ede c\u1ea5p \u0111\u1ed9 t\u1ed5ng quan, SSL\/TLS ho\u1ea1t \u0111\u1ed9ng qua hai giai \u0111o\u1ea1n ch\u00ednh: qu\u00e1 tr\u00ecnh b\u1eaft tay (Handshake) v\u00e0 truy\u1ec1n d\u1eef li\u1ec7u an to\u00e0n (Encrypted Communication).<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Giai \u0111o\u1ea1n handshake gi\u00fap hai b\u00ean x\u00e1c \u0111\u1ecbnh thu\u1eadt to\u00e1n m\u00e3 h\u00f3a, x\u00e1c th\u1ef1c l\u1eabn nhau v\u00e0 t\u1ea1o ra kh\u00f3a phi\u00ean (session key).<\/li>\n\n\n\n<li>Giai \u0111o\u1ea1n ti\u1ebfp theo s\u1eed d\u1ee5ng kh\u00f3a phi\u00ean n\u00e0y \u0111\u1ec3 m\u00e3 h\u00f3a to\u00e0n b\u1ed9 d\u1eef li\u1ec7u truy\u1ec1n \u0111i, \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 hi\u1ec7u su\u1ea5t cao.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Quy tr\u00ecnh Handshake (kh\u00e1i qu\u00e1t):<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>ClientHello:<\/strong> Tr\u00ecnh duy\u1ec7t (client) g\u1eedi th\u00f4ng tin v\u1ec1 phi\u00ean b\u1ea3n TLS, danh s\u00e1ch c\u00e1c thu\u1eadt to\u00e1n m\u00e3 h\u00f3a (cipher suites) m\u00e0 n\u00f3 h\u1ed7 tr\u1ee3, c\u00f9ng m\u1ed9t gi\u00e1 tr\u1ecb ng\u1eabu nhi\u00ean (nonce) \u0111\u1ec3 b\u1eaft \u0111\u1ea7u phi\u00ean.<\/li>\n\n\n\n<li><strong>ServerHello:<\/strong> M\u00e1y ch\u1ee7 ph\u1ea3n h\u1ed3i b\u1eb1ng c\u00e1ch ch\u1ecdn thu\u1eadt to\u00e1n ph\u00f9 h\u1ee3p, g\u1eedi l\u1ea1i nonce c\u1ee7a m\u00ecnh v\u00e0 k\u00e8m theo ch\u1ee9ng ch\u1ec9 s\u1ed1 (X.509) ch\u1ee9a public key \u0111\u1ec3 client x\u00e1c th\u1ef1c.<\/li>\n\n\n\n<li><strong>X\u00e1c th\u1ef1c ch\u1ee9ng ch\u1ec9:<\/strong> Client ki\u1ec3m tra ch\u1ee9ng ch\u1ec9 &#8211; x\u00e1c minh r\u1eb1ng n\u00f3 \u0111\u01b0\u1ee3c c\u1ea5p b\u1edfi CA (Certificate Authority) uy t\u00edn, c\u00f2n h\u1ea1n, v\u00e0 \u0111\u00fang v\u1edbi t\u00ean mi\u1ec1n \u0111ang truy c\u1eadp. N\u1ebfu m\u1ecdi th\u1ee9 h\u1ee3p l\u1ec7, qu\u00e1 tr\u00ecnh ti\u1ebfp t\u1ee5c.<\/li>\n\n\n\n<li><strong>Trao \u0111\u1ed5i kh\u00f3a (Key Exchange):<\/strong> D\u1ef1a v\u00e0o ph\u01b0\u01a1ng th\u1ee9c nh\u01b0 ECDHE (Elliptic Curve Diffie-Hellman Ephemeral), c\u1ea3 hai b\u00ean c\u00f9ng t\u1ea1o ra m\u1ed9t kh\u00f3a phi\u00ean d\u00f9ng chung. Nh\u1edd \u0111\u1eb7c t\u00ednh to\u00e1n h\u1ecdc c\u1ee7a ECDH, ngay c\u1ea3 khi attacker nghe l\u00e9n public key, h\u1ecd c\u0169ng kh\u00f4ng th\u1ec3 suy ra kh\u00f3a b\u00ed m\u1eadt.<\/li>\n\n\n\n<li><strong>M\u00e3 h\u00f3a d\u1eef li\u1ec7u:<\/strong> Khi handshake ho\u00e0n t\u1ea5t, d\u1eef li\u1ec7u b\u1eaft \u0111\u1ea7u \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a b\u1eb1ng thu\u1eadt to\u00e1n \u0111\u1ed1i x\u1ee9ng (nh\u01b0 AES-GCM). Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y nhanh v\u00e0 hi\u1ec7u qu\u1ea3, ph\u00f9 h\u1ee3p cho vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u li\u00ean t\u1ee5c.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>TLS 1.3<\/strong> \u2014 phi\u00ean b\u1ea3n m\u1edbi nh\u1ea5t &#8211;  \u0111\u00e3 r\u00fat g\u1ecdn qu\u00e1 tr\u00ecnh handshake xu\u1ed1ng ch\u1ec9 c\u00f2n 1\u20131.5 v\u00f2ng trao \u0111\u1ed5i (round trip), gi\u00fap t\u0103ng t\u1ed1c \u0111\u1ed9 k\u1ebft n\u1ed1i, lo\u1ea1i b\u1ecf c\u00e1c thu\u1eadt to\u00e1n y\u1ebfu v\u00e0 gi\u1ea3m thi\u1ec3u nguy c\u01a1 t\u1ea5n c\u00f4ng trung gian (MITM).<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"638\" height=\"317\" src=\"https:\/\/kienthucmo.com\/wp-content\/uploads\/llustration-of-SSL-TLS-handshakes-in-a-HTTPS-connection.png\" alt=\"C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a SSL\/TLS\" class=\"wp-image-2103\" srcset=\"https:\/\/kienthucmo.com\/wp-content\/uploads\/llustration-of-SSL-TLS-handshakes-in-a-HTTPS-connection.png 638w, https:\/\/kienthucmo.com\/wp-content\/uploads\/llustration-of-SSL-TLS-handshakes-in-a-HTTPS-connection-300x149.png 300w\" sizes=\"(max-width: 638px) 100vw, 638px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">T\u00f3m l\u1ea1i, public\/private key \u0111\u01b0\u1ee3c d\u00f9ng trong b\u01b0\u1edbc x\u00e1c th\u1ef1c v\u00e0 thi\u1ebft l\u1eadp b\u00ed m\u1eadt ban \u0111\u1ea7u, c\u00f2n session key l\u00e0 \u201cch\u00eca kh\u00f3a t\u1ea1m th\u1eddi\u201d \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 m\u00e3 h\u00f3a to\u00e0n b\u1ed9 d\u1eef li\u1ec7u sau \u0111\u00f3 &#8211;  v\u1eeba \u0111\u1ea3m b\u1ea3o an to\u00e0n, v\u1eeba mang l\u1ea1i t\u1ed1c \u0111\u1ed9 truy\u1ec1n t\u1ea3i t\u1ed1i \u01b0u.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3. C\u00e1c lo\u1ea1i ch\u1ee9ng ch\u1ec9 SSL\/TLS<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ee9ng ch\u1ec9 SSL\/TLS \u0111\u01b0\u1ee3c chia th\u00e0nh nhi\u1ec1u lo\u1ea1i, d\u1ef1a tr\u00ean m\u1ee9c \u0111\u1ed9 x\u00e1c th\u1ef1c (Validation Level) v\u00e0 ph\u1ea1m vi s\u1eed d\u1ee5ng (Scope of Coverage). Vi\u1ec7c hi\u1ec3u r\u00f5 t\u1eebng lo\u1ea1i gi\u00fap m\u00ecnh l\u1ef1a ch\u1ecdn ch\u1ee9ng ch\u1ec9 ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u, quy m\u00f4 v\u00e0 ng\u00e2n s\u00e1ch c\u1ee7a website.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"780\" height=\"380\" src=\"https:\/\/kienthucmo.com\/wp-content\/uploads\/hinhthuc-cacloai-ssl.jpg\" alt=\"C\u00e1c lo\u1ea1i ch\u1ee9ng ch\u1ec9 SSL\/TLS\" class=\"wp-image-2105\" srcset=\"https:\/\/kienthucmo.com\/wp-content\/uploads\/hinhthuc-cacloai-ssl.jpg 780w, https:\/\/kienthucmo.com\/wp-content\/uploads\/hinhthuc-cacloai-ssl-300x146.jpg 300w, https:\/\/kienthucmo.com\/wp-content\/uploads\/hinhthuc-cacloai-ssl-768x374.jpg 768w\" sizes=\"(max-width: 780px) 100vw, 780px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">3.1 Ph\u00e2n lo\u1ea1i theo m\u1ee9c \u0111\u1ed9 x\u00e1c th\u1ef1c (Validation Level)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>DV \u2013 Domain Validation:<\/strong> \u0110\u00e2y l\u00e0 lo\u1ea1i ch\u1ee9ng ch\u1ec9 c\u01a1 b\u1ea3n nh\u1ea5t. T\u1ed5 ch\u1ee9c c\u1ea5p ch\u1ee9ng ch\u1ec9 (CA \u2013 Certificate Authority) ch\u1ec9 c\u1ea7n x\u00e1c minh r\u1eb1ng b\u1ea1n c\u00f3 quy\u1ec1n s\u1edf h\u1eefu t\u00ean mi\u1ec1n th\u00f4ng qua email ho\u1eb7c b\u1ea3n ghi DNS. Vi\u1ec7c c\u1ea5p ph\u00e1t r\u1ea5t nhanh, th\u01b0\u1eddng ch\u1ec9 v\u00e0i ph\u00fat.<br>Ph\u00f9 h\u1ee3p v\u1edbi blog c\u00e1 nh\u00e2n, d\u1ef1 \u00e1n nh\u1ecf ho\u1eb7c website th\u1eed nghi\u1ec7m.<br>V\u00ed d\u1ee5: Let\u2019s Encrypt l\u00e0 CA ph\u1ed5 bi\u1ebfn cung c\u1ea5p ch\u1ee9ng ch\u1ec9 DV mi\u1ec5n ph\u00ed v\u00e0 h\u1ed7 tr\u1ee3 t\u1ef1 \u0111\u1ed9ng gia h\u1ea1n<\/li>\n\n\n\n<li><strong>OV \u2013 Organization Validation:<\/strong> \u1ede c\u1ea5p \u0111\u1ed9 n\u00e0y, CA kh\u00f4ng ch\u1ec9 ki\u1ec3m tra quy\u1ec1n s\u1edf h\u1eefu t\u00ean mi\u1ec1n m\u00e0 c\u00f2n x\u00e1c minh t\u1ed5 ch\u1ee9c ho\u1eb7c doanh nghi\u1ec7p \u0111\u1ee9ng sau website. Ng\u01b0\u1eddi \u0111\u0103ng k\u00fd ph\u1ea3i cung c\u1ea5p c\u00e1c t\u00e0i li\u1ec7u ch\u1ee9ng minh t\u00ednh ph\u00e1p l\u00fd nh\u01b0 \u0111\u0103ng k\u00fd kinh doanh ho\u1eb7c th\u00f4ng tin li\u00ean h\u1ec7 h\u1ee3p l\u1ec7.<br>Ph\u00f9 h\u1ee3p cho c\u00e1c t\u1ed5 ch\u1ee9c, c\u00f4ng ty, ho\u1eb7c website d\u1ecbch v\u1ee5 c\u1ea7n th\u1ec3 hi\u1ec7n \u0111\u1ed9 tin c\u1eady cao h\u01a1n.<\/li>\n\n\n\n<li><strong>EV \u2013 Extended Validation:<\/strong> \u0110\u00e2y l\u00e0 lo\u1ea1i ch\u1ee9ng ch\u1ec9 c\u00f3 m\u1ee9c x\u00e1c th\u1ef1c nghi\u00eam ng\u1eb7t nh\u1ea5t. CA s\u1ebd ti\u1ebfn h\u00e0nh ki\u1ec3m tra chi ti\u1ebft danh t\u00ednh doanh nghi\u1ec7p, \u0111\u1ecba ch\u1ec9, quy\u1ec1n s\u1edf h\u1eefu v\u00e0 t\u00ecnh tr\u1ea1ng ph\u00e1p l\u00fd. Tr\u01b0\u1edbc \u0111\u00e2y, tr\u00ecnh duy\u1ec7t t\u1eebng hi\u1ec3n th\u1ecb t\u00ean doanh nghi\u1ec7p c\u1ea1nh bi\u1ec3u t\u01b0\u1ee3ng \u1ed5 kh\u00f3a, nh\u01b0ng hi\u1ec7n nay giao di\u1ec7n n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c gi\u1ea3n l\u01b0\u1ee3c.<br>Tuy v\u1eady, EV v\u1eabn l\u00e0 l\u1ef1a ch\u1ecdn h\u00e0ng \u0111\u1ea7u cho c\u00e1c ng\u00e2n h\u00e0ng, s\u00e0n th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed, ho\u1eb7c doanh nghi\u1ec7p l\u1edbn c\u1ea7n th\u1ec3 hi\u1ec7n uy t\u00edn t\u1ed1i \u0111a.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3.2 Ph\u00e2n lo\u1ea1i theo ph\u1ea1m vi s\u1eed d\u1ee5ng (Scope of Coverage)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Single Domain Certificate:<\/strong><br>B\u1ea3o v\u1ec7 m\u1ed9t t\u00ean mi\u1ec1n duy nh\u1ea5t, v\u00ed d\u1ee5: <code>example.com<\/code>.<br>Th\u00edch h\u1ee3p cho website \u0111\u1ed9c l\u1eadp ho\u1eb7c trang gi\u1edbi thi\u1ec7u \u0111\u01a1n gi\u1ea3n.<\/li>\n\n\n\n<li><strong>Wildcard Certificate:<\/strong><br>B\u1ea3o v\u1ec7 t\u1ea5t c\u1ea3 c\u00e1c subdomain c\u00f9ng c\u1ea5p c\u1ee7a m\u1ed9t t\u00ean mi\u1ec1n, ch\u1eb3ng h\u1ea1n <code>*.<code><a href=\"https:\/\/kienthucmo.com\/\" data-type=\"link\" data-id=\"https:\/\/kienthucmo.com\/\">kienthucmo.com<\/a><\/code><\/code> s\u1ebd bao g\u1ed3m <code>shop.<code><a href=\"https:\/\/kienthucmo.com\/\" data-type=\"link\" data-id=\"https:\/\/kienthucmo.com\/\">kienthucmo.com<\/a><\/code><\/code>, <code>blog.<code><a href=\"https:\/\/kienthucmo.com\/\" data-type=\"link\" data-id=\"https:\/\/kienthucmo.com\/\">kienthucmo.com<\/a><\/code><\/code>, v.v.<br>R\u1ea5t ti\u1ec7n l\u1ee3i khi c\u00f3 nhi\u1ec1u d\u1ecbch v\u1ee5 ho\u1eb7c \u1ee9ng d\u1ee5ng con tr\u00ean c\u00f9ng h\u1ec7 th\u1ed1ng.<\/li>\n\n\n\n<li><strong>Multi-Domain (SAN) Certificate:<\/strong><br>Cho ph\u00e9p b\u1ea3o v\u1ec7 nhi\u1ec1u t\u00ean mi\u1ec1n kh\u00e1c nhau trong c\u00f9ng m\u1ed9t ch\u1ee9ng ch\u1ec9, v\u00ed d\u1ee5: <code><a href=\"https:\/\/kienthucmo.com\/\" data-type=\"link\" data-id=\"https:\/\/kienthucmo.com\/\">kienthucmo.com<\/a><\/code>, <code>openbook.org<\/code>, <code>opentech.net<\/code>. Ph\u00f9 h\u1ee3p cho c\u00e1c doanh nghi\u1ec7p ho\u1eb7c t\u1ed5 ch\u1ee9c qu\u1ea3n l\u00fd nhi\u1ec1u website c\u00f9ng l\u00fac.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00f9y v\u00e0o m\u1ee9c \u0111\u1ed9 tin c\u1eady c\u1ea7n thi\u1ebft, chi ph\u00ed, v\u00e0 quy m\u00f4 h\u1ec7 th\u1ed1ng, m\u00ecnh c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn lo\u1ea1i ch\u1ee9ng ch\u1ec9 ph\u00f9 h\u1ee3p. V\u1edbi c\u00e1 nh\u00e2n ho\u1eb7c d\u1ef1 \u00e1n nh\u1ecf, ch\u1ee9ng ch\u1ec9 DV mi\u1ec5n ph\u00ed t\u1eeb Let\u2019s Encrypt l\u00e0 \u0111\u1ee7; c\u00f2n c\u00e1c doanh nghi\u1ec7p n\u00ean ch\u1ecdn OV ho\u1eb7c EV \u0111\u1ec3 t\u0103ng uy t\u00edn v\u00e0 \u0111\u1ed9 chuy\u00ean nghi\u1ec7p.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4. S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa SSL v\u00e0 TLS<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">SSL (Secure Sockets Layer) v\u00e0 TLS (Transport Layer Security) \u0111\u1ec1u \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf nh\u1eb1m m\u1ee5c \u0111\u00edch gi\u1ed1ng nhau &#8211;  b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u trong qu\u00e1 tr\u00ecnh truy\u1ec1n t\u1ea3i gi\u1eefa client v\u00e0 server. Tuy nhi\u00ean, ch\u00fang kh\u00e1c nhau v\u1ec1 m\u1ee9c \u0111\u1ed9 an to\u00e0n, hi\u1ec7u n\u0103ng, v\u00e0 ti\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1ec1 l\u1ecbch s\u1eed, SSL l\u00e0 phi\u00ean b\u1ea3n \u0111\u1ea7u ti\u00ean do Netscape ph\u00e1t tri\u1ec3n v\u00e0o nh\u1eefng n\u0103m 1990, g\u1ed3m SSL 2.0 v\u00e0 SSL 3.0. D\u00f9 l\u00e0 n\u1ec1n t\u1ea3ng cho giao th\u1ee9c b\u1ea3o m\u1eadt ng\u00e0y nay, nh\u01b0ng c\u1ea3 hai phi\u00ean b\u1ea3n n\u00e0y \u0111\u00e3 b\u1ed9c l\u1ed9 nhi\u1ec1u l\u1ed7 h\u1ed5ng nghi\u00eam tr\u1ecdng nh\u01b0 t\u1ea5n c\u00f4ng POODLE ho\u1eb7c BEAST, khi\u1ebfn ch\u00fang kh\u00f4ng c\u00f2n \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb s\u1eed d\u1ee5ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sau \u0111\u00f3, TLS ra \u0111\u1eddi nh\u01b0 phi\u00ean b\u1ea3n k\u1ebf nhi\u1ec7m c\u1ee7a SSL, b\u1eaft \u0111\u1ea7u t\u1eeb TLS 1.0, ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n qua TLS 1.1, 1.2 v\u00e0 hi\u1ec7n nay l\u00e0 TLS 1.3  &#8211;  ti\u00eau chu\u1ea9n b\u1ea3o m\u1eadt hi\u1ec7n h\u00e0nh \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a trong <a href=\"https:\/\/datatracker.ietf.org\/doc\/html\/rfc8446?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\">RFC 8446<\/a>. TLS k\u1ebf th\u1eeba c\u1ea5u tr\u00fac c\u1ee7a SSL nh\u01b0ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf l\u1ea1i an to\u00e0n h\u01a1n, hi\u1ec7u qu\u1ea3 h\u01a1n v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng t\u1ed1t h\u01a1n.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/kienthucmo.com\/wp-content\/uploads\/ssl-vs-tls.png\" alt=\"S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa SSL v\u00e0 TLS\" class=\"wp-image-2107\" srcset=\"https:\/\/kienthucmo.com\/wp-content\/uploads\/ssl-vs-tls.png 800w, https:\/\/kienthucmo.com\/wp-content\/uploads\/ssl-vs-tls-300x169.png 300w, https:\/\/kienthucmo.com\/wp-content\/uploads\/ssl-vs-tls-768x432.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea3ng so s\u00e1nh nhanh gi\u1eefa SSL v\u00e0 TLS:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Ti\u00eau ch\u00ed<\/strong><\/th><th><strong>SSL<\/strong><\/th><th><strong>TLS<\/strong><\/th><\/tr><\/thead><tbody><tr><td><strong>Phi\u00ean b\u1ea3n<\/strong><\/td><td>SSL 2.0 \/ 3.0 (\u0111\u00e3 l\u1ed7i th\u1eddi)<\/td><td>TLS 1.0 \u2192 1.2 \u2192 1.3 (hi\u1ec7n h\u00e0nh)<\/td><\/tr><tr><td><strong>B\u1ea3o m\u1eadt<\/strong><\/td><td>Nhi\u1ec1u l\u1ed7 h\u1ed5ng, d\u1ec5 b\u1ecb t\u1ea5n c\u00f4ng<\/td><td>C\u1ea3i ti\u1ebfn m\u1ea1nh v\u1ec1 m\u00e3 h\u00f3a, ch\u1ed1ng gi\u1ea3 m\u1ea1o t\u1ed1t h\u01a1n<\/td><\/tr><tr><td><strong>Hi\u1ec7u n\u0103ng<\/strong><\/td><td>Ch\u1eadm, c\u1ea7n nhi\u1ec1u v\u00f2ng b\u1eaft tay<\/td><td>T\u1ed1i \u01b0u h\u01a1n, \u0111\u1eb7c bi\u1ec7t v\u1edbi TLS 1.3 gi\u1ea3m \u0111\u1ed9 tr\u1ec5 k\u1ebft n\u1ed1i<\/td><\/tr><tr><td><strong>Khuy\u1ebfn ngh\u1ecb s\u1eed d\u1ee5ng<\/strong><\/td><td>Kh\u00f4ng n\u00ean d\u00f9ng<\/td><td>TLS 1.2 ho\u1eb7c 1.3 l\u00e0 ti\u00eau chu\u1ea9n b\u1eaft bu\u1ed9c hi\u1ec7n nay<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00f3m l\u1ea1i, TLS ch\u00ednh l\u00e0 \u201cphi\u00ean b\u1ea3n m\u1edbi v\u00e0 an to\u00e0n c\u1ee7a SSL\u201d. Khi c\u1ea5u h\u00ecnh m\u00e1y ch\u1ee7, m\u00ecnh n\u00ean v\u00f4 hi\u1ec7u h\u00f3a c\u00e1c phi\u00ean b\u1ea3n c\u0169 nh\u01b0 SSLv3, TLS 1.0 ho\u1eb7c 1.1, v\u00e0 ch\u1ec9 b\u1eadt TLS 1.2\/1.3 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o m\u1ee9c b\u1ea3o m\u1eadt t\u1ed1i \u01b0u cho h\u1ec7 th\u1ed1ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">5. Vai tr\u00f2 v\u00e0 t\u1ea7m quan tr\u1ecdng c\u1ee7a SSL\/TLS trong an to\u00e0n th\u00f4ng tin<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">SSL\/TLS kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 k\u1ef9 thu\u1eadt &#8211;  n\u00f3 l\u00e0 l\u1edbp b\u1ea3o v\u1ec7 c\u1ed1t l\u00f5i c\u1ee7a Internet hi\u1ec7n \u0111\u1ea1i, gi\u00fap duy tr\u00ec t\u00ednh an to\u00e0n, tin c\u1eady v\u00e0 ri\u00eang t\u01b0 trong m\u1ecdi giao ti\u1ebfp tr\u1ef1c tuy\u1ebfn. N\u1ebfu kh\u00f4ng c\u00f3 SSL\/TLS, m\u1ecdi th\u00f4ng tin b\u1ea1n g\u1eedi ho\u1eb7c nh\u1eadn &#8211; nh\u01b0 m\u1eadt kh\u1ea9u, s\u1ed1 th\u1ebb ng\u00e2n h\u00e0ng, hay d\u1eef li\u1ec7u c\u00e1 nh\u00e2n &#8211;  \u0111\u1ec1u c\u00f3 th\u1ec3 b\u1ecb \u0111\u1ecdc tr\u1ed9m ho\u1eb7c ch\u1ec9nh s\u1eeda tr\u00ean \u0111\u01b0\u1eddng truy\u1ec1n.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"168\" src=\"https:\/\/kienthucmo.com\/wp-content\/uploads\/so-sanh-ssl-va-tls.jpg\" alt=\"So s\u00e1nh SSL v\u00e0 TLS\" class=\"wp-image-2111\" style=\"aspect-ratio:1.7857663701327111;width:635px;height:auto\"\/><figcaption class=\"wp-element-caption\">Vai tr\u00f2 v\u00e0 t\u1ea7m quan tr\u1ecdng c\u1ee7a SSL\/TLS trong an to\u00e0n th\u00f4ng tin<\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">C\u1ee5 th\u1ec3, SSL\/TLS gi\u00fap b\u1ea3o v\u1ec7 h\u1ec7 th\u1ed1ng v\u00e0 ng\u01b0\u1eddi d\u00f9ng kh\u1ecfi c\u00e1c r\u1ee7i ro sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Man-in-the-Middle (MITM):<\/strong><br>\u0110\u00e2y l\u00e0 d\u1ea1ng t\u1ea5n c\u00f4ng khi k\u1ebb x\u1ea5u ch\u1eb7n \u0111\u1ee9ng gi\u1eefa client v\u00e0 server, \u0111\u1ecdc ho\u1eb7c thay \u0111\u1ed5i d\u1eef li\u1ec7u m\u00e0 ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng h\u1ec1 hay bi\u1ebft. Khi SSL\/TLS \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh \u0111\u00fang v\u00e0 ch\u1ee9ng ch\u1ec9 h\u1ee3p l\u1ec7, m\u1ecdi d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a v\u00e0 x\u00e1c th\u1ef1c, khi\u1ebfn k\u1ebb t\u1ea5n c\u00f4ng kh\u00f4ng th\u1ec3 gi\u1ea3i m\u00e3 ho\u1eb7c can thi\u1ec7p.<\/li>\n\n\n\n<li><strong>Eavesdropping (nghe l\u00e9n):<\/strong><br>D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a b\u1eb1ng c\u00e1c thu\u1eadt to\u00e1n m\u1ea1nh (nh\u01b0 AES ho\u1eb7c ChaCha20), n\u00ean ngay c\u1ea3 khi b\u1ecb \u0111\u00e1nh c\u1eafp, th\u00f4ng tin c\u0169ng ch\u1ec9 l\u00e0 \u201cchu\u1ed7i k\u00fd t\u1ef1 v\u00f4 ngh\u0129a\u201d \u0111\u1ed1i v\u1edbi k\u1ebb t\u1ea5n c\u00f4ng.<\/li>\n\n\n\n<li><strong>Impersonation (gi\u1ea3 m\u1ea1o website):<\/strong><br>SSL\/TLS s\u1eed d\u1ee5ng ch\u1ee9ng ch\u1ec9 s\u1ed1 do CA (Certificate Authority) ph\u00e1t h\u00e0nh, gi\u00fap tr\u00ecnh duy\u1ec7t x\u00e1c th\u1ef1c danh t\u00ednh c\u1ee7a m\u00e1y ch\u1ee7. \u0110i\u1ec1u n\u00e0y ng\u0103n ch\u1eb7n ng\u01b0\u1eddi d\u00f9ng b\u1ecb l\u1eeba truy c\u1eadp v\u00e0o c\u00e1c trang web gi\u1ea3 m\u1ea1o c\u00f3 giao di\u1ec7n gi\u1ed1ng h\u1ec7t website th\u1eadt.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ngo\u00e0i c\u00e1c l\u1ee3i \u00edch b\u1ea3o m\u1eadt tr\u1ef1c ti\u1ebfp, SSL\/TLS c\u00f2n mang l\u1ea1i gi\u00e1 tr\u1ecb chi\u1ebfn l\u01b0\u1ee3c cho website:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>T\u0103ng \u0111\u1ed9 tin c\u1eady c\u1ee7a ng\u01b0\u1eddi d\u00f9ng:<\/strong> Bi\u1ec3u t\u01b0\u1ee3ng \u1ed5 kh\u00f3a tr\u00ean thanh \u0111\u1ecba ch\u1ec9 t\u1ea1o c\u1ea3m gi\u00e1c an to\u00e0n, khi\u1ebfn ng\u01b0\u1eddi d\u00f9ng y\u00ean t\u00e2m h\u01a1n khi giao d\u1ecbch.<\/li>\n\n\n\n<li><strong>C\u1ea3i thi\u1ec7n SEO:<\/strong> Google \u0111\u00e3 x\u00e1c nh\u1eadn r\u1eb1ng HTTPS l\u00e0 m\u1ed9t t\u00edn hi\u1ec7u x\u1ebfp h\u1ea1ng, d\u00f9 kh\u00f4ng l\u1edbn nh\u01b0ng \u0111\u1ee7 \u0111\u1ec3 n\u00e2ng th\u1ee9 h\u1ea1ng t\u00ecm ki\u1ebfm so v\u1edbi c\u00e1c trang HTTP th\u00f4ng th\u01b0\u1eddng.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00f3m l\u1ea1i, SSL\/TLS v\u1eeba l\u00e0 h\u00e0ng r\u00e0o b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u, v\u1eeba l\u00e0 c\u00f4ng c\u1ee5 c\u1ee7ng c\u1ed1 uy t\u00edn cho website. Trong b\u1ed1i c\u1ea3nh Internet ng\u00e0y c\u00e0ng ph\u1ee9c t\u1ea1p v\u00e0 nhi\u1ec1u m\u1ed1i \u0111e d\u1ecda, vi\u1ec7c tri\u1ec3n khai HTTPS kh\u00f4ng c\u00f2n l\u00e0 t\u00f9y ch\u1ecdn &#8211;  m\u00e0 l\u00e0 ti\u00eau chu\u1ea9n b\u1eaft bu\u1ed9c cho m\u1ecdi h\u1ec7 th\u1ed1ng tr\u1ef1c tuy\u1ebfn.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">6. K\u1ebft lu\u1eadn<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sau khi c\u00f9ng t\u00ecm hi\u1ec3u, c\u00f3 th\u1ec3 th\u1ea5y SSL\/TLS kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t giao th\u1ee9c k\u1ef9 thu\u1eadt m\u00e0 c\u00f2n l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a ni\u1ec1m tin tr\u00ean Internet. Nh\u1edd n\u00f3, m\u1ecdi th\u00f4ng tin trao \u0111\u1ed5i gi\u1eefa ng\u01b0\u1eddi d\u00f9ng v\u00e0 m\u00e1y ch\u1ee7 \u0111\u1ec1u \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a, x\u00e1c th\u1ef1c v\u00e0 b\u1ea3o v\u1ec7 kh\u1ecfi c\u00e1c m\u1ed1i nguy nh\u01b0 nghe l\u00e9n hay gi\u1ea3 m\u1ea1o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ng\u00e0y nay, vi\u1ec7c tri\u1ec3n khai HTTPS g\u1ea7n nh\u01b0 l\u00e0 m\u1ed9t y\u00eau c\u1ea7u b\u1eaft bu\u1ed9c &#8211; kh\u00f4ng ch\u1ec9 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n d\u1eef li\u1ec7u, m\u00e0 c\u00f2n \u0111\u1ec3 x\u00e2y d\u1ef1ng uy t\u00edn cho website, c\u1ea3i thi\u1ec7n tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng v\u00e0 th\u1eadm ch\u00ed h\u1ed7 tr\u1ee3 SEO. D\u00f9 b\u1ea1n l\u00e0 nh\u00e0 ph\u00e1t tri\u1ec3n, qu\u1ea3n tr\u1ecb h\u1ec7 th\u1ed1ng hay ch\u1ec9 \u0111\u01a1n gi\u1ea3n l\u00e0 ng\u01b0\u1eddi quan t\u00e2m \u0111\u1ebfn b\u1ea3o m\u1eadt, hi\u1ec3u r\u00f5 c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a SSL\/TLS s\u1ebd gi\u00fap b\u1ea1n \u0111\u00e1nh gi\u00e1 v\u00e0 c\u1ea5u h\u00ecnh m\u00f4i tr\u01b0\u1eddng m\u1ea1ng m\u1ed9t c\u00e1ch t\u1ef1 tin h\u01a1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Khi n\u1eafm v\u1eefng nh\u1eefng nguy\u00ean t\u1eafc n\u00e0y, m\u1ed7i ch\u00fang ta \u0111\u1ec1u c\u00f3 th\u1ec3 g\u00f3p ph\u1ea7n l\u00e0m cho Internet tr\u1edf th\u00e0nh m\u1ed9t kh\u00f4ng gian an to\u00e0n v\u00e0 \u0111\u00e1ng tin c\u1eady h\u01a1n &#8211; n\u01a1i th\u00f4ng tin \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7, v\u00e0 ni\u1ec1m tin tr\u1edf th\u00e0nh ti\u00eau chu\u1ea9n chung ch\u1ee9 kh\u00f4ng ch\u1ec9 l\u00e0 l\u1ef1a ch\u1ecdn.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">7. T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">[1] E. Rescorla, <em>SSL and TLS: Designing and Building Secure Systems<\/em>, Addison-Wesley, 2001.<br>[2] Internet Engineering Task Force (IETF), \u201cThe Transport Layer Security (TLS) Protocol Version 1.3,\u201d <em>RFC 8446<\/em>, Aug. 2018.<br>[3] Mozilla, \u201cMozilla SSL Configuration Generator,\u201d [Online]. Available: <a>https:\/\/ssl-config.mozilla.org\/<\/a>.<br>[4] Google Security Blog, \u201cHTTPS as a Ranking Signal,\u201d Aug. 2014. [Online]. Available: <a href=\"https:\/\/developers.google.com\/search\/blog\/2014\/08\/https-as-ranking-signal?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\">https:\/\/developers.google.com\/search\/blog\/2014\/08\/https-as-ranking-signal<\/a>.<br>[5] Cloudflare, \u201cWhat is SSL\/TLS Encryption?\u201d [Online]. Available: <a>https:\/\/www.cloudflare.com\/learning\/ssl\/what-is-ssl\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p> SSL\/TLS kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t giao th\u1ee9c k\u1ef9 thu\u1eadt m\u00e0 c\u00f2n l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a ni\u1ec1m tin tr\u00ean Internet. Nh\u1edd n\u00f3, m\u1ecdi th\u00f4ng tin trao \u0111\u1ed5i gi\u1eefa ng\u01b0\u1eddi d\u00f9ng v\u00e0 m\u00e1y ch\u1ee7 \u0111\u1ec1u \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a, x\u00e1c th\u1ef1c v\u00e0 b\u1ea3o v\u1ec7 kh\u1ecfi c\u00e1c m\u1ed1i nguy nh\u01b0 nghe l\u00e9n hay gi\u1ea3 m\u1ea1o.<\/p>\n","protected":false},"author":1,"featured_media":2101,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"googlesitekit_rrm_CAowieHDDA:productID":"","footnotes":""},"categories":[20,19],"tags":[],"class_list":["post-2096","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-an-toan-thong-tin","category-mang-may-tinh"],"_links":{"self":[{"href":"https:\/\/kienthucmo.com\/vi\/wp-json\/wp\/v2\/posts\/2096","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kienthucmo.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kienthucmo.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kienthucmo.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kienthucmo.com\/vi\/wp-json\/wp\/v2\/comments?post=2096"}],"version-history":[{"count":7,"href":"https:\/\/kienthucmo.com\/vi\/wp-json\/wp\/v2\/posts\/2096\/revisions"}],"predecessor-version":[{"id":3291,"href":"https:\/\/kienthucmo.com\/vi\/wp-json\/wp\/v2\/posts\/2096\/revisions\/3291"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kienthucmo.com\/vi\/wp-json\/wp\/v2\/media\/2101"}],"wp:attachment":[{"href":"https:\/\/kienthucmo.com\/vi\/wp-json\/wp\/v2\/media?parent=2096"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kienthucmo.com\/vi\/wp-json\/wp\/v2\/categories?post=2096"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kienthucmo.com\/vi\/wp-json\/wp\/v2\/tags?post=2096"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}