{"id":22993,"date":"2023-09-17T10:00:35","date_gmt":"2023-09-17T03:00:35","guid":{"rendered":"https:\/\/www.fiahub.com\/blog\/?p=22993"},"modified":"2023-09-16T15:02:09","modified_gmt":"2023-09-16T08:02:09","slug":"known-plaintext-attacks-la-gi","status":"publish","type":"post","link":"https:\/\/www.fiahub.com\/blog\/known-plaintext-attacks-la-gi\/","title":{"rendered":"Known-plaintext Attacks l\u00e0 g\u00ec?"},"content":{"rendered":"<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\/known-plaintext-attacks-la-gi\/#The_nao_la_Known-plaintext_Attacks\" >Th\u1ebf n\u00e0o l\u00e0 Known-plaintext Attacks?<\/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\/known-plaintext-attacks-la-gi\/#Known-plaintext_attacks_da_biet_hoat_dong_nhu_the_nao\" >Known-plaintext attacks \u0111\u00e3 bi\u1ebft ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.fiahub.com\/blog\/known-plaintext-attacks-la-gi\/#Thu_thap_cac_cap_da_biet\" >Thu th\u1eadp c\u00e1c c\u1eb7p \u0111\u00e3 bi\u1ebft<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.fiahub.com\/blog\/known-plaintext-attacks-la-gi\/#Phan_tich_mau\" >Ph\u00e2n t\u00edch m\u1eabu<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.fiahub.com\/blog\/known-plaintext-attacks-la-gi\/#Lay_khoa_hoac_thuat_toan\" >L\u1ea5y kh\u00f3a ho\u1eb7c thu\u1eadt to\u00e1n<\/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\/known-plaintext-attacks-la-gi\/#Giai_ma_du_lieu_khac\" >Gi\u1ea3i m\u00e3 d\u1eef li\u1ec7u kh\u00e1c<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.fiahub.com\/blog\/known-plaintext-attacks-la-gi\/#Chosen-plaintext_Attacks_va_known-plaintext_Attacks\" >Chosen-plaintext Attacks v\u00e0 known-plaintext Attacks<\/a><\/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\/known-plaintext-attacks-la-gi\/#Lam_the_nao_de_bao_ve_chong_lai_mot_Known-plaintext_Attack\" >L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i m\u1ed9t Known-plaintext Attack?<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"The_nao_la_Known-plaintext_Attacks\"><\/span><span style=\"font-weight: 400\">Th\u1ebf n\u00e0o l\u00e0 Known-plaintext Attacks?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><b>Known-plaintext attacks (KPA) <\/b><span style=\"font-weight: 400\">l\u00e0 khi tin t\u1eb7c s\u1eed d\u1ee5ng c\u00e1c c\u1eb7p t\u00e0i li\u1ec7u n\u1ed5i ti\u1ebfng\u00a0<\/span><span style=\"font-weight: 400\">\u0111\u01b0\u1ee3c m\u00e3 h\u00f3a v\u00e0 kh\u00f4ng \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh thu\u1eadt to\u00e1n ho\u1eb7c kh\u00f3a m\u00e3 h\u00f3a.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Trong m\u1ed9t <\/span><b>Known-plaintext Attacks<\/b><span style=\"font-weight: 400\">, k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 quy\u1ec1n truy c\u1eadp v\u00e0o c\u1ea3 d\u1ea1ng m\u00e3 h\u00f3a c\u1ee7a d\u1eef li\u1ec7u <\/span><i><span style=\"font-weight: 400\">(ciphertext)<\/span><\/i><span style=\"font-weight: 400\"> v\u00e0 b\u1ea3n sao v\u0103n b\u1ea3n g\u1ed1c t\u01b0\u01a1ng \u1ee9ng c\u1ee7a d\u1eef li\u1ec7u g\u1ed1c <\/span><i><span style=\"font-weight: 400\">(unencrypted form)<\/span><\/i><span style=\"font-weight: 400\">. K\u1ebb t\u1ea5n c\u00f4ng c\u1ed1 g\u1eafng x\u00e1c \u0111\u1ecbnh kh\u00f3a ho\u1eb7c thu\u1eadt to\u00e1n m\u00e3 h\u00f3a b\u1eb1ng c\u00e1ch ki\u1ec3m tra m\u1ed1i quan h\u1ec7 gi\u1eefa <\/span><i><span style=\"font-weight: 400\">plaintext<\/span><\/i><span style=\"font-weight: 400\"> v\u00e0 <\/span><i><span style=\"font-weight: 400\">ciphertext<\/span><\/i><span style=\"font-weight: 400\">.<\/span><\/p>\n<p><span style=\"font-weight: 400\">V\u00ed d\u1ee5: n\u1ebfu \u201cCRYPTO\u201d \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a th\u00e0nh \u201cXUZZA\u201d, vi\u1ec7c bi\u1ebft c\u1eb7p n\u00e0y c\u00f3 th\u1ec3 cho ph\u00e9p k\u1ebb t\u1ea5n c\u00f4ng gi\u1ea3i m\u00e3 c\u00e1c ph\u1ea7n kh\u00e1c c\u1ee7a tin nh\u1eafn c\u0169ng \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a b\u1eb1ng c\u00f9ng m\u1ed9t kh\u00f3a thay th\u1ebf. \u0110i\u1ec1u n\u00e0y ch\u1ee9ng t\u1ecf r\u1eb1ng, v\u1edbi m\u1ed9t s\u1ed1 thu\u1eadt to\u00e1n m\u00e3 h\u00f3a, ngay c\u1ea3 m\u1ed9t l\u01b0\u1ee3ng ki\u1ebfn th\u1ee9c nh\u1ecf c\u0169ng c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn vi\u1ec7c gi\u1ea3i m\u00e3 r\u1ed9ng h\u01a1n.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Ki\u1ec3u t\u1ea5n c\u00f4ng n\u00e0y s\u1eed d\u1ee5ng m\u1ed9t l\u1ed7 h\u1ed5ng trong k\u1ef9 thu\u1eadt m\u00e3 h\u00f3a gi\u00fap x\u00e1c \u0111\u1ecbnh c\u00e1c m\u1eabu ho\u1eb7c k\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c t\u1ea1o ra gi\u1eefa b\u1ea3n r\u00f5 v\u00e0 b\u1ea3n m\u00e3. N\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c ng\u0103n ch\u1eb7n m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c, c\u00e1c <\/span><b>Known-plaintext Attacks<\/b><span style=\"font-weight: 400\"> c\u00f3 th\u1ec3 g\u00e2y nguy hi\u1ec3m cho t\u00ednh b\u1ea3o m\u1eadt c\u1ee7a h\u1ec7 th\u1ed1ng m\u00e3 h\u00f3a.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Hai ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn \u0111\u1ec3 khai th\u00e1c <\/span><i><span style=\"font-weight: 400\">plaintext <\/span><\/i><span style=\"font-weight: 400\">v\u00e0 d\u1ea1ng m\u00e3 h\u00f3a t\u01b0\u01a1ng \u1ee9ng c\u1ee7a n\u00f3 nh\u1eb1m kh\u00e1m ph\u00e1 c\u00e1c kh\u00f3a m\u00e3 h\u00f3a bao g\u1ed3m ph\u00e2n t\u00edch t\u1ea7n s\u1ed1 <\/span><i><span style=\"font-weight: 400\">(frequency analysis) <\/span><\/i><span style=\"font-weight: 400\">v\u00e0 kh\u1edbp m\u1eabu <\/span><i><span style=\"font-weight: 400\">(pattern matching)<\/span><\/i><span style=\"font-weight: 400\">. Ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n t\u00edch t\u1ea7n s\u1ed1 s\u1eed d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p m\u00e3 h\u00f3a \u0111\u01a1n gi\u1ea3n b\u1eb1ng c\u00e1ch thay th\u1ebf t\u1eebng k\u00fd t\u1ef1 ho\u1eb7c k\u00fd hi\u1ec7u m\u1ed9t-m\u1ed9t. Nh\u1eefng k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 t\u00ecm ra ch\u00eca kh\u00f3a ho\u1eb7c m\u1edf kh\u00f3a ph\u1ea7n c\u00f2n l\u1ea1i c\u1ee7a giao ti\u1ebfp b\u1eb1ng c\u00e1ch so s\u00e1nh t\u1ea7n su\u1ea5t xu\u1ea5t hi\u1ec7n c\u1ee7a c\u00e1c ch\u1eef c\u00e1i ho\u1eb7c m\u1eabu c\u1ee5 th\u1ec3 trong <\/span><i><span style=\"font-weight: 400\">plaintext<\/span><\/i><span style=\"font-weight: 400\"> v\u00e0 b\u1ea3n m\u00e3 li\u00ean quan.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Nh\u1eefng k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n ra c\u00e1c xu h\u01b0\u1edbng khi c\u00f9ng m\u1ed9t <em>plaintext<\/em> t\u1ea1o ra c\u00f9ng m\u1ed9t b\u1ea3n m\u00e3 theo ph\u01b0\u01a1ng ph\u00e1p kh\u1edbp m\u1eabu. H\u1ecd c\u00f3 th\u1ec3 nh\u1eadn ra thu\u1eadt to\u00e1n m\u00e3 h\u00f3a v\u00e0 gi\u1ea3i m\u00e3 to\u00e0n b\u1ed9 tin nh\u1eafn b\u1eb1ng c\u00e1ch x\u00e1c \u0111\u1ecbnh c\u00e1c m\u1eabu trong v\u0103n b\u1ea3n \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a v\u00e0 so s\u00e1nh ch\u00fang v\u1edbi c\u00e1c m\u1eabu \u0111\u00e3 bi\u1ebft trong <em>plaintex<\/em>t g\u1ed1c.<\/span><\/p>\n<figure id=\"attachment_22994\" aria-describedby=\"caption-attachment-22994\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-image-22994\" src=\"https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2023\/09\/a1-10.png\" alt=\"Known-plaintext attacks (KPA)\" width=\"900\" height=\"518\" srcset=\"https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2023\/09\/a1-10.png 640w, https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2023\/09\/a1-10-300x173.png 300w, https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2023\/09\/a1-10-150x86.png 150w, https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2023\/09\/a1-10-450x259.png 450w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><figcaption id=\"caption-attachment-22994\" class=\"wp-caption-text\">Known-plaintext attacks (KPA) l\u00e0 khi tin t\u1eb7c s\u1eed d\u1ee5ng c\u00e1c c\u1eb7p t\u00e0i li\u1ec7u \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a v\u00e0 kh\u00f4ng \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a n\u1ed5i ti\u1ebfng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh thu\u1eadt to\u00e1n ho\u1eb7c kh\u00f3a m\u00e3 h\u00f3a.<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Known-plaintext_attacks_da_biet_hoat_dong_nhu_the_nao\"><\/span><span style=\"font-weight: 400\">Known-plaintext attacks \u0111\u00e3 bi\u1ebft ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400\">Trong KPA, k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 t\u00ecm hi\u1ec3u c\u00e1c chi ti\u1ebft quan tr\u1ecdng v\u1ec1 ph\u01b0\u01a1ng ph\u00e1p m\u00e3 h\u00f3a b\u1eb1ng c\u00e1ch ph\u00e2n t\u00edch c\u00e1ch c\u00e1c \u0111o\u1ea1n c\u1ee5 th\u1ec3 c\u1ee7a v\u0103n b\u1ea3n g\u1ed1c \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i th\u00e0nh v\u0103n b\u1ea3n m\u00e3 h\u00f3a b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00f9ng m\u1ed9t kh\u00f3a ho\u1eb7c thu\u1eadt to\u00e1n m\u00e3 h\u00f3a.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Cu\u1ed9c t\u1ea5n c\u00f4ng bao g\u1ed3m c\u00e1c b\u01b0\u1edbc sau:<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Thu_thap_cac_cap_da_biet\"><\/span><span style=\"font-weight: 400\">Thu th\u1eadp c\u00e1c c\u1eb7p \u0111\u00e3 bi\u1ebft<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400\">K\u1ebb t\u1ea5n c\u00f4ng t\u00edch l\u0169y c\u00e1c c\u1eb7p <\/span><i><span style=\"font-weight: 400\">plaintext <\/span><\/i><span style=\"font-weight: 400\">v\u00e0 v\u0103n b\u1ea3n m\u1eadt m\u00e3 \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a li\u00ean quan c\u00f3 \u0111\u01b0\u1ee3c th\u00f4ng qua c\u00e1c k\u1ef9 thu\u1eadt kh\u00e1c nhau, ch\u1eb3ng h\u1ea1n nh\u01b0 th\u00f4ng tin li\u00ean l\u1ea1c b\u1ecb ch\u1eb7n ho\u1eb7c r\u00f2 r\u1ec9 d\u1eef li\u1ec7u.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Phan_tich_mau\"><\/span><span style=\"font-weight: 400\">Ph\u00e2n t\u00edch m\u1eabu<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400\">Khi b\u1ea3n r\u00f5 \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a \u0111\u1ec3 t\u1ea1o th\u00e0nh b\u1ea3n m\u00e3, k\u1ebb t\u1ea5n c\u00f4ng s\u1ebd so s\u00e1nh c\u00e1c m\u1eabu, s\u1eeda \u0111\u1ed5i v\u00e0 bi\u1ebfn \u0111\u1ed5i di\u1ec5n ra. \u0110\u1ec3 hi\u1ec3u ho\u1ea1t \u0111\u1ed9ng c\u1ee7a qu\u00e1 tr\u00ecnh m\u00e3 h\u00f3a, h\u1ecd t\u00ecm ki\u1ebfm c\u00e1c m\u1ed1i quan h\u1ec7 th\u01b0\u1eddng xuy\u00ean gi\u1eefa <\/span><i><span style=\"font-weight: 400\">plaintext<\/span><\/i><span style=\"font-weight: 400\"> v\u00e0 <\/span><i><span style=\"font-weight: 400\">ciphertext<\/span><\/i><span style=\"font-weight: 400\"> \u0111\u00e3 bi\u1ebft.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Lay_khoa_hoac_thuat_toan\"><\/span><span style=\"font-weight: 400\">L\u1ea5y kh\u00f3a ho\u1eb7c thu\u1eadt to\u00e1n<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400\">K\u1ebb t\u1ea5n c\u00f4ng c\u1ed1 g\u1eafng x\u00e1c \u0111\u1ecbnh c\u00e1c y\u1ebfu t\u1ed1 m\u00e3 h\u00f3a quan tr\u1ecdng, ch\u1eb3ng h\u1ea1n nh\u01b0 kh\u00f3a m\u00e3 h\u00f3a, thu\u1eadt to\u00e1n ho\u1eb7c c\u00e1c tham s\u1ed1 quy tr\u00ecnh kh\u00e1c, d\u1ef1a tr\u00ean c\u00e1c m\u1eabu m\u00e0 ch\u00fang \u0111\u00e3 nh\u1eadn th\u1ea5y. H\u1ecd c\u00f3 th\u1ec3 sao ch\u00e9p \u0111\u1ed9c l\u1eadp qu\u00e1 tr\u00ecnh m\u00e3 h\u00f3a nh\u1edd v\u00e0o suy lu\u1eadn n\u00e0y.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Giai_ma_du_lieu_khac\"><\/span><span style=\"font-weight: 400\">Gi\u1ea3i m\u00e3 d\u1eef li\u1ec7u kh\u00e1c<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400\">K\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 gi\u1ea3i m\u00e3 c\u00e1c t\u00e0i li\u1ec7u \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a kh\u00e1c s\u1eed d\u1ee5ng c\u00f9ng m\u1ed9t thu\u1eadt to\u00e1n m\u00e3 h\u00f3a b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng kh\u00f3a ho\u1eb7c thu\u1eadt to\u00e1n \u0111\u01b0\u1ee3c suy lu\u1eadn. Quy tr\u00ecnh n\u00e0y c\u00f3 th\u1ec3 l\u00e0m r\u00f2 r\u1ec9 th\u00f4ng tin b\u00ed m\u1eadt ho\u1eb7c g\u00e2y nguy hi\u1ec3m cho t\u00ednh b\u1ea3o m\u1eadt c\u1ee7a h\u1ec7 th\u1ed1ng m\u00e3 h\u00f3a.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Chosen-plaintext_Attacks_va_known-plaintext_Attacks\"><\/span><span style=\"font-weight: 400\">Chosen-plaintext Attacks v\u00e0 known-plaintext Attacks<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><b>Chosen-plaintext Attacks<\/b><span style=\"font-weight: 400\"> li\u00ean quan \u0111\u1ebfn vi\u1ec7c \u0111\u1ed1i th\u1ee7 ch\u1ecdn b\u1ea3n r\u00f5 v\u00e0 ph\u00e2n t\u00edch b\u1ea3n m\u00e3 t\u01b0\u01a1ng \u1ee9ng, trong khi <\/span><b>Known-plaintext Attacks<\/b><span style=\"font-weight: 400\"> x\u1ea3y ra khi k\u1ebb t\u1ea5n c\u00f4ng s\u1edf h\u1eefu m\u1ed9t ph\u1ea7n ki\u1ebfn th\u1ee9c v\u1ec1 b\u1ea3n r\u00f5.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Hi\u1ec3u \u0111\u01b0\u1ee3c s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa hai cu\u1ed9c t\u1ea5n c\u00f4ng m\u1eadt m\u00e3 n\u00e0y l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c chi\u1ebfn l\u01b0\u1ee3c b\u1ea3o v\u1ec7 m\u1eadt m\u00e3 hi\u1ec7u qu\u1ea3.<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><\/td>\n<td><b>Chosen-plaintext Attacks<\/b><\/td>\n<td><b>Known-plaintext Attacks<\/b><\/td>\n<\/tr>\n<tr>\n<td><b>B\u1ed1i c\u1ea3nh<\/b><\/td>\n<td><span style=\"font-weight: 400\">K\u1ebb t\u1ea5n c\u00f4ng l\u1ef1a ch\u1ecdn plaintext<\/span><\/td>\n<td><span style=\"font-weight: 400\">K\u1ebb t\u1ea5n c\u00f4ng ch\u1ec9 bi\u1ebft m\u1ed9t v\u00e0i plaintext<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>Lo\u1ea1i Attack<\/b><\/td>\n<td><span style=\"font-weight: 400\">Nghe l\u00e9n th\u1ee5 \u0111\u1ed9ng<\/span><\/td>\n<td><span style=\"font-weight: 400\">Thao t\u00e1c ch\u1ee7 \u0111\u1ed9ng<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>Lo\u1ea1i h\u00ecnh<\/b><\/td>\n<td><span style=\"font-weight: 400\">Gi\u1ea3i m\u00e3 v\u0103n b\u1ea3n m\u1eadt m\u00e3<\/span><\/td>\n<td><span style=\"font-weight: 400\">X\u00e1c \u0111\u1ecbnh ph\u01b0\u01a1ng ph\u00e1p m\u00e3 ho\u00e1<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>Tr\u00ecnh \u0111\u1ed9 hi\u1ec3u bi\u1ebft c\u1ea7n c\u00f3<\/b><\/td>\n<td><span style=\"font-weight: 400\">Kh\u00f4ng y\u00eau c\u1ea7u c\u00f3 hi\u1ec3u bi\u1ebft v\u1ec1 plaintext<\/span><\/td>\n<td><span style=\"font-weight: 400\">M\u1ed9t s\u1ed1 plaintext c\u1ea7n hi\u1ec3u r\u00f5<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>T\u00ednh ph\u1ee9c t\u1ea1p<\/b><\/td>\n<td><span style=\"font-weight: 400\">V\u1eeba ph\u1ea3i<\/span><\/td>\n<td><span style=\"font-weight: 400\">Th\u1ea5p<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>V\u00ed d\u1ee5<\/b><\/td>\n<td><span style=\"font-weight: 400\">Gi\u1ea3i m\u00e3 c\u1ed5 \u0111i\u1ec3n<\/span><\/td>\n<td><span style=\"font-weight: 400\">Ph\u00e2n t\u00edch t\u1ea7n s\u1ed1<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"font-weight: 400\">Ph\u00e2n t\u00edch t\u1ea7n s\u1ed1 t\u1eadp trung v\u00e0o vi\u1ec7c ki\u1ec3m tra s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a c\u00e1c ch\u1eef c\u00e1i ho\u1eb7c k\u00fd hi\u1ec7u \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh thu\u1eadt to\u00e1n m\u00e3 h\u00f3a, kh\u00f4ng gi\u1ed1ng nh\u01b0 ph\u00e2n t\u00edch m\u1eadt m\u00e3 c\u1ed5 \u0111i\u1ec3n, ki\u1ec3m tra v\u0103n b\u1ea3n m\u00e3 h\u00f3a \u0111\u1ec3 t\u00ecm c\u00e1c m\u1eabu v\u00e0 sai s\u00f3t.<\/span><\/p>\n<figure id=\"attachment_22995\" aria-describedby=\"caption-attachment-22995\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" class=\"wp-image-22995\" src=\"https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2023\/09\/Anh-chup-Man-hinh-2023-09-16-luc-14.53.21.png\" alt=\"Chosen-plaintext Attacks\" width=\"900\" height=\"555\" srcset=\"https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2023\/09\/Anh-chup-Man-hinh-2023-09-16-luc-14.53.21.png 1366w, https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2023\/09\/Anh-chup-Man-hinh-2023-09-16-luc-14.53.21-300x185.png 300w, https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2023\/09\/Anh-chup-Man-hinh-2023-09-16-luc-14.53.21-1024x631.png 1024w, https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2023\/09\/Anh-chup-Man-hinh-2023-09-16-luc-14.53.21-150x92.png 150w, https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2023\/09\/Anh-chup-Man-hinh-2023-09-16-luc-14.53.21-768x473.png 768w, https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2023\/09\/Anh-chup-Man-hinh-2023-09-16-luc-14.53.21-450x277.png 450w, https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2023\/09\/Anh-chup-Man-hinh-2023-09-16-luc-14.53.21-1200x740.png 1200w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><figcaption id=\"caption-attachment-22995\" class=\"wp-caption-text\">Chosen-plaintext Attacks<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Lam_the_nao_de_bao_ve_chong_lai_mot_Known-plaintext_Attack\"><\/span><span style=\"font-weight: 400\">L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i m\u1ed9t Known-plaintext Attack?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400\">\u0110\u1ec3 b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i c\u00e1c<\/span><b> Known-plaintext Attacks<\/b><span style=\"font-weight: 400\">, h\u00e3y \u00e1p d\u1ee5ng thu\u1eadt to\u00e1n m\u00e3 h\u00f3a m\u1ea1nh, qu\u1ea3n l\u00fd kh\u00f3a m\u00e3 h\u00f3a m\u1ed9t c\u00e1ch an to\u00e0n, s\u1eed d\u1ee5ng kh\u00f3a duy nh\u1ea5t cho m\u1ed7i phi\u00ean v\u00e0 th\u00eam t\u00ednh ng\u1eabu nhi\u00ean v\u00e0o quy tr\u00ecnh m\u00e3 h\u00f3a \u0111\u1ec3 t\u0103ng c\u01b0\u1eddng kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Ch\u1ecdn c\u00e1c thu\u1eadt to\u00e1n m\u00e3 h\u00f3a c\u00f3 th\u1ec3 ch\u1ed1ng l\u1ea1i c\u00e1c <\/span><b>Known-plaintext Attacks<\/b><span style=\"font-weight: 400\"> b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c k\u1ef9 thu\u1eadt m\u00e3 h\u00f3a m\u1ea1nh. B\u1eb1ng c\u00e1ch ng\u0103n ch\u1eb7n c\u00e1c m\u1eabu trong b\u1ea3n r\u00f5 t\u01b0\u01a1ng quan v\u1edbi c\u00e1c m\u1eabu trong v\u0103n b\u1ea3n m\u00e3 h\u00f3a, c\u00e1c thu\u1eadt to\u00e1n m\u00e3 h\u00f3a hi\u1ec7n \u0111\u1ea1i nh\u01b0 Ti\u00eau chu\u1ea9n m\u00e3 h\u00f3a n\u00e2ng cao (AES) \u0111\u01b0\u1ee3c t\u1ea1o ra \u0111\u1ec3 t\u1ed3n t\u1ea1i tr\u01b0\u1edbc c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng nh\u01b0 v\u1eady. AES l\u00e0 m\u1ed9t thu\u1eadt to\u00e1n m\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i, n\u1ed5i ti\u1ebfng v\u1ec1 t\u00ednh b\u1ea3o m\u1eadt v\u00e0 hi\u1ec7u qu\u1ea3.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Qu\u1ea3n l\u00fd an to\u00e0n c\u00e1c kh\u00f3a m\u00e3 h\u00f3a \u0111\u1ec3 tr\u00e1nh truy c\u1eadp tr\u00e1i ph\u00e9p. S\u1eed d\u1ee5ng kho l\u01b0u tr\u1eef kh\u00f3a an to\u00e0n, xoay kh\u00f3a th\u01b0\u1eddng xuy\u00ean v\u00e0 s\u1eed d\u1ee5ng c\u00e1c k\u1ef9 thu\u1eadt t\u1ea1o kh\u00f3a m\u1ea1nh m\u1ebd. Ngo\u00e0i ra, tr\u00e1nh m\u00e3 h\u00f3a c\u00e1c kh\u1ed1i d\u1eef li\u1ec7u r\u1eddi r\u1ea1c, c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c. \u0110\u1ec3 ng\u0103n k\u1ebb t\u1ea5n c\u00f4ng s\u1eed d\u1ee5ng c\u00e1c c\u1eb7p \u0111\u00e3 bi\u1ebft, h\u00e3y m\u00e3 h\u00f3a to\u00e0n b\u1ed9 tin nh\u1eafn ho\u1eb7c t\u1ec7p.<\/span><\/p>\n<p><span style=\"font-weight: 400\">H\u01a1n n\u1eefa, h\u00e3y s\u1eed d\u1ee5ng c\u00e1c ph\u00edm kh\u00e1c nhau cho c\u00e1c phi\u00ean v\u00e0 n\u1ed7 l\u1ef1c kh\u00e1c nhau. T\u00e1c \u0111\u1ed9ng c\u1ee7a <\/span><b>Known-plaintext Attacks<\/b><span style=\"font-weight: 400\"> \u0111\u00e3 gi\u1ea3m do m\u1ed7i phi\u00ean s\u1ebd s\u1eed d\u1ee5ng m\u1ed9t kh\u00f3a m\u00e3 h\u00f3a kh\u00e1c nhau. Ngo\u00e0i ra, h\u00e3y duy tr\u00ec c\u00e1c phi\u00ean b\u1ea3n m\u1edbi nh\u1ea5t c\u1ee7a h\u1ec7 th\u1ed1ng, th\u01b0 vi\u1ec7n v\u00e0 ph\u1ea7n m\u1ec1m m\u00e3 h\u00f3a c\u1ee7a b\u1ea1n. C\u00e1c b\u1ea3n s\u1eeda l\u1ed7i b\u1ea3o m\u1eadt gi\u00fap s\u1eeda ch\u1eefa c\u00e1c l\u1ed7 h\u1ed5ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o c\u00e1c b\u1ea3n c\u1eadp nh\u1eadt.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Tr\u01b0\u1edbc khi m\u00e3 h\u00f3a b\u1ea3n r\u00f5 c\u1ee7a d\u1eef li\u1ec7u, h\u00e3y th\u00eam mu\u1ed1i m\u1eadt m\u00e3 &#8211; m\u1ed9t gi\u00e1 tr\u1ecb ng\u1eabu nhi\u00ean &#8211; v\u00e0o \u0111\u00f3. \u0110i\u1ec1u n\u00e0y l\u00e0m cho m\u1ed7i m\u00e3 h\u00f3a l\u00e0 duy nh\u1ea5t, ngay c\u1ea3 khi m\u00e3 h\u00f3a c\u00f9ng m\u1ed9t b\u1ea3n r\u00f5 nhi\u1ec1u l\u1ea7n. Ngo\u00e0i ra, h\u00e3y tr\u00e1nh c\u00e1c ph\u01b0\u01a1ng ph\u00e1p m\u00e3 h\u00f3a \u0111\u01b0\u1ee3c bi\u1ebft l\u00e0 d\u1ec5 b\u1ecb t\u1ea5n c\u00f4ng b\u1eb1ng <\/span><i><span style=\"font-weight: 400\">plaintext <\/span><\/i><span style=\"font-weight: 400\">\u0111\u00e3 bi\u1ebft. \u0110i\u1ec1u \u0111\u00f3 n\u00f3i r\u1eb1ng, h\u00e3y th\u1ef1c hi\u1ec7n th\u1ea9m \u0111\u1ecbnh th\u00edch h\u1ee3p khi ch\u1ecdn thu\u1eadt to\u00e1n m\u00e3 h\u00f3a.<\/span><\/p>\n<p><span style=\"font-weight: 400\">V\u1eady l\u00e0 ch\u00fang ta \u0111\u00e3 c\u00f9ng nhau t\u00ecm hi\u1ec3u v\u1ec1 <strong>Known-plaintext Attacks<\/strong>. Hy v\u1ecdng b\u00e0i vi\u1ebft \u0111\u00e3 gi\u00fap b\u1ea1n c\u00f3 th\u00eam ki\u1ebfn th\u1ee9c v\u1ec1 lo\u1ea1i h\u00ecnh t\u1ea5n c\u00f4ng n\u00e0y, b\u00ean c\u1ea1nh s\u1ef1 so s\u00e1nh v\u1edbi <strong>Chosen-plaintext Attacks<\/strong>. \u0110\u1eebng qu\u00ean, m\u1ecdi th\u1eafc m\u1eafc v\u1ec1 th\u1ecb tr\u01b0\u1eddng ti\u1ec1n k\u1ef9 thu\u1eadt s\u1ed1, vui l\u00f2ng li\u00ean h\u1ec7 \u0111\u1ed9i ng\u0169 Support c\u1ee7a <a href=\"https:\/\/www.fiahub.com\">Fiahub<\/a> 24\/7.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Th\u1ebf n\u00e0o l\u00e0 Known-plaintext Attacks? Known-plaintext attacks (KPA) l\u00e0 khi tin t\u1eb7c s\u1eed d\u1ee5ng c\u00e1c c\u1eb7p t\u00e0i li\u1ec7u n\u1ed5i ti\u1ebfng\u00a0\u0111\u01b0\u1ee3c m\u00e3 h\u00f3a v\u00e0 kh\u00f4ng \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh thu\u1eadt to\u00e1n ho\u1eb7c kh\u00f3a m\u00e3 h\u00f3a. Trong m\u1ed9t Known-plaintext Attacks, k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 quy\u1ec1n truy c\u1eadp v\u00e0o c\u1ea3 d\u1ea1ng m\u00e3 h\u00f3a c\u1ee7a d\u1eef li\u1ec7u<\/p>\n","protected":false},"author":24,"featured_media":22997,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21850],"tags":[23030,23031],"class_list":{"0":"post-22993","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-tu-dien-crypto","8":"tag-crypto-attacks","9":"tag-defi-attacks"},"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>Known-plaintext Attacks l\u00e0 g\u00ec? - Fiahub<\/title>\n<meta name=\"description\" content=\"Known-plaintext attacks l\u00e0 khi tin t\u1eb7c s\u1eed d\u1ee5ng c\u00e1c c\u1eb7p t\u00e0i li\u1ec7u n\u1ed5i ti\u1ebfng \u0111\u01b0\u1ee3c\/kh\u00f4ng \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh thu\u1eadt to\u00e1n\/kh\u00f3a m\u00e3 h\u00f3a.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.fiahub.com\/blog\/known-plaintext-attacks-la-gi\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Known-plaintext Attacks l\u00e0 g\u00ec?\" \/>\n<meta property=\"og:description\" content=\"Known-plaintext attacks l\u00e0 khi tin t\u1eb7c s\u1eed d\u1ee5ng c\u00e1c c\u1eb7p t\u00e0i li\u1ec7u n\u1ed5i ti\u1ebfng \u0111\u01b0\u1ee3c\/kh\u00f4ng \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh thu\u1eadt to\u00e1n\/kh\u00f3a m\u00e3 h\u00f3a.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.fiahub.com\/blog\/known-plaintext-attacks-la-gi\/\" \/>\n<meta property=\"og:site_name\" content=\"Fiahub Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/FiahubVN\/\" \/>\n<meta property=\"article:published_time\" content=\"2023-09-17T03:00:35+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2023\/09\/Fiahub_Glossary_knownplaintextattacks.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"576\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Le Hoang\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@FIAHUBVN\" \/>\n<meta name=\"twitter:site\" content=\"@FIAHUBVN\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Le Hoang\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"11 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.fiahub.com\\\/blog\\\/known-plaintext-attacks-la-gi\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.fiahub.com\\\/blog\\\/known-plaintext-attacks-la-gi\\\/\"},\"author\":{\"name\":\"Le Hoang\",\"@id\":\"https:\\\/\\\/www.fiahub.com\\\/blog\\\/#\\\/schema\\\/person\\\/438ca2054bd04d8ef374b9dd54ed3418\"},\"headline\":\"Known-plaintext Attacks l\u00e0 g\u00ec?\",\"datePublished\":\"2023-09-17T03:00:35+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.fiahub.com\\\/blog\\\/known-plaintext-attacks-la-gi\\\/\"},\"wordCount\":2178,\"publisher\":{\"@id\":\"https:\\\/\\\/www.fiahub.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.fiahub.com\\\/blog\\\/known-plaintext-attacks-la-gi\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.fiahub.com\\\/blog\\\/wp-content\\\/uploads\\\/2023\\\/09\\\/Fiahub_Glossary_knownplaintextattacks.png\",\"keywords\":[\"crypto attacks\",\"defi attacks\"],\"articleSection\":[\"T\u1eeb \u0111i\u1ec3n Crypto\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.fiahub.com\\\/blog\\\/known-plaintext-attacks-la-gi\\\/\",\"url\":\"https:\\\/\\\/www.fiahub.com\\\/blog\\\/known-plaintext-attacks-la-gi\\\/\",\"name\":\"Known-plaintext Attacks l\u00e0 g\u00ec? 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