{"id":10064,"date":"2021-08-13T08:00:33","date_gmt":"2021-08-13T01:00:33","guid":{"rendered":"https:\/\/www.fiahub.com\/blog\/?p=10064"},"modified":"2025-06-11T20:09:26","modified_gmt":"2025-06-11T13:09:26","slug":"tan-cong-51-51-attack-anh-huong-den-blockchain-nhu-the-nao","status":"publish","type":"post","link":"https:\/\/www.fiahub.com\/blog\/tan-cong-51-51-attack-anh-huong-den-blockchain-nhu-the-nao\/","title":{"rendered":"T\u1ea5n c\u00f4ng 51% (51% Attack) \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn blockchain nh\u01b0 th\u1ebf n\u00e0o?"},"content":{"rendered":"\r\n<p>T\u1ea5n c\u00f4ng 51% l\u00e0 m\u1ed9t s\u1ef1 ki\u1ec7n nghi\u00eam tr\u1ecdng v\u00e0 r\u1ea5t nguy hi\u1ec3m cho c\u1ed9ng \u0111\u1ed3ng b\u1ea5t c\u1ee9 lo\u1ea1i coin n\u00e0o n\u1ebfu g\u1eb7p ph\u1ea3i. Nhi\u1ec1u \u0111\u1ed3ng coin l\u1edbn \u0111\u00e3 \u0111i\u00ean \u0111\u1ea3o trong m\u1ed9t th\u1eddi gian d\u00e0i m\u1edbi c\u00f3 th\u1ec3 l\u1ea5y l\u1ea1i v\u1ecb tr\u00ed c\u1ee7a m\u00ecnh. Th\u1eadm ch\u00ed nhi\u1ec1u \u0111\u1ed3ng coin b\u1ecb t\u00e0n ph\u00e1 n\u1eb7ng n\u1ec1 v\u00e0 kh\u00f4ng th\u1ec3 quay tr\u1edf l\u1ea1i. Nghe th\u00ec nghi\u00eam tr\u1ecdng v\u1eady, nh\u01b0ng th\u1ef1c t\u1ebf t\u1ea5n c\u00f4ng 51% l\u00e0 g\u00ec v\u00e0 n\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn blockchain nh\u01b0 th\u1ebf n\u00e0o? H\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u ngay trong b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y c\u1ee7a Fiahub nh\u00e9!\u00a0<\/p>\r\n\r\n\r\n\r\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_79_2 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\/tan-cong-51-51-attack-anh-huong-den-blockchain-nhu-the-nao\/#Tan_cong_51_la_gi\" >T\u1ea5n c\u00f4ng 51% l\u00e0 g\u00ec?\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\/tan-cong-51-51-attack-anh-huong-den-blockchain-nhu-the-nao\/#Muc_dich_cua_cuoc_tan_cong_51\" >M\u1ee5c \u0111\u00edch c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng 51%\u00a0<\/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\/tan-cong-51-51-attack-anh-huong-den-blockchain-nhu-the-nao\/#Dac_diem_cua_cuoc_tan_cong_51\" >\u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng 51%<\/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\/tan-cong-51-51-attack-anh-huong-den-blockchain-nhu-the-nao\/#Boi_canh_ve_cuoc_tan_cong_51\" >B\u1ed1i c\u1ea3nh v\u1ec1 cu\u1ed9c t\u1ea5n c\u00f4ng 51%<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.fiahub.com\/blog\/tan-cong-51-51-attack-anh-huong-den-blockchain-nhu-the-nao\/#Mot_cuoc_tan_cong_51_dien_ra_nhu_the_nao\" >M\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng 51% di\u1ec5n ra nh\u01b0 th\u1ebf n\u00e0o?\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.fiahub.com\/blog\/tan-cong-51-51-attack-anh-huong-den-blockchain-nhu-the-nao\/#Su_nguy_hai_cua_cuoc_tan_cong_51_doi_voi_blockchain\" >S\u1ef1 nguy h\u1ea1i c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng 51% \u0111\u1ed1i v\u1edbi blockchain<\/a><\/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\/tan-cong-51-51-attack-anh-huong-den-blockchain-nhu-the-nao\/#Cuoc_tan_cong_51_co_nghia_la_gi_doi_voi_cac_nha_dau_tu_tien_dien_tu\" >Cu\u1ed9c t\u1ea5n c\u00f4ng 51% c\u00f3 ngh\u0129a l\u00e0 g\u00ec \u0111\u1ed1i v\u1edbi c\u00e1c nh\u00e0 \u0111\u1ea7u t\u01b0 ti\u1ec1n \u0111i\u1ec7n t\u1eed\u00a0<\/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\/tan-cong-51-51-attack-anh-huong-den-blockchain-nhu-the-nao\/#Co_the_ngan_chan_duoc_tan_cong_51_hay_khong\" >C\u00f3 th\u1ec3 ng\u0103n ch\u1eb7n \u0111\u01b0\u1ee3c t\u1ea5n c\u00f4ng 51% hay kh\u00f4ng?\u00a0<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Tan_cong_51_la_gi\"><\/span>T\u1ea5n c\u00f4ng 51% l\u00e0 g\u00ec?\u00a0<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>Cu\u1ed9c t\u1ea5n c\u00f4ng 51% l\u00e0 khi m\u1ed9t ng\u01b0\u1eddi khai th\u00e1c ti\u1ec1n \u0111i\u1ec7n t\u1eed ho\u1eb7c m\u1ed9t nh\u00f3m ng\u01b0\u1eddi khai th\u00e1c gi\u00e0nh quy\u1ec1n ki\u1ec3m so\u00e1t h\u01a1n 50% blockchain c\u1ee7a m\u1ea1ng. C\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng nh\u01b0 v\u1eady l\u00e0 m\u1ed9t trong nh\u1eefng m\u1ed1i \u0111e d\u1ecda \u0111\u00e1ng k\u1ec3 nh\u1ea5t \u0111\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi s\u1eed d\u1ee5ng v\u00e0 mua ti\u1ec1n \u0111i\u1ec7n t\u1eed. Lo ng\u1ea1i h\u01a1n l\u00e0 c\u00e1c giao d\u1ecbch c\u00f3 th\u1ec3 b\u1ecb \u0111\u1ea3o ng\u01b0\u1ee3c khi nh\u00f3m \u0111\u1ed1i t\u01b0\u1ee3ng n\u00e0y c\u1ed1 g\u1eafng ki\u1ec3m so\u00e1t to\u00e0n b\u1ed9 m\u1ea1ng l\u01b0\u1edbi.\u00a0<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Muc_dich_cua_cuoc_tan_cong_51\"><\/span>M\u1ee5c \u0111\u00edch c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng 51%\u00a0<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>Nh\u1eefng k\u1ebb t\u1ea5n c\u00f4ng s\u1eed d\u1ee5ng c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng 51% \u0111\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c c\u00e1c giao d\u1ecbch \u0111\u00e3 di\u1ec5n ra, trong m\u1ed9t chu\u1ed7i kh\u1ed1i. H\u00e0nh \u0111\u1ed9ng n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 chi ti\u00eau g\u1ea5p \u0111\u00f4i.\u00a0<\/p>\r\n\r\n\r\n\r\n<p>V\u00ed d\u1ee5, m\u1ed9t ng\u01b0\u1eddi c\u00f3 th\u1ec3 chi 5 bitcoin \u0111\u1ec3 mua m\u1ed9t chi\u1ebfc xe m\u00e1y. Khi chi\u1ebfc xe \u0111\u1ea1p \u0111\u01b0\u1ee3c giao, logic ra l\u1ec7nh r\u1eb1ng Bitcoin s\u1ebd \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ec3 ph\u1ee5c v\u1ee5 cho chi ph\u00ed c\u1ee7a chi\u1ebfc xe \u0111\u1ea1p v\u00e0 c\u00f3 th\u1ec3 k\u00edch ho\u1ea1t cu\u1ed9c t\u1ea5n c\u00f4ng. Tuy nhi\u00ean, khi th\u1ef1c hi\u1ec7n m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng 51%, k\u1ebb t\u1ea5n c\u00f4ng s\u1ebd c\u00f3 th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c m\u1ed9t giao d\u1ecbch d\u1eabn \u0111\u1ebfn t\u1ea5t c\u1ea3 c\u00e1c \u0111\u1ed3ng ti\u1ec1n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u00e0i tr\u1ee3 cho giao d\u1ecbch \u0111\u01b0\u1ee3c ho\u00e0n l\u1ea1i. Cu\u1ed1i c\u00f9ng, k\u1ebb t\u1ea5n c\u00f4ng s\u1ebd l\u00e0 ch\u1ee7 s\u1edf h\u1eefu c\u1ee7a chi\u1ebfc xe m\u00e1y c\u0169ng nh\u01b0 s\u1ed1 bitcoin \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 mua n\u00f3.<\/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=\"650\" height=\"409\" class=\"wp-image-10065\" src=\"https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/08\/51-attack-1.jpg\" alt=\"T\u1ea5n c\u00f4ng 51% \" srcset=\"https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/08\/51-attack-1.jpg 650w, https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/08\/51-attack-1-150x94.jpg 150w, https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/08\/51-attack-1-300x189.jpg 300w\" sizes=\"(max-width: 650px) 100vw, 650px\" \/>\r\n<figcaption><span class=\"tadv-color\" style=\"color: #444444;\">T\u1ea5n c\u00f4ng 51% c\u00f3 th\u1ec3 g\u00e2y ra b\u1edfi c\u00e1 nh\u00e2n ho\u1eb7c t\u1eadp th\u1ec3 th\u1ee3 \u0111\u00e0o<\/span><\/figcaption>\r\n<\/figure>\r\n<\/div>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dac_diem_cua_cuoc_tan_cong_51\"><\/span>\u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng 51%<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>K\u1ecbch b\u1ea3n t\u1ea5n c\u00f4ng 51% l\u00e0 r\u1ea5t hi\u1ebfm, ph\u1ea7n l\u1edbn l\u00e0 do h\u1eadu c\u1ea7n, ph\u1ea7n c\u1ee9ng v\u00e0 chi ph\u00ed c\u1ea7n thi\u1ebft \u0111\u1ec3 th\u1ef1c hi\u1ec7n m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng. Nh\u01b0ng m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng kh\u1ed1i th\u00e0nh c\u00f4ng c\u00f3 th\u1ec3 g\u00e2y ra nh\u1eefng h\u1eadu qu\u1ea3 s\u00e2u r\u1ed9ng cho th\u1ecb tr\u01b0\u1eddng ti\u1ec1n \u0111i\u1ec7n t\u1eed v\u00e0 nh\u1eefng ng\u01b0\u1eddi \u0111\u1ea7u t\u01b0 v\u00e0o n\u00f3.\u00a0<\/p>\r\n\r\n\r\n\r\n<p>\u0110\u1ea7u t\u01b0 ti\u1ec1n \u0111i\u1ec7n t\u1eed c\u00f3 th\u1ec3 ti\u1ec1m n\u0103ng sinh l\u1ee3i nh\u01b0ng n\u00f3 c\u00f3 m\u1ee9c \u0111\u1ed9 r\u1ee7i ro cao h\u01a1n so v\u1edbi \u0111\u1ea7u t\u01b0 c\u1ed5 phi\u1ebfu ho\u1eb7c tr\u00e1i phi\u1ebfu. N\u1ebfu m\u1ed9t nh\u00e0 \u0111\u1ea7u t\u01b0 \u0111ang xem x\u00e9t th\u00eam c\u00e1c lo\u1ea1i ti\u1ec1n k\u1ef9 thu\u1eadt s\u1ed1 v\u00e0o danh m\u1ee5c \u0111\u1ea7u t\u01b0 c\u1ee7a h\u1ecd, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i hi\u1ec3u \u00fd ngh\u0129a c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng 51%.<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Boi_canh_ve_cuoc_tan_cong_51\"><\/span>B\u1ed1i c\u1ea3nh v\u1ec1 cu\u1ed9c t\u1ea5n c\u00f4ng 51%<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>T\u1ea5n c\u00f4ng 51% l\u00e0 m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng v\u00e0o m\u1ed9t blockchain, l\u00e0 m\u1ed9t lo\u1ea1i c\u01a1 s\u1edf d\u1eef li\u1ec7u k\u1ef9 thu\u1eadt s\u1ed1 \u1edf d\u1ea1ng s\u1ed5 c\u00e1i. V\u1edbi c\u00f4ng ngh\u1ec7 blockchain, th\u00f4ng tin \u0111\u01b0\u1ee3c thu th\u1eadp c\u00f9ng nhau theo nh\u00f3m ho\u1eb7c kh\u1ed1i v\u00e0 li\u00ean k\u1ebft v\u1edbi nhau \u0111\u1ec3 t\u1ea1o ra m\u1ed9t chu\u1ed7i d\u1eef li\u1ec7u.\u00a0<\/p>\r\n\r\n\r\n\r\n<p>Trong giao d\u1ecbch ti\u1ec1n \u0111i\u1ec7n t\u1eed, blockchain \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ghi l\u1ea1i c\u00e1c giao d\u1ecbch chuy\u1ec3n ti\u1ec1n k\u1ef9 thu\u1eadt s\u1ed1 \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t v\u00e0 vi\u1ec7c khai th\u00e1c ti\u1ec1n \u0111i\u1ec7n t\u1eed ho\u1eb7c m\u00e3 th\u00f4ng b\u00e1o.\u00a0 V\u00ed d\u1ee5: v\u1edbi Bitcoin, \u201cth\u1ee3 \u0111\u00e0o\u201d c\u00f3 th\u1ec3 c\u1ed1 g\u1eafng th\u00eam c\u00e1c kh\u1ed1i v\u00e0o chu\u1ed7i b\u1eb1ng c\u00e1ch gi\u1ea3i c\u00e1c b\u00e0i to\u00e1n th\u00f4ng qua vi\u1ec7c s\u1eed d\u1ee5ng m\u00e1y khai th\u00e1c.\u00a0<\/p>\r\n\r\n\r\n\r\n<p>C\u00e1c m\u00e1y n\u00e0y th\u1ef1c ch\u1ea5t l\u00e0 m\u1ed9t m\u1ea1ng m\u00e1y t\u00ednh. N\u1ebfu nh\u1eefng ng\u01b0\u1eddi khai th\u00e1c th\u00e0nh c\u00f4ng trong vi\u1ec7c th\u00eam m\u1ed9t kh\u1ed1i v\u00e0o chu\u1ed7i, h\u1ecd s\u1ebd nh\u1eadn l\u1ea1i Bitcoin.\u00a0 T\u1ed1c \u0111\u1ed9 m\u00e0 t\u1ea5t c\u1ea3 c\u00e1c m\u00e1y khai th\u00e1c trong m\u1ea1ng ho\u1ea1t \u0111\u1ed9ng l\u00e0 t\u1ed1c \u0111\u1ed9 b\u0103m Bitcoin. M\u1ed9t hashrate t\u1ed1t c\u00f3 th\u1ec3 gi\u00fap \u0111\u00e1nh gi\u00e1 t\u00ecnh tr\u1ea1ng c\u1ee7a m\u1ea1ng.\u00a0\u00a0<\/p>\r\n\r\n\r\n\r\n<p>Cu\u1ed9c t\u1ea5n c\u00f4ng 51% x\u1ea3y ra khi m\u1ed9t ho\u1eb7c nhi\u1ec1u ng\u01b0\u1eddi khai th\u00e1c ki\u1ec3m so\u00e1t h\u01a1n 50% s\u1ee9c m\u1ea1nh khai th\u00e1c, s\u1ee9c m\u1ea1nh t\u00ednh to\u00e1n ho\u1eb7c t\u1ed1c \u0111\u1ed9 b\u0103m c\u1ee7a m\u1ea1ng. N\u1ebfu m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng 51% th\u00e0nh c\u00f4ng, c\u00e1c th\u1ee3 m\u1ecf ch\u1ecbu tr\u00e1ch nhi\u1ec7m v\u1ec1 c\u01a1 b\u1ea3n ki\u1ec3m so\u00e1t m\u1ea1ng v\u00e0 c\u00e1c giao d\u1ecbch nh\u1ea5t \u0111\u1ecbnh x\u1ea3y ra trong \u0111\u00f3.<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Mot_cuoc_tan_cong_51_dien_ra_nhu_the_nao\"><\/span>M\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng 51% di\u1ec5n ra nh\u01b0 th\u1ebf n\u00e0o?\u00a0<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>Khi m\u1ed9t giao d\u1ecbch ti\u1ec1n \u0111i\u1ec7n t\u1eed di\u1ec5n ra, cho d\u00f9 n\u00f3 li\u00ean quan \u0111\u1ebfn Bitcoin hay m\u1ed9t lo\u1ea1i ti\u1ec1n k\u1ef9 thu\u1eadt s\u1ed1 kh\u00e1c, c\u00e1c kh\u1ed1i m\u1edbi \u0111\u01b0\u1ee3c khai th\u00e1c ph\u1ea3i \u0111\u01b0\u1ee3c x\u00e1c th\u1ef1c b\u1edfi s\u1ef1 \u0111\u1ed3ng thu\u1eadn c\u1ee7a c\u00e1c n\u00fat ho\u1eb7c m\u00e1y t\u00ednh \u0111\u01b0\u1ee3c g\u1eafn v\u00e0o m\u1ea1ng. Sau khi x\u00e1c th\u1ef1c n\u00e0y x\u1ea3y ra, kh\u1ed1i c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u00eam v\u00e0o chu\u1ed7i.<\/p>\r\n\r\n\r\n\r\n<p>Chu\u1ed7i kh\u1ed1i ch\u1ee9a m\u1ed9t b\u1ea3n ghi c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c giao d\u1ecbch m\u00e0 b\u1ea5t k\u1ef3 ai c\u0169ng c\u00f3 th\u1ec3 xem b\u1ea5t k\u1ef3 l\u00fac n\u00e0o. H\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef h\u1ed3 s\u01a1 n\u00e0y \u0111\u01b0\u1ee3c ph\u00e2n c\u1ea5p, c\u00f3 ngh\u0129a l\u00e0 kh\u00f4ng c\u00f3 c\u00e1 nh\u00e2n ho\u1eb7c t\u1ed5 ch\u1ee9c n\u00e0o c\u00f3 quy\u1ec1n ki\u1ec3m so\u00e1t n\u00f3. C\u00e1c n\u00fat ho\u1eb7c h\u1ec7 th\u1ed1ng m\u00e1y t\u00ednh kh\u00e1c nhau ho\u1ea1t \u0111\u1ed9ng c\u00f9ng nhau \u0111\u1ec3 khai th\u00e1c v\u00ec v\u1eady hashrate cho m\u1ed9t m\u1ea1ng c\u1ee5 th\u1ec3 c\u0169ng \u0111\u01b0\u1ee3c ph\u00e2n c\u1ea5p.<\/p>\r\n\r\n\r\n\r\n<p>Tuy nhi\u00ean, khi ph\u1ea7n l\u1edbn hashrate \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t b\u1edfi m\u1ed9t ho\u1eb7c nhi\u1ec1u th\u1ee3 \u0111\u00e0o trong m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng 51%, m\u1ea1ng l\u01b0\u1edbi ti\u1ec1n \u0111i\u1ec7n t\u1eed b\u1ecb gi\u00e1n \u0111o\u1ea1n. Nh\u1eefng ng\u01b0\u1eddi ch\u1ecbu tr\u00e1ch nhi\u1ec7m cho m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng 51% sau \u0111\u00f3 s\u1ebd c\u00f3 th\u1ec3:<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>Lo\u1ea1i tr\u1eeb c\u00e1c giao d\u1ecbch m\u1edbi \u0111\u01b0\u1ee3c ghi l\u1ea1i\u00a0<\/li>\r\n<li>S\u1eeda \u0111\u1ed5i th\u1ee9 t\u1ef1 c\u00e1c giao d\u1ecbch\u00a0<\/li>\r\n<li>Ng\u0103n c\u00e1c giao d\u1ecbch kh\u00f4ng \u0111\u01b0\u1ee3c x\u00e1c th\u1ef1c ho\u1eb7c x\u00e1c nh\u1eadn\u00a0<\/li>\r\n<li>Ch\u1eb7n c\u00e1c th\u1ee3 m\u1ecf kh\u00e1c khai th\u00e1c ti\u1ec1n ho\u1eb7c m\u00e3 th\u00f4ng b\u00e1o trong m\u1ea1ng\u00a0<\/li>\r\n<li>\u0110\u1ea3o ng\u01b0\u1ee3c c\u00e1c giao d\u1ecbch th\u00e0nh s\u1ed1 ti\u1ec1n chi ti\u00eau g\u1ea5p \u0111\u00f4i<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p>T\u1ea5t c\u1ea3 nh\u1eefng t\u00e1c d\u1ee5ng ph\u1ee5 n\u00e0y c\u1ee7a m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng kh\u1ed1i c\u00f3 th\u1ec3 l\u00e0 v\u1ea5n \u0111\u1ec1 \u0111\u1ed1i v\u1edbi c\u00e1c nh\u00e0 \u0111\u1ea7u t\u01b0 ti\u1ec1n \u0111i\u1ec7n t\u1eed v\u00e0 nh\u1eefng ng\u01b0\u1eddi ch\u1ea5p nh\u1eadn ti\u1ec1n k\u1ef9 thu\u1eadt s\u1ed1 nh\u01b0 m\u1ed9t h\u00ecnh th\u1ee9c thanh to\u00e1n.\u00a0<\/p>\r\n\r\n\r\n\r\n<p>V\u00ed d\u1ee5: m\u1ed9t k\u1ecbch b\u1ea3n chi ti\u00eau g\u1ea5p \u0111\u00f4i s\u1ebd cho ph\u00e9p ai \u0111\u00f3 thanh to\u00e1n cho th\u1ee9 g\u00ec \u0111\u00f3 b\u1eb1ng ti\u1ec1n \u0111i\u1ec7n t\u1eed, sau \u0111\u00f3 \u0111\u1ea3o ng\u01b0\u1ee3c giao d\u1ecbch sau khi th\u1ef1c t\u1ebf. H\u1ecd th\u1ef1c s\u1ef1 c\u00f3 th\u1ec3 gi\u1eef b\u1ea5t c\u1ee9 th\u1ee9 g\u00ec h\u1ecd \u0111\u00e3 mua c\u00f9ng v\u1edbi ti\u1ec1n \u0111i\u1ec7n t\u1eed \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong giao d\u1ecbch, giao d\u1ecbch v\u1edbi ng\u01b0\u1eddi b\u00e1n.<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Su_nguy_hai_cua_cuoc_tan_cong_51_doi_voi_blockchain\"><\/span>S\u1ef1 nguy h\u1ea1i c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng 51% \u0111\u1ed1i v\u1edbi blockchain<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>H\u1ea7u h\u1ebft Bitcoin hay c\u00e1c \u0111\u1ed3ng ti\u1ec1n \u0111i\u1ec7n t\u1eed kh\u00e1c \u0111\u1ec1u d\u1ef1a v\u00e0o Blockchain. \u0110\u00e2y l\u00e0 n\u01a1i l\u01b0u tr\u1eef ho\u00e0n to\u00e0n th\u00f4ng tin d\u1eef li\u1ec7u giao d\u1ecbch c\u1ee7a c\u00e1c traders. V\u1eady n\u00ean blockchain s\u1ebd c\u1ef1c k\u1ef3 quan tr\u1ecdng trong th\u1ecb tr\u01b0\u1eddng ti\u1ec1n \u0111i\u1ec7n t\u1eed.\u00a0<\/p>\r\n\r\n\r\n\r\n<p>Tuy nhi\u00ean, v\u1edbi vi\u1ec7c c\u00e1c th\u1ee3 \u0111\u00e0o c\u1ed1 g\u1eafng ki\u1ec3m so\u00e1t h\u01a1n 50% s\u1ee9c m\u1ea1nh khai th\u00e1c c\u1ee7a m\u1ea1ng l\u01b0\u1edbi, th\u00ec vi\u1ec7c ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c qu\u00e1 tr\u00ecnh t\u1ea1o block m\u1edbi tr\u00ean blockchain l\u00e0 chuy\u1ec7n d\u0129 nhi\u00ean. \u0110i\u1ec1u g\u00ec s\u1ebd x\u1ea3y ra?\u00a0<\/p>\r\n\r\n\r\n\r\n<p>Nh\u1eefng \u0111\u1ed1i t\u01b0\u1ee3ng t\u1ea5n c\u00f4ng s\u1ebd chi\u1ebfm \u0111\u1ed9c quy\u1ec1n v\u00e0 khai th\u00e1c to\u00e0n b\u1ed9 ph\u1ea7n th\u01b0\u1edfng t\u1eeb vi\u1ec7c khai th\u00e1c tr\u00ean c\u00e1c block. Kh\u00f4ng d\u1eebng l\u1ea1i \u1edf \u0111\u00f3, h\u1ecd c\u00f2n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng l\u1ea5y l\u1ea1i s\u1ed1 ti\u1ec1n \u0111\u00e3 g\u1eedi \u0111i v\u1ec1 t\u00fai c\u1ee7a m\u00ecnh th\u00f4ng qua h\u00ecnh th\u1ee9c Double Spend.\u00a0<\/p>\r\n\r\n\r\n\r\n<div class=\"wp-block-image\">\r\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"650\" height=\"313\" class=\"wp-image-10066\" src=\"https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/08\/51-attack-2.jpg\" alt=\"T\u1ea5n c\u00f4ng 51% \u1ea3nh h\u01b0\u1edfng nghi\u00eam trong \u0111\u1ebfn d\u1eef li\u1ec7u blockchain\" srcset=\"https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/08\/51-attack-2.jpg 650w, https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/08\/51-attack-2-150x72.jpg 150w, https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/08\/51-attack-2-300x144.jpg 300w\" sizes=\"(max-width: 650px) 100vw, 650px\" \/>\r\n<figcaption><span class=\"tadv-color\" style=\"color: #444444;\">Di\u1ec5n bi\u1ebfn t\u1ea5n c\u00f4ng 51%<\/span><\/figcaption>\r\n<\/figure>\r\n<\/div>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cuoc_tan_cong_51_co_nghia_la_gi_doi_voi_cac_nha_dau_tu_tien_dien_tu\"><\/span>Cu\u1ed9c t\u1ea5n c\u00f4ng 51% c\u00f3 ngh\u0129a l\u00e0 g\u00ec \u0111\u1ed1i v\u1edbi c\u00e1c nh\u00e0 \u0111\u1ea7u t\u01b0 ti\u1ec1n \u0111i\u1ec7n t\u1eed\u00a0<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>M\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng 51% kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t s\u1ef1 xu\u1ea5t hi\u1ec7n ph\u1ed5 bi\u1ebfn nh\u01b0ng n\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 \u0111i\u1ec1u c\u00f3 th\u1ec3 lo\u1ea1i b\u1ecf. \u0110\u1ed1i v\u1edbi c\u00e1c nh\u00e0 \u0111\u1ea7u t\u01b0 ti\u1ec1n \u0111i\u1ec7n t\u1eed, r\u1ee7i ro l\u1edbn nh\u1ea5t li\u00ean quan \u0111\u1ebfn cu\u1ed9c t\u1ea5n c\u00f4ng 51% c\u00f3 th\u1ec3 l\u00e0 s\u1ef1 m\u1ea5t gi\u00e1 c\u1ee7a m\u1ed9t lo\u1ea1i ti\u1ec1n k\u1ef9 thu\u1eadt s\u1ed1 c\u1ee5 th\u1ec3.<\/p>\r\n\r\n\r\n\r\n<p>N\u1ebfu ti\u1ec1n \u0111i\u1ec7n t\u1eed th\u01b0\u1eddng xuy\u00ean b\u1ecb t\u1ea5n c\u00f4ng kh\u1ed1i, \u0111i\u1ec1u \u0111\u00f3 c\u00f3 th\u1ec3 khi\u1ebfn c\u00e1c nh\u00e0 \u0111\u1ea7u t\u01b0 m\u1ea5t ni\u1ec1m tin v\u00e0o th\u1ecb tr\u01b0\u1eddng. M\u1ed9t s\u1ef1 ki\u1ec7n nh\u01b0 v\u1eady c\u00f3 th\u1ec3 khi\u1ebfn gi\u00e1 ti\u1ec1n \u0111i\u1ec7n t\u1eed s\u1ee5p \u0111\u1ed5.<\/p>\r\n\r\n\r\n\r\n<p>Tin t\u1ed1t l\u00e0 c\u00f3 nh\u1eefng h\u1ea1n ch\u1ebf \u0111\u1ed1i v\u1edbi nh\u1eefng g\u00ec m\u1ed9t ng\u01b0\u1eddi khai th\u00e1c giai \u0111o\u1ea1n m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng 51% c\u00f3 th\u1ec3 l\u00e0m. V\u00ed d\u1ee5: ai \u0111\u00f3 th\u1ef1c hi\u1ec7n m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng kh\u1ed1i s\u1ebd kh\u00f4ng th\u1ec3:\u00a0<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>\u0110\u1ea3o ng\u01b0\u1ee3c c\u00e1c giao d\u1ecbch do ng\u01b0\u1eddi kh\u00e1c th\u1ef1c hi\u1ec7n\u00a0<\/li>\r\n<li>Thay \u0111\u1ed5i s\u1ed1 l\u01b0\u1ee3ng ti\u1ec1n xu ho\u1eb7c m\u00e3 th\u00f4ng b\u00e1o \u0111\u01b0\u1ee3c t\u1ea1o b\u1edfi m\u1ed9t kh\u1ed1i\u00a0<\/li>\r\n<li>T\u1ea1o ti\u1ec1n xu ho\u1eb7c m\u00e3 th\u00f4ng b\u00e1o m\u1edbi t\u1eeb kh\u00f4ng c\u00f3 g\u00ec\u00a0<\/li>\r\n<li>Giao d\u1ecbch b\u1eb1ng ti\u1ec1n xu ho\u1eb7c m\u00e3 th\u00f4ng b\u00e1o kh\u00f4ng thu\u1ed9c v\u1ec1 h\u1ecd<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p>C\u00e1c nh\u00e0 \u0111\u1ea7u t\u01b0 c\u00f3 th\u1ec3 t\u1ef1 b\u1ea3o v\u1ec7 m\u00ecnh tr\u01b0\u1edbc kh\u1ea3 n\u0103ng b\u1ecb t\u1ea5n c\u00f4ng 51% ph\u1ea7n tr\u0103m b\u1eb1ng c\u00e1ch \u0111\u1ea7u t\u01b0 v\u00e0o c\u00e1c m\u1ea1ng ti\u1ec1n \u0111i\u1ec7n t\u1eed l\u1edbn h\u01a1n, \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp nhi\u1ec1u h\u01a1n so v\u1edbi c\u00e1c m\u1ea1ng nh\u1ecf h\u01a1n. Blockchain c\u00e0ng l\u1edbn c\u00e0ng ph\u00e1t tri\u1ec3n, th\u00ec c\u00e0ng kh\u00f3 kh\u0103n h\u01a1n \u0111\u1ed1i v\u1edbi nh\u1eefng k\u1ebb \u0111\u00e0o ti\u1ec1n gi\u1ea3 m\u1ea1o \u0111\u1ec3 th\u1ef1c hi\u1ec7n m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng v\u00e0o n\u00f3. M\u1eb7t kh\u00e1c, c\u00e1c m\u1ea1ng nh\u1ecf h\u01a1n c\u00f3 th\u1ec3 d\u1ec5 b\u1ecb t\u1ea5n c\u00f4ng kh\u1ed1i h\u01a1n.<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Co_the_ngan_chan_duoc_tan_cong_51_hay_khong\"><\/span>C\u00f3 th\u1ec3 ng\u0103n ch\u1eb7n \u0111\u01b0\u1ee3c t\u1ea5n c\u00f4ng 51% hay kh\u00f4ng?\u00a0<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>M\u1ecdi blockchain c\u00f3 th\u1ec3 ng\u0103n ch\u1eb7n \u0111\u01b0\u1ee3c cu\u1ed9c t\u1ea5n c\u00f4ng 51% n\u1ebfu \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u00e0 x\u00e2y d\u1ef1ng h\u1ec7 th\u1ed1ng blockchain v\u1edbi s\u1ed1 l\u01b0\u1ee3ng giao d\u1ecbch \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn c\u00e0ng nhi\u1ec1u. \u0110\u00e2y c\u0169ng l\u00e0 l\u00ed do v\u00ec sao Bitcoin lu\u00f4n ch\u00fa tr\u1ecdng v\u1ec1 m\u1ed9t ng\u01b0\u1ee1ng s\u1ed1 l\u01b0\u1ee3ng giao d\u1ecbch \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn n\u00e0o \u0111\u00f3 tr\u01b0\u1edbc khi thanh to\u00e1n v\u00e0 ti\u1ebfn h\u00e0nh giao d\u1ecbch.\u00a0<\/p>\r\n\r\n\r\n\r\n<p>Tuy nhi\u00ean, kh\u00f4ng ph\u1ea3i m\u1ea1ng l\u01b0\u1edbi n\u00e0o c\u0169ng m\u1ea1nh v\u00e0 ph\u00e1t tri\u1ec3n nh\u01b0 Bitcoin. V\u1eady n\u00ean, h\u1ea7u h\u1ebft c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u1ea5y \u1edf nh\u1eefng chu\u1ed7i nh\u1ecf h\u01a1n.\u00a0<\/p>\r\n\r\n\r\n\r\n<p>Tr\u00ean \u0111\u00e2y l\u00e0 b\u00e0i vi\u1ebft chia s\u1ebb v\u1ec1 cu\u1ed9c t\u1ea5n c\u00f4ng 51% v\u00e0 nh\u1eefng \u1ea3nh h\u01b0\u1edfng c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng n\u00e0y \u0111\u1ed1i v\u1edbi m\u1ea1ng l\u01b0\u1edbi blockchain. Hy v\u1ecdng v\u1edbi nh\u1eefng th\u00f4ng tin tr\u00ean, b\u1ea1n \u0111\u00e3 c\u00f3 th\u1ec3 b\u1ecf t\u00fai cho m\u00ecnh nh\u1eefng ki\u1ebfn th\u1ee9c h\u1eefu \u00edch. \u0110\u1eebng qu\u00ean chia s\u1ebb ki\u1ebfn th\u1ee9c n\u00e0y c\u00f9ng v\u1edbi b\u1ea1n b\u00e8 c\u1ee7a m\u00ecnh nh\u00e9! <\/p>\r\n","protected":false},"excerpt":{"rendered":"<p>T\u1ea5n c\u00f4ng 51% l\u00e0 m\u1ed9t s\u1ef1 ki\u1ec7n nghi\u00eam tr\u1ecdng v\u00e0 r\u1ea5t nguy hi\u1ec3m cho c\u1ed9ng \u0111\u1ed3ng b\u1ea5t c\u1ee9 lo\u1ea1i coin n\u00e0o n\u1ebfu g\u1eb7p ph\u1ea3i. Nhi\u1ec1u \u0111\u1ed3ng coin l\u1edbn \u0111\u00e3 \u0111i\u00ean \u0111\u1ea3o trong m\u1ed9t th\u1eddi gian d\u00e0i m\u1edbi c\u00f3 th\u1ec3 l\u1ea5y l\u1ea1i v\u1ecb tr\u00ed c\u1ee7a m\u00ecnh. Th\u1eadm ch\u00ed nhi\u1ec1u \u0111\u1ed3ng coin b\u1ecb t\u00e0n ph\u00e1 n\u1eb7ng n\u1ec1<\/p>\n","protected":false},"author":23,"featured_media":10067,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"elementor_theme","format":"standard","meta":{"footnotes":""},"categories":[21850],"tags":[],"class_list":{"0":"post-10064","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-tu-dien-crypto"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.0 (Yoast SEO v26.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>T\u1ea5n c\u00f4ng 51% (51% Attack) \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn blockchain nh\u01b0 th\u1ebf n\u00e0o? - Fiahub<\/title>\n<meta name=\"description\" content=\"Cu\u1ed9c t\u1ea5n c\u00f4ng 51% l\u00e0 khi m\u1ed9t ng\u01b0\u1eddi khai th\u00e1c ti\u1ec1n \u0111i\u1ec7n t\u1eed ho\u1eb7c m\u1ed9t nh\u00f3m ng\u01b0\u1eddi khai th\u00e1c gi\u00e0nh quy\u1ec1n ki\u1ec3m so\u00e1t h\u01a1n 50% blockchain c\u1ee7a m\u1ea1ng....\" \/>\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\/tan-cong-51-51-attack-anh-huong-den-blockchain-nhu-the-nao\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"T\u1ea5n c\u00f4ng 51% (51% Attack) \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn blockchain nh\u01b0 th\u1ebf n\u00e0o?\" \/>\n<meta property=\"og:description\" content=\"Cu\u1ed9c t\u1ea5n c\u00f4ng 51% l\u00e0 khi m\u1ed9t ng\u01b0\u1eddi khai th\u00e1c ti\u1ec1n \u0111i\u1ec7n t\u1eed ho\u1eb7c m\u1ed9t nh\u00f3m ng\u01b0\u1eddi khai th\u00e1c gi\u00e0nh quy\u1ec1n ki\u1ec3m so\u00e1t h\u01a1n 50% blockchain c\u1ee7a m\u1ea1ng....\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.fiahub.com\/blog\/tan-cong-51-51-attack-anh-huong-den-blockchain-nhu-the-nao\/\" \/>\n<meta property=\"og:site_name\" content=\"Fiahub Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/FiahubVN\/\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/linhbuicycling\" \/>\n<meta property=\"article:published_time\" content=\"2021-08-13T01:00:33+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-06-11T13:09:26+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/08\/T\u1ea5n-c\u00f4ng-51-51-Attack-l\u00e0-g\u00ec.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"660\" \/>\n\t<meta property=\"og:image:height\" content=\"400\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Linh Bui\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@0xbuilink\" \/>\n<meta name=\"twitter:site\" content=\"@FIAHUBVN\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Linh Bui\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"8 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.fiahub.com\/blog\/tan-cong-51-51-attack-anh-huong-den-blockchain-nhu-the-nao\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.fiahub.com\/blog\/tan-cong-51-51-attack-anh-huong-den-blockchain-nhu-the-nao\/\"},\"author\":{\"name\":\"Linh Bui\",\"@id\":\"https:\/\/www.fiahub.com\/blog\/#\/schema\/person\/92f3543cf3a7888801f30fc1415d887c\"},\"headline\":\"T\u1ea5n c\u00f4ng 51% (51% Attack) \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn blockchain nh\u01b0 th\u1ebf n\u00e0o?\",\"datePublished\":\"2021-08-13T01:00:33+00:00\",\"dateModified\":\"2025-06-11T13:09:26+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.fiahub.com\/blog\/tan-cong-51-51-attack-anh-huong-den-blockchain-nhu-the-nao\/\"},\"wordCount\":2589,\"publisher\":{\"@id\":\"https:\/\/www.fiahub.com\/blog\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.fiahub.com\/blog\/tan-cong-51-51-attack-anh-huong-den-blockchain-nhu-the-nao\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/08\/T\u1ea5n-c\u00f4ng-51-51-Attack-l\u00e0-g\u00ec.jpg\",\"articleSection\":[\"T\u1eeb \u0111i\u1ec3n Crypto\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.fiahub.com\/blog\/tan-cong-51-51-attack-anh-huong-den-blockchain-nhu-the-nao\/\",\"url\":\"https:\/\/www.fiahub.com\/blog\/tan-cong-51-51-attack-anh-huong-den-blockchain-nhu-the-nao\/\",\"name\":\"T\u1ea5n c\u00f4ng 51% (51% Attack) \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn blockchain nh\u01b0 th\u1ebf n\u00e0o? 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