{"id":8574,"date":"2021-05-25T11:46:47","date_gmt":"2021-05-25T04:46:47","guid":{"rendered":"https:\/\/www.fiahub.com\/blog\/?p=8574"},"modified":"2021-11-23T20:34:28","modified_gmt":"2021-11-23T13:34:28","slug":"tim-hieu-ve-digital-signature-chu-ky-so-va-ung-dung-cua-no","status":"publish","type":"post","link":"https:\/\/www.fiahub.com\/blog\/tim-hieu-ve-digital-signature-chu-ky-so-va-ung-dung-cua-no\/","title":{"rendered":"T\u00ecm hi\u1ec3u v\u1ec1 Digital Signature (Ch\u1eef k\u00fd s\u1ed1) v\u00e0 \u1ee9ng d\u1ee5ng"},"content":{"rendered":"\n<p><span style=\"font-weight: 400; font-size: 14pt;\">Ch\u1eef k\u00fd s\u1ed1 hay ch\u1eef k\u00fd \u0111i\u1ec7n t\u1eed tr\u1edf n\u00ean ng\u00e0y c\u00e0ng ph\u1ed5 bi\u1ebfn, \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng thay th\u1ebf cho ch\u1eef k\u00fd vi\u1ebft tay th\u00f4ng th\u01b0\u1eddng trong doanh nghi\u1ec7p, t\u1ed5 ch\u1ee9c v\u00e0 \u0111\u01b0\u1ee3c ph\u00e1p l\u00fd c\u00f4ng nh\u1eadn. B\u1ea3n ch\u1ea5t c\u1ee7a ch\u1eef k\u00fd s\u1ed1 l\u00e0 s\u1ef1 bi\u1ebfn \u0111\u1ed5i th\u00f4ng \u0111i\u1ec7p th\u00e0nh d\u1eef li\u1ec7u, th\u00f4ng qua h\u1ec7 th\u1ed1ng m\u1eadt m\u00e3 kh\u00f4ng \u0111\u1ed1i x\u1ee9ng. Ngo\u00e0i vi\u1ec7c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c ho\u1ea1t \u0111\u1ed9ng kinh doanh th\u00f4ng th\u01b0\u1eddng, ch\u1eef k\u00fd s\u1ed1 c\u00f2n l\u00e0 nh\u00e2n t\u1ed1 quan tr\u1ecdng, y\u1ebfu t\u1ed1 \u0111\u1ea7u v\u00e0o c\u1ee7a c\u00f4ng ngh\u1ec7 blockchain trong vi\u1ec7c b\u1ea3o m\u1eadt v\u00e0 x\u00e1c th\u1ef1c giao d\u1ecbch.&nbsp;<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt;\">B\u00e0i vi\u1ebft h\u00f4m nay, h\u00e3y c\u00f9ng <a href=\"https:\/\/www.fiahub.com\">Fiahub<\/a> t\u00ecm hi\u1ec3u v\u1ec1 ch\u1eef k\u00fd s\u1ed1 nh\u00e9!<\/span><\/p>\n\n\n\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\/tim-hieu-ve-digital-signature-chu-ky-so-va-ung-dung-cua-no\/#The_nao_la_chu_ky_so\" >Th\u1ebf n\u00e0o l\u00e0 ch\u1eef k\u00fd s\u1ed1?<\/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\/tim-hieu-ve-digital-signature-chu-ky-so-va-ung-dung-cua-no\/#Co_che_hoat_dong_cua_chu_ky_so\" >C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ch\u1eef k\u00fd s\u1ed1<\/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\/tim-hieu-ve-digital-signature-chu-ky-so-va-ung-dung-cua-no\/#Ham_bam\" >H\u00e0m b\u0103m<\/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\/tim-hieu-ve-digital-signature-chu-ky-so-va-ung-dung-cua-no\/#Private_Key_Cryptography_%E2%80%93_Mat_ma_khoa_cong_khai\" >Private Key Cryptography &#8211; M\u1eadt m\u00e3 kh\u00f3a c\u00f4ng khai<\/a><\/li><\/ul><\/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\/tim-hieu-ve-digital-signature-chu-ky-so-va-ung-dung-cua-no\/#Vai_tro_cua_chu_ky_so\" >Vai tr\u00f2 c\u1ee7a ch\u1eef k\u00fd s\u1ed1<\/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\/tim-hieu-ve-digital-signature-chu-ky-so-va-ung-dung-cua-no\/#Ung_dung_Digital_Signature_trong_nhung_truong_hop_nao\" >\u1ee8ng d\u1ee5ng Digital Signature trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p n\u00e0o?<\/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\/tim-hieu-ve-digital-signature-chu-ky-so-va-ung-dung-cua-no\/#Mot_vai_diem_han_che_cua_chu_ky_so_Digital_Signature\" >M\u1ed9t v\u00e0i \u0111i\u1ec3m h\u1ea1n ch\u1ebf c\u1ee7a ch\u1eef k\u00fd s\u1ed1 Digital Signature<\/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\/tim-hieu-ve-digital-signature-chu-ky-so-va-ung-dung-cua-no\/#Ket_luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_nao_la_chu_ky_so\"><\/span>Th\u1ebf n\u00e0o l\u00e0 ch\u1eef k\u00fd s\u1ed1?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><span style=\"font-weight: 400; font-size: 14pt;\">Ch\u1eef k\u00fd s\u1ed1 l\u00e0 m\u1ed9t d\u1ea1ng m\u00e3 h\u00f3a d\u1eef li\u1ec7u, t\u1eeb \u0111\u00f3 gi\u00fap x\u00e1c th\u1ef1c th\u00f4ng tin v\u00e0 t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a h\u1ec7 th\u1ed1ng d\u1eef li\u1ec7u. B\u1ea1n c\u00f3 th\u1ec3 xem n\u00f3 nh\u01b0 m\u1ed9t d\u1ea1ng k\u1ef9 thu\u1eadt s\u1ed1 ch\u1eef k\u00fd vi\u1ebft tay truy\u1ec1n th\u1ed1ng, \u1edf m\u1ee9c \u0111\u1ed9 b\u1ea3o m\u1eadt v\u00e0 ph\u1ee9c t\u1ea1p h\u01a1n r\u1ea5t nhi\u1ec1u.&nbsp;<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt;\">Ch\u1eef k\u00fd s\u1ed1 \u0111\u01b0\u1ee3c d\u00f9ng k\u00e8m v\u1edbi c\u00e1c th\u01b0 \u0111i\u1ec7n t\u1eed hay tin nh\u1eafn, t\u00e0i li\u1ec7u \u0111\u1ec3 g\u1eedi \u0111i; gi\u1eef vai tr\u00f2 x\u00e1c nh\u1eadn th\u00f4ng tin kh\u00f4ng b\u1ecb gi\u1ea3 m\u1ea1o.<\/span><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/05\/ch\u1eef-k\u00fd-s\u1ed1-2-1024x422.jpg\" alt=\"Digital Signature, Ch\u1eef k\u00fd s\u1ed1, H\u00e0m b\u0103m, m\u1eadt m\u00e3 kho\u00e1 c\u00f4ng khai PKC\" class=\"wp-image-8575\" width=\"900\" height=\"600\"\/><figcaption><span style=\"color:#444444\" class=\"tadv-color\">Ch\u1eef k\u00fd s\u1ed1 l\u00e0 m\u1ed9t d\u1ea1ng d\u1eef li\u1ec7u m\u00e3 ho\u00e1, gi\u00fap b\u1ea3o m\u1eadt th\u00f4ng tin<\/span><\/figcaption><\/figure><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Co_che_hoat_dong_cua_chu_ky_so\"><\/span>C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ch\u1eef k\u00fd s\u1ed1<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><span style=\"font-weight: 400; font-size: 14pt;\">\u0110\u1ec3 hi\u1ec3u \u0111\u01b0\u1ee3c c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ch\u1eef k\u1ef9 s\u1ed1, b\u1ea1n c\u1ea7n n\u1eafm \u0111\u01b0\u1ee3c h\u00e0m b\u0103m v\u00e0 m\u1eadt m\u00e3 kh\u00f3a c\u00f4ng khai.<\/span><\/p>\n\n\n\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>\n\n\n\n<p><span style=\"font-weight: 400; font-size: 14pt;\">\u0110\u00e2y l\u00e0 y\u1ebfu t\u1ed1 ch\u00ednh trong x\u00e2y d\u1ef1ng ch\u1eef k\u00fd s\u1ed1. \u0110\u00e2y l\u00e0 qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u ban \u0111\u1ea7u v\u1edbi k\u00edch th\u01b0\u1edbc b\u1ea5t k\u1ef3, sang d\u1ea1ng d\u1eef li\u1ec7u \u0111\u1ea7u ra c\u00f3 k\u00edch th\u01b0\u1edbc ti\u00eau chu\u1ea9n c\u1ed1 \u0111\u1ecbnh. N\u00f3 ho\u1ea1t \u0111\u1ed9ng d\u1ef1a v\u00e0o thu\u1eadt to\u00e1n c\u00f3 t\u00ean l\u00e0 h\u00e0m b\u0103m. Khi \u0111\u00f3, d\u1eef li\u1ec7u \u0111\u1ea7u ra \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 gi\u00e1 tr\u1ecb b\u0103m.<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt;\">H\u00e0m b\u0103m m\u1eadt m\u00e3 l\u00e0 s\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa h\u00e0m b\u0103m v\u00e0 m\u1eadt m\u00e3; d\u00f9ng \u0111\u1ec3 t\u1ea1o l\u00e0 gi\u00e1 tr\u1ecb b\u0103m c\u00f3 t\u00e1c d\u1ee5ng nh\u01b0 m\u1ed9t d\u1ea5u v\u00e2n tay k\u1ef9 thu\u1eadt s\u1ed1 duy nh\u1ea5t. Ch\u1ec9 c\u1ea7n m\u1ed9t thay \u0111\u1ed5i nh\u1ecf trong d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o s\u1ebd t\u1ea1o ra m\u1ed9t gi\u00e1 tr\u1ecb b\u0103m ho\u00e0n to\u00e0n m\u1edbi. Nh\u1edd v\u1eady, h\u00e0m b\u0103m m\u1eadt m\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn trong vi\u1ec7c x\u00e1c th\u1ef1c t\u00ednh ch\u00ednh x\u00e1c c\u1ee7a c\u00e1c d\u1eef li\u1ec7u s\u1ed1 c\u1ee7a blockchain.<\/span><\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img decoding=\"async\" src=\"https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/05\/ch\u1eef-k\u00fd-s\u1ed1-3.jpg\" alt=\"Digital Signature, Ch\u1eef k\u00fd s\u1ed1, H\u00e0m b\u0103m, m\u1eadt m\u00e3 kho\u00e1 c\u00f4ng khai PKC\" class=\"wp-image-8576\" width=\"900\" height=\"600\"\/><figcaption><span style=\"color:#444444\" class=\"tadv-color\">H\u00e0m b\u0103m l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng trong h\u1ec7 th\u1ed1ng x\u00e2y d\u1ef1ng ch\u1eef k\u00fd s\u1ed1<\/span><\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Private_Key_Cryptography_%E2%80%93_Mat_ma_khoa_cong_khai\"><\/span>Private Key Cryptography &#8211; M\u1eadt m\u00e3 kh\u00f3a c\u00f4ng khai<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><span style=\"font-weight: 400; font-size: 14pt;\">M\u1eadt m\u00e3 kh\u00f3a c\u00f4ng khai (PKC) g\u1ed3m m\u1ed9t kh\u00f3a chung v\u00e0 m\u1ed9t kho\u00e1 ri\u00eang; ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong vi\u1ec7c m\u00e3 ho\u00e1 ch\u1eef k\u00fd s\u1ed1 v\u00e0 d\u1eef li\u1ec7u.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt;\">PKC an to\u00e0n h\u01a1n nhi\u1ec1u so v\u1edbi c\u00e1c thu\u1eadt to\u00e1n m\u00e3 ho\u00e1 \u0111\u1ed1i x\u1ee9ng th\u00f4ng th\u01b0\u1eddng; c\u1ee5 th\u1ec3 n\u00f3 cho ph\u00e9p d\u1eef li\u1ec7u m\u00e3 ho\u00e1 b\u1eb1ng kho\u00e1 chung; sau \u0111\u00f3 gi\u1ea3i m\u00e3 d\u1eef li\u1ec7u b\u1eb1ng kh\u00f3a ri\u00eang t\u01b0\u01a1ng th\u00edch.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt;\">V\u1edbi ch\u1eef k\u00fd s\u1ed1, PKC \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng nh\u01b0 m\u1ed9t h\u00e0m b\u0103m v\u1edbi d\u1eef li\u1ec7u, tin nh\u1eafn v\u00e0 kh\u00f3a ri\u00eang c\u1ee7a ng\u01b0\u1eddi k\u00fd t\u00ean. Ng\u01b0\u1eddi nh\u1eadn s\u1ebd xem x\u00e9t ch\u1eef k\u00fd ng\u01b0\u1eddi g\u1eedi c\u00f3 h\u1ee3p l\u1ec7 kh\u00f4ng nh\u1edd v\u00e0o kho\u00e1 do ng\u01b0\u1eddi g\u1eedi cung c\u1ea5p. N\u00f3i c\u00e1ch kh\u00e1c, \u1ee9ng d\u1ee5ng PKC trong ch\u1eef k\u00fd s\u1ed1 gi\u00fap t\u0103ng \u0111\u1ed9 b\u1ea3o m\u1eadt v\u00e0 t\u00ednh x\u00e1c minh d\u1eef li\u1ec7u c\u1ee7a blockchain.<\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Vai_tro_cua_chu_ky_so\"><\/span>Vai tr\u00f2 c\u1ee7a ch\u1eef k\u00fd s\u1ed1<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><span style=\"font-weight: 400; font-size: 14pt;\">Ch\u1eef k\u00fd s\u1ed1 &#8211; Digital Signature gi\u00fap d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c x\u00e1c th\u1ef1c v\u00e0 ch\u1ed1ng gi\u1ea3 m\u1ea1o, tho\u00e1i th\u00e1c.&nbsp;<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; font-size: 14pt;\">D\u1eef li\u1ec7u s\u1ebd \u0111\u01b0\u1ee3c gi\u1eef nguy\u00ean v\u1eb9n; v\u00e0 b\u1ea1n c\u00f3 th\u1ec3 ki\u1ec3m so\u00e1t n\u00f3 b\u1eb1ng vi\u1ec7c h\u1ec7 th\u1ed1ng ghi nh\u1eadn nh\u1eefng s\u1eeda \u0111\u1ed5i trong vi\u1ec7c m\u1ed9t ch\u1eef k\u1ef9 s\u1ed1 kh\u00e1c \u0111\u01b0\u1ee3c t\u1ea1o ra.&nbsp;<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; font-size: 14pt;\">M\u1ecdi th\u00f4ng tin \u0111\u01b0\u1ee3c x\u00e1c th\u1ef1c v\u00e0 gi\u1eef b\u1ea3o m\u1eadt, b\u1edfi ph\u1ea3i s\u1eed d\u1ee5ng Digital Signature \u0111\u1ec3 x\u00e1c nh\u1eadn.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; font-size: 14pt;\">R\u1ea5t kh\u00f3 \u0111\u1ec3 ch\u1ed1i b\u1ecf tr\u00e1ch nhi\u1ec7m hay ph\u1ee7 nh\u1eadn v\u00ec ch\u1eef k\u00fd s\u1ed1 \u0111\u01b0\u1ee3c t\u1ea1o ra s\u1ebd ghi l\u1ea1i tr\u00ean h\u1ec7 th\u1ed1ng. <\/span><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ung_dung_Digital_Signature_trong_nhung_truong_hop_nao\"><\/span>\u1ee8ng d\u1ee5ng Digital Signature trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p n\u00e0o?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><span style=\"font-weight: 400; font-size: 14pt;\">Hi\u1ec7n nay, ch\u1eef k\u00fd s\u1ed5 \u0111\u01b0\u1ee3c ph\u1ed5 bi\u1ebfn trong:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; font-size: 14pt;\">T\u0103ng c\u01b0\u1eddng \u0111\u1ed9 b\u1ea3o m\u1eadt c\u1ee7a h\u1ec7 th\u1ed1ng th\u00f4ng tin truy\u1ec1n th\u00f4ng, an ninh m\u1ea1ng<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; font-size: 14pt;\">S\u1eed d\u1ee5ng trong ki\u1ec3m so\u00e1t ho\u1ea1t \u0111\u1ed9ng t\u00e0i ch\u00ednh, ki\u1ec3m to\u00e1n t\u1ed5 ch\u1ee9c, doanh nghi\u1ec7p<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; font-size: 14pt;\">\u1ee8ng d\u1ee5ng ph\u00e1p l\u00fd, t\u00e0i li\u1ec7u ch\u00ednh ph\u1ee7, h\u1ee3p \u0111\u1ed3ng kinh doanh\u2026<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; font-size: 14pt;\">Ch\u1ed1ng gian l\u1eadn trong y t\u1ebf, h\u1ed3 s\u01a1 b\u1ec7nh \u00e1n, \u0111\u01a1n thu\u1ed1c\u2026<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; font-size: 14pt;\">Blockchain: kh\u1eb3ng \u0111\u1ecbnh t\u00ednh s\u1edf h\u1eefu h\u1ee3p ph\u00e1p c\u1ee7a ch\u1ee7 s\u1edf h\u1eefu ti\u1ec1n \u0111i\u1ec7n t\u1eed, t\u1eeb \u0111\u00f3 ki\u1ec3m so\u00e1t giao d\u1ecbch minh b\u1ea1ch, b\u1ea3o v\u1ec7 ng\u01b0\u1eddi d\u00f9ng kh\u1ecfi t\u1ea5n c\u00f4ng c\u1ee7a tin t\u1eb7c, ph\u00f2ng tr\u00e1nh th\u1ea5t tho\u00e1t t\u00e0i s\u1ea3n.&nbsp;<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400; font-size: 14pt;\"><strong>L\u01b0u \u00fd:<\/strong> Ch\u1eef k\u00fd s\u1ed1 l\u00e0 ch\u1eef k\u00fd \u0111i\u1ec7n t\u1eed, v\u1edbi ph\u01b0\u01a1ng th\u1ee9c x\u00e1c th\u1ef1c b\u1eb1ng m\u00e3 ho\u00e1 h\u00e0m b\u0103m v\u00e0 m\u1eadt m\u00e3 kh\u00f3a c\u00f4ng khai. V\u00ec th\u1ebf, m\u1ecdi ch\u1eef k\u00fd s\u1ed1 \u0111\u1ec1u l\u00e0 ch\u1eef k\u00fd \u0111i\u1ec7n t\u1eed; nh\u01b0ng kh\u00f4ng ph\u1ea3i ch\u1eef k\u00fd \u0111i\u1ec7n t\u1eed n\u00e0o c\u0169ng l\u00e0 ch\u1eef k\u00fd s\u1ed1. <\/span><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><img decoding=\"async\" src=\"https:\/\/www.fiahub.com\/blog\/wp-content\/uploads\/2021\/05\/ch\u1eef-k\u00fd-s\u1ed1-3-1024x756.png\" alt=\"Digital Signature, Ch\u1eef k\u00fd s\u1ed1, H\u00e0m b\u0103m, m\u1eadt m\u00e3 kho\u00e1 c\u00f4ng khai PKC\" class=\"wp-image-8577\" width=\"900\" height=\"600\"\/><figcaption><span style=\"color:#444444\" class=\"tadv-color\">Ch\u1eef k\u00fd s\u1ed1 \u1ee9ng d\u1ee5ng trong b\u1ea3o m\u1eadt h\u1ec7 th\u1ed1ng th\u00f4ng tin v\u00e0 x\u00e1c th\u1ef1c t\u00e0i kho\u1ea3n trong Blockchain<\/span><\/figcaption><\/figure><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Mot_vai_diem_han_che_cua_chu_ky_so_Digital_Signature\"><\/span>M\u1ed9t v\u00e0i \u0111i\u1ec3m h\u1ea1n ch\u1ebf c\u1ee7a ch\u1eef k\u00fd s\u1ed1 Digital Signature<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; font-size: 14pt;\">Ph\u1ee5 thu\u1ed9c v\u00e0o ch\u1ea5t l\u01b0\u1ee3ng c\u00e1c thu\u1eadt to\u00e1n s\u1eed d\u1ee5ng; bao g\u1ed3m c\u00e1c h\u1ec7 th\u1ed1ng m\u1eadt m\u00e3 v\u00e0 h\u00e0m b\u0103m.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; font-size: 14pt;\">N\u1ebfu vi\u1ec7c tri\u1ec3n khai kh\u00f4ng t\u1ed1t, m\u1eb7c d\u00f9 c\u00e1c thu\u1eadt to\u00e1n t\u1ed1t, ch\u1eef k\u00fd s\u1ed1 v\u1eabn c\u00f3 th\u1ec3 x\u1ea3y ra sai s\u00f3t.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; font-size: 14pt;\">Khi tin t\u1eb7c x\u00e2m ph\u1ea1m v\u00e0 c\u00e1c kh\u00f3a ri\u00eang b\u1ecb r\u00f2 r\u1ec9, m\u1ecdi t\u00ednh n\u0103ng c\u1ee7a ch\u1eef k\u00fd s\u1ed1 v\u1ec1 \u0111\u1ed9 x\u00e1c th\u1ef1c, ch\u1ed1ng tho\u00e1i th\u00e1c s\u1ebd kh\u00f4ng c\u00f2n hi\u1ec7u l\u1ef1c. T\u00e0i s\u1ea3n c\u1ee7a ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 b\u1ecb \u0111\u00e1nh c\u1eafp.<\/span><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><span style=\"font-weight: 400; font-size: 14pt;\">Tr\u00ean \u0111\u00e2y l\u00e0 nh\u1eefng chia s\u1ebb v\u1ec1 Digital Signature (ch\u1eef k\u00fd s\u1ed1) &#8211; m\u1ed9t y\u1ebfu t\u1ed1 \u0111\u1ea7u v\u00e0o quan tr\u1ecdng c\u1ee7a h\u1ec7 th\u1ed1ng blockchain. Khi ch\u1eef k\u00fd s\u1ed1 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u00fang c\u00e1ch, n\u00f3 l\u00e0 c\u00f4ng c\u1ee5 quan tr\u1ecdng t\u1ea1o \u0111i\u1ec1u ki\u1ec7n x\u00e1c th\u1ef1c, gi\u1eef an to\u00e0n v\u00e0 b\u1ea3o m\u1eadt cho m\u1ecdi d\u1eef li\u1ec7u, t\u00e0i s\u1ea3n k\u1ef9 thu\u1eadt s\u1ed1.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt;\">Ch\u1eef k\u00fd s\u1ed1 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong vi\u1ec7c chuy\u1ec3n ti\u1ec1n s\u1ed1 hay \u1ee7y quy\u1ec1n th\u1ef1c hi\u1ec7n giao d\u1ecbch. \u0110\u00e2y l\u00e0 chi\u1ebfc ch\u00eca kh\u00f3a quan tr\u1ecdng \u0111\u1ec3 ch\u1ee7 s\u1edf h\u1eefu v\u00ed hay ti\u1ec1n s\u1ed1 \u0111\u01b0\u1ee3c ph\u00e9p s\u1eed d\u1ee5ng t\u00e0i s\u1ea3n c\u1ee7a m\u00ecnh.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt;\">Hi\u1ec3u \u0111\u01b0\u1ee3c t\u1ea7m quan tr\u1ecdng c\u1ee7a ch\u1eef k\u00fd s\u1ed1, c\u00e1c trader s\u1ebd d\u1ec5 d\u00e0ng h\u01a1n trong vi\u1ec7c th\u1ef1c hi\u1ec7n nh\u1eefng thao t\u00e1c c\u1ee7a m\u00ecnh trong giao d\u1ecbch. <a href=\"https:\/\/www.fiahub.com\">Fiahub<\/a> mong r\u1eb1ng b\u00e0i vi\u1ebft \u0111\u00e3 \u0111\u01b0a ra nh\u1eefng th\u00f4ng tin h\u1eefu \u00edch cho c\u00e1c b\u1ea1n. \u0110\u1eebng qu\u00ean \u0111\u00f3n \u0111\u1ecdc nh\u1eefng b\u00e0i vi\u1ebft ti\u1ebfp theo tr\u00ean website c\u1ee7a ch\u00fang t\u00f4i. <a href=\"https:\/\/www.fiahub.com\">Fiahub<\/a> lu\u00f4n s\u1eb5n s\u00e0ng t\u01b0 v\u1ea5n m\u1ecdi v\u1ea5n \u0111\u1ec1 v\u1ec1 blockchain v\u00e0 th\u1ecb tr\u01b0\u1eddng crypto 24\/7.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ch\u1eef k\u00fd s\u1ed1 hay ch\u1eef k\u00fd \u0111i\u1ec7n t\u1eed tr\u1edf n\u00ean ng\u00e0y c\u00e0ng ph\u1ed5 bi\u1ebfn, \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng thay th\u1ebf cho ch\u1eef k\u00fd vi\u1ebft tay th\u00f4ng th\u01b0\u1eddng trong doanh nghi\u1ec7p, t\u1ed5 ch\u1ee9c v\u00e0 \u0111\u01b0\u1ee3c ph\u00e1p l\u00fd c\u00f4ng nh\u1eadn. B\u1ea3n ch\u1ea5t c\u1ee7a ch\u1eef k\u00fd s\u1ed1 l\u00e0 s\u1ef1 bi\u1ebfn \u0111\u1ed5i th\u00f4ng \u0111i\u1ec7p th\u00e0nh d\u1eef li\u1ec7u, th\u00f4ng qua h\u1ec7<\/p>\n","protected":false},"author":23,"featured_media":8578,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"elementor_theme","format":"standard","meta":{"footnotes":""},"categories":[21850],"tags":[17146,17148,17149,17150],"class_list":{"0":"post-8574","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-tu-dien-crypto","8":"tag-digital-signature","9":"tag-ham-bam","10":"tag-mat-ma-khoa-cong-khai","11":"tag-pkc"},"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\u00ecm hi\u1ec3u v\u1ec1 Digital Signature (Ch\u1eef k\u00fd s\u1ed1) v\u00e0 \u1ee9ng d\u1ee5ng - Fiahub<\/title>\n<meta name=\"description\" content=\"Digital Signature (Ch\u1eef k\u00fd s\u1ed1) kh\u00f4ng c\u00f2n xa l\u1ea1 trong c\u00f4ng ngh\u1ec7 blockchain. V\u1eady nh\u01b0ng b\u1ea1n \u0111\u00e3 th\u1ef1c s\u1ef1 hi\u1ec3u r\u00f5 v\u1ec1 n\u00f3?\" \/>\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\/tim-hieu-ve-digital-signature-chu-ky-so-va-ung-dung-cua-no\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"T\u00ecm hi\u1ec3u v\u1ec1 Digital Signature (Ch\u1eef k\u00fd s\u1ed1) v\u00e0 \u1ee9ng d\u1ee5ng\" \/>\n<meta property=\"og:description\" content=\"Digital Signature (Ch\u1eef k\u00fd s\u1ed1) kh\u00f4ng c\u00f2n xa l\u1ea1 trong c\u00f4ng ngh\u1ec7 blockchain. 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