{"id":31312,"date":"2023-12-07T10:31:38","date_gmt":"2023-12-07T10:31:38","guid":{"rendered":"https:\/\/masterskills.org\/blog\/chi-tieu-hai-lan-double-spending-la-gi-nhuoc-diem-cua-chuoi-khoi-ve-viec-chi-tieu-hai-lan.html"},"modified":"2023-12-23T08:01:20","modified_gmt":"2023-12-23T01:01:20","slug":"chi-tieu-hai-lan-double-spending-la-gi-nhuoc-diem-cua-chuoi-khoi-ve-viec-chi-tieu-hai-lan","status":"publish","type":"post","link":"https:\/\/masterskills.org\/blog\/chi-tieu-hai-lan-double-spending-la-gi-nhuoc-diem-cua-chuoi-khoi-ve-viec-chi-tieu-hai-lan.html","title":{"rendered":"Chi ti\u00eau hai l\u1ea7n (Double-Spending) l\u00e0 g\u00ec? Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a chu\u1ed7i kh\u1ed1i v\u1ec1 vi\u1ec7c chi ti\u00eau hai l\u1ea7n"},"content":{"rendered":"<div class=\"vnbcbc-body vceditor-content wi-active\" data-role=\"content\">\n<div class=\"VCSortableInPreviewMode\" type=\"Photo\" style=\"\">\n<div><\/div>\n<div class=\"PhotoCMS_Caption\">\n<p>H\u00ecnh minh h\u1ecda (Ngu\u1ed3n: Gadget Gram)<\/p>\n<\/div>\n<\/div>\n<h2><font style=\"line-height: 22px; font-size: 22px;\" color=\"#3d85c6\">Chi ti\u00eau hai l\u1ea7n (Double-Spending)<\/font><\/h2>\n<p><b>Kh\u00e1i ni\u1ec7m<\/b><\/p>\n<p><b>Chi ti\u00eau hai l\u1ea7n<\/b> trong ti\u1ebfng Anh l\u00e0 Double-Spending.<\/p>\n<p><i>Chi ti\u00eau hai l\u1ea7n<\/i> l\u00e0 r\u1ee7i ro khi m\u1ed9t lo\u1ea1i ti\u1ec1n k\u0129 thu\u1eadt s\u1ed1 \u0111\u01b0\u1ee3c ti\u00eau trong hai l\u01b0\u1ee3t. \u0110\u00e2y l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 ti\u1ec1m n\u0103ng ch\u1ec9 x\u1ea3y ra \u0111\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i ti\u1ec1n k\u0129 thu\u1eadt s\u1ed1 v\u00ec th\u00f4ng tin k\u0129 thu\u1eadt s\u1ed1 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00e1i l\u1eadp t\u01b0\u01a1ng \u0111\u1ed1i d\u1ec5 d\u00e0ng b\u1edfi nh\u1eefng c\u00e1 nh\u00e2n c\u00f3 hi\u1ec3u bi\u1ebft v\u1ec1 m\u1ea1ng\u00a0chu\u1ed7i kh\u1ed1i\u00a0v\u00e0 c\u00f3 n\u0103ng l\u1ef1c t\u00ednh to\u00e1n c\u1ea7n thi\u1ebft \u0111\u1ec3 thao t\u00fang n\u00f3.<\/p>\n<p>C\u00e1c lo\u1ea1i ti\u1ec1n h\u1eefu h\u00ecnh kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi v\u1ea5n \u0111\u1ec1 n\u00e0y v\u00ec ch\u00fang kh\u00f3 b\u1ecb t\u00e1i l\u1eadp d\u1ec5 d\u00e0ng v\u00e0 c\u00e1c b\u00ean li\u00ean quan \u0111\u1ebfn giao d\u1ecbch c\u00f3 th\u1ec3 x\u00e1c minh ngay t\u00ednh x\u00e1c th\u1ef1c v\u00e0 quy\u1ec1n s\u1edf h\u1eefu trong qu\u00e1 kh\u1ee9 \u0111\u1ed1i v\u1edbi lo\u1ea1i ti\u1ec1n n\u00e0y. T\u1ea5t nhi\u00ean vi\u1ec7c x\u00e1c th\u1ef1c n\u00e0y kh\u00f4ng bao g\u1ed3m c\u00e1c v\u1ea5n \u0111\u1ec1 li\u00ean quan \u0111\u1ebfn giao d\u1ecbch ti\u1ec1n m\u1eb7t.<\/p>\n<p>\u0110\u00e2y l\u00e0 m\u1ed1i quan t\u00e2m h\u00e0ng \u0111\u1ea7u v\u1ec1 bitcoin, lo\u1ea1i ti\u1ec1n k\u0129 thu\u1eadt s\u1ed1 ph\u1ed5 bi\u1ebfn nh\u1ea5t ho\u1eb7c &#8220;ti\u1ec1n m\u00e3 h\u00f3a&#8221;, v\u00ec \u0111\u00e2y l\u00e0 lo\u1ea1i ti\u1ec1n phi t\u1eadp trung kh\u00f4ng c\u00f3 c\u01a1 quan trung \u01b0\u01a1ng \u0111\u1ec3 x\u00e1c minh r\u1eb1ng n\u00f3 ch\u1ec9 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng m\u1ed9t l\u1ea7n. Tuy nhi\u00ean, bitcoin c\u00f3 m\u1ed9t c\u01a1 ch\u1ebf d\u1ef1a tr\u00ean nh\u1eadt k\u00ed giao d\u1ecbch, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 chu\u1ed7i kh\u1ed1i, \u0111\u1ec3 x\u00e1c minh t\u00ednh x\u00e1c th\u1ef1c c\u1ee7a t\u1eebng giao d\u1ecbch v\u00e0 ng\u0103n ch\u1eb7n vi\u1ec7c t\u00ednh hai l\u1ea7n.<\/p>\n<h3><font style=\"line-height: 22px; font-size: 22px;\" color=\"#3d85c6\">Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a chu\u1ed7i kh\u1ed1i v\u1ec1 vi\u1ec7c chi ti\u00eau hai l\u1ea7n<\/font><\/h3>\n<p>C\u00e1c hacker \u0111\u00e3 c\u1ed1 g\u1eafng kh\u1eafc ph\u1ee5c h\u1ec7 th\u1ed1ng x\u00e1c minh Bitcoin b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng th\u1ee9c nh\u01b0 \u0111i\u1ec7n to\u00e1n h\u00f3a c\u01a1 ch\u1ebf b\u1ea3o m\u1eadt chu\u1ed7i kh\u1ed1i ho\u1eb7c s\u1eed d\u1ee5ng k\u0129 thu\u1eadt <i>chi ti\u00eau hai l\u1ea7n<\/i> li\u00ean quan \u0111\u1ebfn vi\u1ec7c g\u1eedi nh\u1eadt k\u00ed giao d\u1ecbch gian l\u1eadn cho ng\u01b0\u1eddi b\u00e1n v\u00e0 m\u1ed9t ng\u01b0\u1eddi kh\u00e1c cho ph\u1ea7n c\u00f2n l\u1ea1i c\u1ee7a m\u1ea1ng Bitcoin.<\/p>\n<p>Nh\u1eefng vi\u1ec7c n\u00e0y ch\u1ec9 c\u00f3 th\u00e0nh c\u00f4ng h\u1ea1n ch\u1ebf. Tr\u00ean th\u1ef1c t\u1ebf, h\u1ea7u h\u1ebft c\u00e1c v\u1ee5 tr\u1ed9m Bitcoin cho \u0111\u1ebfn nay kh\u00f4ng li\u00ean quan \u0111\u1ebfn vi\u1ec7c t\u00ednh hai l\u1ea7n m\u00e0 l\u00e0 do ng\u01b0\u1eddi d\u00f9ng l\u01b0u tr\u1eef bitcoin khi kh\u00f4ng c\u00f3 bi\u1ec7n ph\u00e1p an to\u00e0n \u0111\u1ea7y \u0111\u1ee7.<\/p>\n<p>R\u1ee7i ro l\u1edbn nh\u1ea5t \u0111\u1ed1i v\u1edbi<b> chi ti\u00eau hai l\u1ea7n<\/b> x\u1ea3y ra d\u01b0\u1edbi\u00a0h\u00ecnh th\u1ee9c t\u1ea5n c\u00f4ng 51%, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 x\u1ea3y ra n\u1ebfu ng\u01b0\u1eddi d\u00f9ng ki\u1ec3m so\u00e1t h\u01a1n 50% n\u0103ng l\u1ef1c t\u00ednh to\u00e1n duy tr\u00ec s\u1ed5 c\u00e1i ph\u00e2n b\u1ed5 c\u1ee7a ti\u1ec1n m\u00e3 h\u00f3a. N\u1ebfu ng\u01b0\u1eddi d\u00f9ng n\u00e0y ki\u1ec3m so\u00e1t chu\u1ed7i kh\u1ed1i, h\u1ecd s\u1ebd c\u00f3 th\u1ec3 x\u1eed l\u00ed chuy\u1ec3n bitcoin sang v\u00ed c\u1ee7a h\u1ecd nhi\u1ec1u l\u1ea7n b\u1eb1ng c\u00e1ch \u0111\u1ea3o ng\u01b0\u1ee3c s\u1ed5 c\u00e1i chu\u1ed7i kh\u1ed1i nh\u01b0 th\u1ec3 c\u00e1c giao d\u1ecbch ban \u0111\u1ea7u ch\u01b0a bao gi\u1edd x\u1ea3y ra.<\/p>\n<p><i>(T\u00e0i li\u1ec7u tham kh\u1ea3o: investopedia.com)<\/i><\/p>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<div class=\"vnbcbc-sapo\" data-role=\"sapo\">\n                            Chi ti\u00eau hai l\u1ea7n (ti\u1ebfng Anh: Double-Spending) l\u00e0 r\u1ee7i ro khi m\u1ed9t lo\u1ea1i ti\u1ec1n k\u0129 thu\u1eadt s\u1ed1 \u0111\u01b0\u1ee3c ti\u00eau trong hai l\u01b0\u1ee3t.\n                        <\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[417],"tags":[],"_links":{"self":[{"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/posts\/31312"}],"collection":[{"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/comments?post=31312"}],"version-history":[{"count":0,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/posts\/31312\/revisions"}],"wp:attachment":[{"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/media?parent=31312"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/categories?post=31312"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/tags?post=31312"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}