{"id":8119,"date":"2021-05-09T10:57:33","date_gmt":"2021-05-09T03:57:33","guid":{"rendered":"https:\/\/www.fiahub.com\/blog\/?p=8119"},"modified":"2025-06-10T21:29:26","modified_gmt":"2025-06-10T14:29:26","slug":"cryptography-la-gi-thong-tin-tong-hop-ve-cryptography-phai-nam","status":"publish","type":"post","link":"https:\/\/www.fiahub.com\/blog\/cryptography-la-gi-thong-tin-tong-hop-ve-cryptography-phai-nam\/","title":{"rendered":"Cryptography l\u00e0 g\u00ec? Th\u00f4ng tin t\u1ed5ng h\u1ee3p v\u1ec1 Cryptography ph\u1ea3i n\u1eafm"},"content":{"rendered":"\r\n<p>Cryptography c\u00f3 l\u1ebd l\u00e0 m\u1ed9t c\u00e1i t\u00ean kh\u00e1 quen thu\u1ed9c ho\u1eb7c c\u00f3 th\u1ec3 l\u1ea1 l\u1eabm v\u1edbi nhi\u1ec1u ng\u01b0\u1eddi \u0111\u00e3 v\u00e0 \u0111ang khai th\u00e1c l\u0129nh v\u1ef1c ti\u1ec1n \u0111i\u1ec7n t\u1eed. Tuy nhi\u00ean, \u0111\u00e3 bao gi\u1edd b\u1ea1n t\u00ecm hi\u1ec3u k\u1ef9 v\u1ec1 \u201c\u0111\u1ecbnh ngh\u0129a\u201d c\u1ee7a thu\u1eadt ng\u1eef n\u00e0y ch\u01b0a. Trong b\u00e0i vi\u1ebft h\u00f4m nay, Fiahub s\u1ebd gi\u00fap b\u1ea1n t\u1ed5ng h\u1ee3p t\u1ea5t c\u1ea3 nh\u1eefng th\u00f4ng tin li\u00ean quan \u0111\u1ebfn Cryptography ngay d\u01b0\u1edbi \u0111\u00e2y nh\u00e9!<\/p>\r\n\r\n\r\n\r\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\"><p class=\"ez-toc-title\" style=\"cursor:inherit\">N\u1ed9i dung b\u00e0i vi\u1ebft<\/p>\n<\/div><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.fiahub.com\/blog\/cryptography-la-gi-thong-tin-tong-hop-ve-cryptography-phai-nam\/#Thuat_ngu_Cryptography\" >Thu\u1eadt ng\u1eef Cryptography\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.fiahub.com\/blog\/cryptography-la-gi-thong-tin-tong-hop-ve-cryptography-phai-nam\/#Dac_diem_cua_Mat_ma_hoc\" >\u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a M\u1eadt m\u00e3 h\u1ecdc<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.fiahub.com\/blog\/cryptography-la-gi-thong-tin-tong-hop-ve-cryptography-phai-nam\/#Cryptography_giai_quyet_van_de_gi\" >Cryptography gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.fiahub.com\/blog\/cryptography-la-gi-thong-tin-tong-hop-ve-cryptography-phai-nam\/#Phan_loai_Cryptography\" >Ph\u00e2n lo\u1ea1i Cryptography<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.fiahub.com\/blog\/cryptography-la-gi-thong-tin-tong-hop-ve-cryptography-phai-nam\/#Mat_ma_khoa_doi_xung\" >M\u1eadt m\u00e3 kh\u00f3a \u0111\u1ed1i x\u1ee9ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.fiahub.com\/blog\/cryptography-la-gi-thong-tin-tong-hop-ve-cryptography-phai-nam\/#Mat_ma_khoa_cong_khai\" >M\u1eadt m\u00e3 kh\u00f3a c\u00f4ng khai<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.fiahub.com\/blog\/cryptography-la-gi-thong-tin-tong-hop-ve-cryptography-phai-nam\/#Ham_bam\" >H\u00e0m b\u0103m<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.fiahub.com\/blog\/cryptography-la-gi-thong-tin-tong-hop-ve-cryptography-phai-nam\/#Cryptography_duoc_su_dung_de_lam_gi\" >Cryptography \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u00e0m g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.fiahub.com\/blog\/cryptography-la-gi-thong-tin-tong-hop-ve-cryptography-phai-nam\/#3_nguyen_tac_bao_ve_khoa_ma_ban_phai_biet\" >3 nguy\u00ean t\u1eafc b\u1ea3o v\u1ec7 kh\u00f3a m\u00e0 b\u1ea1n ph\u1ea3i bi\u1ebft<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Thuat_ngu_Cryptography\"><\/span>Thu\u1eadt ng\u1eef Cryptography\u00a0<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>Cryptography l\u00e0 m\u1ed9t thu\u1eadt ng\u1eef ti\u1ebfng Anh v\u1edbi ngh\u0129a \u201cM\u1eadt m\u00e3 h\u1ecdc\u201d. N\u00f3 g\u1eafn li\u1ec1n v\u1edbi qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i v\u0103n b\u1ea3n th\u00f4ng th\u01b0\u1eddng tr\u1edf th\u00e0nh v\u0103n b\u1ea3n ph\u1ee9c t\u1ea1p m\u00e0 ch\u1ec9 c\u00f3 ng\u01b0\u1eddi &#8211; ng\u01b0\u1eddi m\u00e0 ng\u01b0\u1eddi g\u1eedi nh\u1eafm \u0111\u1ebfn m\u1edbi c\u00f3 th\u1ec3 \u0111\u1ecdc v\u00e0 x\u1eed l\u00fd n\u00f3.\u00a0<\/p>\r\n\r\n\r\n\r\n<p>\u0110\u00e2y l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p l\u01b0u tr\u1eef v\u00e0 truy\u1ec1n d\u1eef li\u1ec7u \u1edf d\u1ea1ng c\u1ee5 th\u1ec3 mang t\u00ednh b\u1ea3o m\u1eadt c\u1ef1c k\u1ef3 cao. Gi\u00fap b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u kh\u00f4ng b\u1ecb \u0111\u00e1nh c\u1eafp ho\u1eb7c thay \u0111\u1ed5i. V\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c th\u1ef1c ng\u01b0\u1eddi d\u00f9ng.\u00a0<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dac_diem_cua_Mat_ma_hoc\"><\/span>\u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a M\u1eadt m\u00e3 h\u1ecdc<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>M\u1eadt m\u00e3 h\u1ecdc tr\u01b0\u1edbc \u0111\u00e2y \u0111\u1ed3ng ngh\u0129a v\u1edbi m\u00e3 h\u00f3a m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. Nh\u01b0ng ng\u00e0y nay m\u1eadt m\u00e3 ch\u1ee7 y\u1ebfu l\u1ea1i d\u1ef1a tr\u00ean l\u00fd thuy\u1ebft to\u00e1n h\u1ecdc v\u00e0 th\u1ef1c h\u00e0nh tr\u00ean m\u00e1y t\u00ednh.\u00a0<\/p>\r\n\r\n\r\n\r\n<p>M\u1ed1i quan t\u00e2m c\u1ee7a m\u1ecdi ng\u01b0\u1eddi li\u00ean quan \u0111\u1ebfn l\u0129nh v\u1ef1c n\u00e0y l\u00e0 :<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>T\u00ednh b\u1ea3o m\u1eadt: Kh\u00f4ng m\u1ed9t ai c\u00f3 th\u1ec3 hi\u1ec3u \u0111\u01b0\u1ee3c th\u00f4ng tin<\/li>\r\n<li>T\u00ednh to\u00e0n v\u1eb9n: Kh\u00f4ng th\u1ec3 thay \u0111\u1ed5i hay ch\u1ec9nh s\u1eeda th\u00f4ng tin<\/li>\r\n<li>Kh\u00f4ng tho\u00e1i th\u00e1c: Ng\u01b0\u1eddi g\u1eedi kh\u00f4ng th\u1ec3 ph\u1ee7 nh\u1eadn \u00fd \u0111\u1ecbnh l\u00e0 c\u1ee7a m\u00ecnh trong vi\u1ec7c truy\u1ec1n \u0111i th\u00f4ng tin \u1edf giai \u0111o\u1ea1n sau<\/li>\r\n<li>X\u00e1c th\u1ef1c: Ng\u01b0\u1eddi g\u1eedi v\u00e0 ng\u01b0\u1eddi nh\u1eadn \u0111\u01b0\u1ee3c x\u00e1c minh<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cryptography_giai_quyet_van_de_gi\"><\/span>Cryptography gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>M\u1ed9t h\u1ec7 th\u1ed1ng an to\u00e0n ph\u1ea3i cung c\u1ea5p m\u1ed9t s\u1ed1 \u0111\u1ea3m b\u1ea3o nh\u01b0 t\u00ednh b\u1ea3o m\u1eadt, t\u00ednh to\u00e0n v\u1eb9n v\u00e0 t\u00ednh s\u1eb5n c\u00f3 c\u1ee7a d\u1eef li\u1ec7u c\u0169ng nh\u01b0 t\u00ednh x\u00e1c th\u1ef1c v\u00e0 kh\u00f4ng t\u1eeb ch\u1ed1i. Khi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u00fang c\u00e1ch, ti\u1ec1n \u0111i\u1ec7n t\u1eed s\u1ebd cung c\u1ea5p nh\u1eefng \u0111\u1ea3m b\u1ea3o n\u00e0y. M\u1eadt m\u00e3 c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh b\u00ed m\u1eadt v\u00e0 to\u00e0n v\u1eb9n c\u1ee7a c\u1ea3 d\u1eef li\u1ec7u \u0111ang chuy\u1ec3n c\u0169ng nh\u01b0 d\u1eef li\u1ec7u \u1edf tr\u1ea1ng th\u00e1i c\u00f2n l\u1ea1i. N\u00f3 c\u0169ng c\u00f3 th\u1ec3 x\u00e1c th\u1ef1c ng\u01b0\u1eddi g\u1eedi v\u00e0 ng\u01b0\u1eddi nh\u1eadn v\u1edbi nhau v\u00e0 b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i s\u1ef1 t\u1eeb ch\u1ed1i.<\/p>\r\n\r\n\r\n\r\n<div class=\"wp-block-image\">\r\n<figure class=\"aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" width=\"900\" height=\"600\" class=\"wp-image-8120\" src=\"https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/05\/cryptography-1.jpg\" alt=\"lo\u1ea1i gi\u1ea3i m\u00e3 ROT13\" srcset=\"https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/05\/cryptography-1.jpg 900w, https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/05\/cryptography-1-150x100.jpg 150w, https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/05\/cryptography-1-300x200.jpg 300w, https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/05\/cryptography-1-768x512.jpg 768w, https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/05\/cryptography-1-810x540.jpg 810w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/>\r\n<figcaption><span class=\"tadv-color\" style=\"color: #444444;\">V\u00ed d\u1ee5 v\u1ec1 gi\u1ea3i m\u1eadt m\u00e3<\/span><\/figcaption>\r\n<\/figure>\r\n<\/div>\r\n\r\n\r\n\r\n<p>C\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7 t\u00ednh b\u1ea3o m\u1eadt v\u00e0 t\u00ednh to\u00e0n v\u1eb9n \u0111\u01b0\u1ee3c cung c\u1ea5p b\u1edfi c\u00e1c giao th\u1ee9c m\u1eadt m\u00e3 nh\u01b0 SSL \/ TLS c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 th\u00f4ng tin li\u00ean l\u1ea1c kh\u1ecfi b\u1ecb nghe tr\u1ed9m v\u00e0 gi\u1ea3 m\u1ea1o \u0111\u1ed9c h\u1ea1i.\u00a0<\/p>\r\n\r\n\r\n\r\n<p>C\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7 t\u00ednh x\u00e1c th\u1ef1c cung c\u1ea5p s\u1ef1 \u0111\u1ea3m b\u1ea3o r\u1eb1ng ng\u01b0\u1eddi d\u00f9ng \u0111ang th\u1ef1c s\u1ef1 giao ti\u1ebfp v\u1edbi h\u1ec7 th\u1ed1ng nh\u01b0 d\u1ef1 \u0111\u1ecbnh. V\u00ed d\u1ee5: b\u1ea1n \u0111ang g\u1eedi m\u1eadt kh\u1ea9u ng\u00e2n h\u00e0ng tr\u1ef1c tuy\u1ebfn c\u1ee7a m\u00ecnh cho ng\u00e2n h\u00e0ng c\u1ee7a b\u1ea1n hay ng\u01b0\u1eddi kh\u00e1c?<\/p>\r\n\r\n\r\n\r\n<p>N\u00f3 c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u \u1edf tr\u1ea1ng th\u00e1i ngh\u1ec9. D\u1eef li\u1ec7u tr\u00ean \u0111\u0129a di \u0111\u1ed9ng ho\u1eb7c trong c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a \u0111\u1ec3 ng\u0103n vi\u1ec7c ti\u1ebft l\u1ed9 d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m n\u1ebfu ph\u01b0\u01a1ng ti\u1ec7n v\u1eadt l\u00fd b\u1ecb m\u1ea5t ho\u1eb7c b\u1ecb \u0111\u00e1nh c\u1eafp. Ngo\u00e0i ra, n\u00f3 c\u0169ng c\u00f3 th\u1ec3 cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 to\u00e0n v\u1eb9n d\u1eef li\u1ec7u \u1edf tr\u1ea1ng th\u00e1i ngh\u1ec9 \u0111\u1ec3 ph\u00e1t hi\u1ec7n gi\u1ea3 m\u1ea1o \u0111\u1ed9c h\u1ea1i.<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Phan_loai_Cryptography\"><\/span>Ph\u00e2n lo\u1ea1i Cryptography<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>\u0110\u1ed1i v\u1edbi thu\u1eadt to\u00e1n m\u00e3 h\u00f3a, c\u00f3 r\u1ea5t nhi\u1ec1u c\u00e1ch \u0111\u1ec1 ph\u00e2n lo\u1ea1i. Tuy nhi\u00ean, trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta ch\u1ec9 t\u00ecm hi\u1ec3u 3 lo\u1ea1i k\u1ef9 thu\u1eadt m\u1eadt m\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u nh\u1ea5t. \u0110\u00f3 ch\u00ednh l\u00e0:<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>M\u1eadt m\u00e3 kh\u00f3a \u0111\u1ed1i x\u1ee9ng<\/li>\r\n<li>M\u1eadt m\u00e3 h\u00e0m b\u0103m<\/li>\r\n<li>M\u1eadt m\u00e3 kh\u00f3a c\u00f4ng khai<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Mat_ma_khoa_doi_xung\"><\/span>M\u1eadt m\u00e3 kh\u00f3a \u0111\u1ed1i x\u1ee9ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>C\u1ea3 ng\u01b0\u1eddi g\u1eedi v\u00e0 ng\u01b0\u1eddi nh\u1eadn \u0111\u1ec1u d\u00f9ng chung m\u1ed9t \u201ckey\u201d duy nh\u1ea5t. Ng\u01b0\u1eddi g\u1eedi s\u1eed d\u1ee5ng kh\u00f3a n\u00e0y \u0111\u1ec3 m\u00e3 h\u00f3a b\u1ea3n g\u1ed1c (b\u1ea3n d\u1ec5 hi\u1ec3u) v\u00e0 g\u1eedi v\u0103n b\u1ea3n m\u1eadt m\u00e3 \u0111\u1ebfn ng\u01b0\u1eddi nh\u1eadn.\u00a0<\/p>\r\n\r\n\r\n\r\n<p>\u0110\u1ed1i v\u1edbi ng\u01b0\u1eddi nh\u1eadn, h\u1ecd s\u1ebd \u00e1p d\u1ee5ng c\u00f9ng m\u1ed9t ph\u00edm \u0111\u1ec3 gi\u1ea3i m\u00e3 tin nh\u1eafn v\u00e0 ph\u1ee5c h\u1ed3i b\u1ea3n g\u1ed1c thu\u1ea7n t\u00fay.\u00a0<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Mat_ma_khoa_cong_khai\"><\/span>M\u1eadt m\u00e3 kh\u00f3a c\u00f4ng khai<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>\u0110\u00e2y l\u00e0 kh\u00e1i ni\u1ec7m mang t\u00ednh c\u00e1ch m\u1ea1ng trong m\u1ed9t th\u1eddi gian d\u00e0i. Trong m\u1eadt m\u00e3 kh\u00f3a c\u00f4ng khai, hai kh\u00f3a li\u00ean quan (kh\u00f3a c\u00f4ng khai v\u00e0 kh\u00f3a ri\u00eang) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. Kh\u00f3a c\u00f4ng khai c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n ph\u1ed1i t\u1ef1 do. Trong khi \u0111\u00f3, kh\u00f3a ri\u00eang \u0111\u01b0\u1ee3c gh\u00e9p n\u1ed1i v\u1edbi n\u00f3 v\u1eabn l\u00e0 m\u1ed9t b\u00ed m\u1eadt. Kh\u00f3a c\u00f4ng khai \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 m\u00e3 h\u00f3a v\u00e0 kh\u00f3a c\u00e1 nh\u00e2n s\u1eed d\u1ee5ng \u0111\u1ec3 gi\u1ea3i m\u00e3.\u00a0<\/p>\r\n\r\n\r\n\r\n<div class=\"wp-block-image\">\r\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"900\" height=\"600\" class=\"wp-image-8121\" src=\"https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/05\/cryptography-2.jpg\" alt=\"S\u01a1 \u0111\u1ed3 chi ti\u1ebft m\u1eadt m\u00e3 kh\u00f3a c\u00f4ng khai\" srcset=\"https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/05\/cryptography-2.jpg 900w, https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/05\/cryptography-2-150x100.jpg 150w, https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/05\/cryptography-2-300x200.jpg 300w, https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/05\/cryptography-2-768x512.jpg 768w, https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/05\/cryptography-2-810x540.jpg 810w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/>\r\n<figcaption><span class=\"tadv-color\" style=\"color: #444444;\">M\u1ed9t trong 3 k\u1ef9 thu\u1eadt cryptography <\/span><\/figcaption>\r\n<\/figure>\r\n<\/div>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ham_bam\"><\/span>H\u00e0m b\u0103m<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>Trong thu\u1eadt to\u00e1n n\u00e0y, kh\u00f4ng c\u00f3 m\u1ed9t kh\u00f3a n\u00e0o s\u1eed d\u1ee5ng c\u1ee7a. Gi\u00e1 tr\u1ecb b\u0103m c\u00f3 \u0111\u1ed9 d\u00e0i c\u1ed1 \u0111\u1ecbnh \u0111\u01b0\u1ee3c t\u00ednh theo v\u0103n b\u1ea3n thu\u1ea7n t\u00fay. \u0110i\u1ec1u n\u00e0y khi\u1ebfn cho n\u1ed9i dung c\u1ee7a v\u0103n b\u1ea3n thu\u1ea7n t\u00fay kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c kh\u00f4i ph\u1ee5c n\u1eefa.<\/p>\r\n\r\n\r\n\r\n<p>H\u00e0m b\u0103m c\u0169ng \u0111\u01b0\u1ee3c nhi\u1ec1u h\u1ec7 \u0111i\u1ec1u h\u00e0nh s\u1eed d\u1ee5ng \u0111\u1ec3 m\u00e3 h\u00f3a m\u1eadt kh\u1ea9u.\u00a0<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cryptography_duoc_su_dung_de_lam_gi\"><\/span>Cryptography \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u00e0m g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>C\u00f3 l\u1ebd r\u1ea5t nhi\u1ec1u b\u1ea1n t\u00f2 m\u00f2 v\u00e0 th\u1ea3o lu\u1eadn v\u1ec1 t\u00ednh \u1ee9ng d\u1ee5ng c\u1ee7a m\u1eadt m\u00e3. T\u1eeb vi\u1ec7c gi\u1eef b\u00ed m\u1eadt qu\u00e2n s\u1ef1 \u0111\u1ebfn truy\u1ec1n d\u1eef li\u1ec7u t\u00e0i ch\u00ednh m\u1ed9t c\u00e1ch an to\u00e0n quan internet\u2026\u00a0<\/p>\r\n\r\n\r\n\r\n<p>Tuy nhi\u00ean, v\u1edbi m\u1ed9t b\u1ee9c tranh to\u00e0n c\u1ea3nh, Cryptography \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng h\u01a1n nh\u1eefng g\u00ec m\u00e0 ch\u00fang ta t\u01b0\u1edfng t\u01b0\u1ee3ng. N\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng tr\u00ean nh\u1eefng \u0111i\u1ec1u nh\u1ecf b\u00e9 cho \u0111\u1ebfn nh\u1eefng \u0111i\u1ec1u to l\u1edbn.\u00a0<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>\u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong truy\u1ec1n tin t\u1ee9c c\u1ee7a \u0111\u1eb7c v\u1ee5, m\u1eadt v\u1ee5<\/li>\r\n<li>T\u00e0i kho\u1ea3n ng\u00e2n h\u00e0ng<\/li>\r\n<li>M\u1eadt kh\u1ea9u m\u00e1y t\u00ednh<\/li>\r\n<li>\u2026.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_nguyen_tac_bao_ve_khoa_ma_ban_phai_biet\"><\/span>3 nguy\u00ean t\u1eafc b\u1ea3o v\u1ec7 kh\u00f3a m\u00e0 b\u1ea1n ph\u1ea3i bi\u1ebft<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>L\u01b0u tr\u1eef kh\u00f3a trong h\u1ec7 th\u1ed1ng t\u1ec7p v\u00e0 b\u1ea3o v\u1ec7 ch\u00fang b\u1eb1ng danh s\u00e1ch ki\u1ec3m so\u00e1t truy c\u1eadp m\u1ea1nh (ACL). H\u00e3y nh\u1edb tu\u00e2n th\u1ee7 nguy\u00ean t\u1eafc c\u1ee7a \u0111\u1eb7c quy\u1ec1n \u00edt nh\u1ea5t.\u00a0<\/li>\r\n<li>M\u00e3 h\u00f3a kh\u00f3a m\u00e3 h\u00f3a d\u1eef li\u1ec7u c\u1ee7a b\u1ea1n (DEK) b\u1eb1ng kh\u00f3a m\u00e3 h\u00f3a kh\u00f3a th\u1ee9 hai (KEK). KEK ph\u1ea3i \u0111\u01b0\u1ee3c t\u1ea1o b\u1eb1ng m\u00e3 h\u00f3a d\u1ef1a tr\u00ean m\u1eadt kh\u1ea9u (PBE). M\u1eadt kh\u1ea9u m\u00e0 m\u1ed9t s\u1ed1 \u00edt qu\u1ea3n tr\u1ecb vi\u00ean bi\u1ebft \u0111\u1ebfn c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o kh\u00f3a b\u1eb1ng thu\u1eadt to\u00e1n nh\u01b0 bcrypt, scrypt ho\u1eb7c PBKDF2 v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 kh\u1edfi \u0111\u1ed9ng h\u1ec7 th\u1ed1ng m\u1eadt m\u00e3. \u0110i\u1ec1u n\u00e0y lo\u1ea1i b\u1ecf nhu c\u1ea7u l\u01b0u tr\u1eef kh\u00f3a kh\u00f4ng \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a \u1edf b\u1ea5t k\u1ef3 \u0111\u00e2u.\u00a0<\/li>\r\n<li>M\u00f4-\u0111un b\u1ea3o m\u1eadt ph\u1ea7n c\u1ee9ng (HSM) l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb ph\u1ea7n c\u1ee9ng ch\u1ed1ng gi\u1ea3 m\u1ea1o c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u01b0u tr\u1eef kh\u00f3a m\u1ed9t c\u00e1ch an to\u00e0n. M\u00e3 c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n l\u1ec7nh g\u1ecdi API t\u1edbi HSM \u0111\u1ec3 cung c\u1ea5p kh\u00f3a khi c\u1ea7n thi\u1ebft ho\u1eb7c \u0111\u1ec3 th\u1ef1c hi\u1ec7n gi\u1ea3i m\u00e3 d\u1eef li\u1ec7u tr\u00ean ch\u00ednh HSM.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p>Hy v\u1ecdng b\u00e0i vi\u1ebft tr\u00ean \u0111\u00e3 cung c\u1ea5p cho b\u1ea1n nh\u1eefng th\u00f4ng tin h\u1eefu \u00edch nh\u1ea5t v\u1ec1 Cryptography &#8211; ng\u00e0nh m\u1eadt m\u00e3 h\u1ecdc &#8211; m\u1ed9t ng\u00e0nh \u0111\u01b0\u1ee3c coi l\u00e0 \u0111\u1ea7y huy\u1ec1n b\u00ed v\u00e0 khi\u1ebfn nhi\u1ec1u ng\u01b0\u1eddi t\u00f2 m\u00f2 c\u0169ng nh\u01b0 \u0111au \u0111\u1ea7u. \u0110\u1ec3 c\u00f3 th\u1ec3 t\u00ecm hi\u1ec3u th\u00eam nhi\u1ec1u th\u00f4ng tin v\u1ec1 ti\u1ec1n \u0111i\u1ec7n t\u1eed hay c\u00e1c l\u0129nh v\u1ef1c li\u00ean quan, h\u00e3y th\u01b0\u1eddng xuy\u00ean theo d\u00f5i tr\u00ean trang blog c\u1ee7a Fiahub nh\u00e9!<\/p>\r\n\r\n\r\n\r\n<p>Tr\u00ean \u0111\u00e2y l\u00e0 b\u00e0i vi\u1ebft c\u1ee7a Fiahub &#8211; S\u00e0n giao d\u1ecbch h\u00e0ng \u0111\u1ea7u Vi\u1ec7t Nam. <\/p>\r\n","protected":false},"excerpt":{"rendered":"<p>Cryptography c\u00f3 l\u1ebd l\u00e0 m\u1ed9t c\u00e1i t\u00ean kh\u00e1 quen thu\u1ed9c ho\u1eb7c c\u00f3 th\u1ec3 l\u1ea1 l\u1eabm v\u1edbi nhi\u1ec1u ng\u01b0\u1eddi \u0111\u00e3 v\u00e0 \u0111ang khai th\u00e1c l\u0129nh v\u1ef1c ti\u1ec1n \u0111i\u1ec7n t\u1eed. Tuy nhi\u00ean, \u0111\u00e3 bao gi\u1edd b\u1ea1n t\u00ecm hi\u1ec3u k\u1ef9 v\u1ec1 \u201c\u0111\u1ecbnh ngh\u0129a\u201d c\u1ee7a thu\u1eadt ng\u1eef n\u00e0y ch\u01b0a. Trong b\u00e0i vi\u1ebft h\u00f4m nay, Fiahub s\u1ebd gi\u00fap b\u1ea1n t\u1ed5ng<\/p>\n","protected":false},"author":23,"featured_media":8122,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"elementor_theme","format":"standard","meta":{"footnotes":""},"categories":[21850],"tags":[16121],"class_list":{"0":"post-8119","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-tu-dien-crypto","8":"tag-mat-ma-hoc"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.0 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Cryptography l\u00e0 g\u00ec? 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