{"id":27292,"date":"2023-12-07T03:46:09","date_gmt":"2023-12-07T03:46:09","guid":{"rendered":"https:\/\/masterskills.org\/blog\/bam-muc-tieu-target-hash-trong-cong-nghe-chuoi-khoi-la-gi-noi-dung-ve-bam-muc-tieu.html"},"modified":"2023-12-22T14:55:01","modified_gmt":"2023-12-22T07:55:01","slug":"bam-muc-tieu-target-hash-trong-cong-nghe-chuoi-khoi-la-gi-noi-dung-ve-bam-muc-tieu","status":"publish","type":"post","link":"https:\/\/masterskills.org\/blog\/bam-muc-tieu-target-hash-trong-cong-nghe-chuoi-khoi-la-gi-noi-dung-ve-bam-muc-tieu.html","title":{"rendered":"B\u0103m m\u1ee5c ti\u00eau (Target Hash) trong c\u00f4ng ngh\u1ec7 chu\u1ed7i kh\u1ed1i l\u00e0 g\u00ec? N\u1ed9i dung v\u1ec1 B\u0103m m\u1ee5c ti\u00eau"},"content":{"rendered":"<div class=\"vnbcbc-body vceditor-content wi-active\" data-role=\"content\">\n<figure class=\"VCSortableInPreviewMode\" type=\"Photo\" style=\"\">\n<div><\/div><figcaption class=\"PhotoCMS_Caption\">\n<p data-placeholder=\"[Nh\u1eadp ch\u00fa th\u00edch \u1ea3nh]\" class=\"\">H\u00ecnh minh h\u1ecda (Ngu\u1ed3n: tek4.vn)<\/p>\n<\/figcaption><\/figure>\n<h2><font style=\"line-height: 22px; font-size: 22px;\" color=\"#3d85c6\">B\u0103m m\u1ee5c ti\u00eau (Target Hash)<\/font><\/h2>\n<p><b>Kh\u00e1i ni\u1ec7m<\/b><\/p>\n<p><b>B\u0103m m\u1ee5c ti\u00eau<\/b> trong ti\u1ebfng Anh l\u00e0 <b>Target Hash.<\/b><\/p>\n<p><i>B\u0103m m\u1ee5c ti\u00eau<\/i> l\u00e0 m\u1ed9t s\u1ed1 m\u00e0 ti\u00eau \u0111\u1ec1 kh\u1ed1i b\u0103m (hashed block header) ph\u1ea3i nh\u1ecf h\u01a1n ho\u1eb7c b\u1eb1ng \u0111\u1ec3 m\u1ed9t kh\u1ed1i m\u1edbi \u0111\u01b0\u1ee3c trao. <i>B\u0103m m\u1ee5c ti\u00eau<\/i> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 kh\u00f3 c\u1ee7a \u0111\u1ea7u v\u00e0o v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00e1c kh\u1ed1i \u0111\u01b0\u1ee3c x\u1eed l\u00fd hi\u1ec7u qu\u1ea3.<\/p>\n<h3><b><font style=\"line-height: 22px; font-size: 22px;\" color=\"#3d85c6\">N\u1ed9i dung v\u1ec1 B\u0103m m\u1ee5c ti\u00eau<\/font><\/b><\/h3>\n<p>C\u00e1c \u0111\u1ed3ng ti\u1ec1n m\u00e3 h\u00f3a d\u1ef1a tr\u00ean vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c <span>chu\u1ed7i kh\u1ed1i<\/span> c\u00f3 ch\u1ee9a l\u1ecbch s\u1eed giao d\u1ecbch v\u00e0 &#8220;\u0111\u01b0\u1ee3c b\u0103m&#8221; ho\u1eb7c \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a th\u00e0nh m\u1ed9t chu\u1ed7i c\u00e1c s\u1ed1 v\u00e0 ch\u1eef c\u00e1i. Vi\u1ec7c b\u0103m bao g\u1ed3m l\u1ea5y m\u1ed9t chu\u1ed7i d\u1eef li\u1ec7u c\u00f3 \u0111\u1ed9 d\u00e0i b\u1ea5t k\u00ec v\u00e0 ch\u1ea1y n\u00f3 th\u00f4ng qua thu\u1eadt to\u00e1n \u0111\u1ec3 t\u1ea1o ra m\u1ed9t \u0111\u1ea7u ra c\u00f3 \u0111\u1ed9 d\u00e0i c\u1ed1 \u0111\u1ecbnh. \u0110\u1ea7u ra s\u1ebd lu\u00f4n c\u00f3 c\u00f9ng \u0111\u1ed9 d\u00e0i, b\u1ea5t k\u1ec3 \u0111\u1ea7u v\u00e0o l\u1edbn hay nh\u1ecf. B\u1ea5t k\u00ec ai giao d\u1ecbch v\u1edbi <span>chu\u1ed7i kh\u1ed1i<\/span> \u0111\u1ec1u ph\u1ea3i nh\u1edb h\u00e0m b\u0103m ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 \u0111\u1ea7u v\u00e0o. M\u1ed7i kh\u1ed1i s\u1ebd ch\u1ee9a h\u00e0m b\u0103m c\u1ee7a ti\u00eau \u0111\u1ec1 kh\u1ed1i tr\u01b0\u1edbc \u0111\u00f3.<\/p>\n<p>Gi\u1ea3i m\u00e3 v\u00e0 m\u00e3 h\u00f3a <span>chu\u1ed7i kh\u1ed1i<\/span> \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0\u00a0khai th\u00e1c. Khai th\u00e1c li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng m\u00e1y t\u00ednh \u0111\u1ec3 ch\u1ea1y c\u00e1c thu\u1eadt to\u00e1n b\u0103m \u0111\u1ec3 x\u1eed l\u00ed kh\u1ed1i g\u1ea7n nh\u1ea5t, v\u1edbi th\u00f4ng tin c\u1ea7n thi\u1ebft trong khai th\u00e1c \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong ti\u00eau \u0111\u1ec1 c\u1ee7a kh\u1ed1i. M\u1ea1ng <span>ti\u1ec1n m\u00e3 h\u00f3a<\/span> \u0111\u1eb7t m\u1ed9t gi\u00e1 tr\u1ecb \u0111\u00edch cho h\u00e0m b\u0103m n\u00e0y (\u0111\u00f3 g\u1ecdi l\u00e0<i> b\u0103m m\u1ee5c ti\u00eau<\/i>) v\u00e0 c\u00e1c th\u1ee3 \u0111\u00e0o c\u1ed1 g\u1eafng x\u00e1c \u0111\u1ecbnh gi\u00e1 tr\u1ecb n\u00e0y l\u00e0 g\u00ec b\u1eb1ng c\u00e1ch ki\u1ec3m tra t\u1ea5t c\u1ea3 c\u00e1c gi\u00e1 tr\u1ecb c\u00f3 kh\u1ea3 n\u0103ng.<\/p>\n<p>Ti\u00eau \u0111\u1ec1 kh\u1ed1i (Block Header) ch\u1ee9a s\u1ed1 phi\u00ean b\u1ea3n kh\u1ed1i, d\u1ea5u th\u1eddi gian, h\u00e0m b\u0103m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong kh\u1ed1i tr\u01b0\u1edbc \u0111\u00f3, h\u00e0m b\u0103m c\u1ee7a\u00a0Merkle Root, s\u1ed1 ch\u1ec9 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng m\u1ed9t l\u1ea7n (Nonce) v\u00e0<i> b\u0103m m\u1ee5c ti\u00eau. <\/i>Kh\u1ed1i \u0111\u01b0\u1ee3c t\u1ea1o b\u1eb1ng c\u00e1ch l\u1ea5y h\u00e0m b\u0103m c\u1ee7a n\u1ed9i dung kh\u1ed1i, th\u00eam m\u1ed9t chu\u1ed7i s\u1ed1 ng\u1eabu nhi\u00ean (nonce)\u00a0v\u00e0 b\u0103m l\u1ea1i kh\u1ed1i \u0111\u00f3.<\/p>\n<p>N\u1ebfu h\u00e0m b\u0103m \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u c\u1ee7a m\u1ee5c ti\u00eau, th\u00ec kh\u1ed1i \u0111\u01b0\u1ee3c th\u00eam v\u00e0o chu\u1ed7i kh\u1ed1i. Tr\u1ea3i qua c\u00e1c gi\u1ea3i ph\u00e1p \u0111\u1ec3 d\u1ef1 \u0111o\u00e1n s\u1ed1 ch\u1ec9 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng m\u1ed9t l\u1ea7n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 proof of work (POW) v\u00e0 ng\u01b0\u1eddi khai th\u00e1c c\u00f3 th\u1ec3 t\u00ecm th\u1ea5y gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c trao kh\u1ed1i v\u00e0 tr\u1ea3 b\u1eb1ng ti\u1ec1n m\u00e3 h\u00f3a.<\/p>\n<p>H\u00e0m <i>b\u0103m m\u1ee5c ti\u00eau<\/i> cho Bitcoin l\u00e0 m\u1ed9t s\u1ed1\u00a0256 bit\u00a0v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong ti\u00eau \u0111\u1ec1 kh\u1ed1i. Vi\u1ec7c khai th\u00e1c m\u1ed9t kh\u1ed1i y\u00eau c\u1ea7u th\u1ee3 \u0111\u00e0o t\u1ea1o ra m\u1ed9t gi\u00e1 tr\u1ecb (nonce), sau khi \u0111\u01b0\u1ee3c b\u0103m, nh\u1ecf h\u01a1n ho\u1eb7c b\u1eb1ng m\u1ed9t kh\u1ed1i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong kh\u1ed1i g\u1ea7n nh\u1ea5t \u0111\u01b0\u1ee3c m\u1ea1ng Bitcoin ch\u1ea5p nh\u1eadn.\u00a0<\/p>\n<p>Con s\u1ed1 n\u00e0y n\u1eb1m trong kho\u1ea3ng 0 (l\u1ef1a ch\u1ecdn nh\u1ecf nh\u1ea5t) \u0111\u1ebfn 256 bit (l\u1ef1a ch\u1ecdn l\u1edbn nh\u1ea5t), nh\u01b0ng kh\u00f4ng ch\u1eafc l\u00e0 s\u1ed1 l\u01b0\u1ee3ng t\u1ed1i \u0111a. V\u00ec h\u00e0m<i> b\u0103m m\u1ee5c ti\u00eau<\/i> c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t s\u1ed1 l\u01b0\u1ee3ng l\u1edbn, ng\u01b0\u1eddi khai th\u00e1c c\u00f3 th\u1ec3 ph\u1ea3i ki\u1ec3m tra m\u1ed9t s\u1ed1 l\u01b0\u1ee3ng l\u1edbn c\u00e1c gi\u00e1 tr\u1ecb tr\u01b0\u1edbc khi th\u00e0nh c\u00f4ng. Th\u1ee3 \u0111\u00e0o kh\u00f4ng th\u00e0nh c\u00f4ng s\u1ebd ph\u1ea3i ch\u1edd kh\u1ed1i ti\u1ebfp theo, \u0111i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn vi\u1ec7c c\u00e1c th\u1ee3 \u0111\u00e0o th\u00edch t\u00ecm gi\u1ea3i ph\u00e1p b\u0103m \u0111\u1ec3 chi\u1ebfn th\u1eafng trong cu\u1ed9c \u0111ua.<\/p>\n<p><b>B\u0103m m\u1ee5c ti\u00eau<\/b> \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ecbnh k\u00ec. C\u00e1c h\u00e0m b\u0103m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o m\u1ee5c ti\u00eau m\u1edbi c\u00f3 c\u00e1c thu\u1ed9c t\u00ednh c\u1ee5 th\u1ec3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 l\u00e0m cho <span>chu\u1ed7i kh\u1ed1i<\/span>\u00a0(v\u00e0 ti\u1ec1n m\u00e3 h\u00f3a) an to\u00e0n. N\u00f3 mang t\u00ednh quy\u1ebft \u0111\u1ecbnh, s\u1ebd t\u1ea1o ra c\u00f9ng m\u1ed9t k\u1ebft qu\u1ea3 m\u1ed7i l\u1ea7n s\u1eed d\u1ee5ng c\u00f9ng m\u1ed9t \u0111\u1ea7u v\u00e0o. N\u00f3 \u0111\u1ee7 nhanh \u0111\u1ec3 kh\u00f4ng m\u1ea5t qu\u00e1 nhi\u1ec1u th\u1eddi gian tr\u1ea3 v\u1ec1 h\u00e0m b\u0103m cho \u0111\u1ea7u v\u00e0o. N\u00f3 c\u0169ng l\u00e0m cho vi\u1ec7c x\u00e1c \u0111\u1ecbnh \u0111\u1ea7u v\u00e0o r\u1ea5t kh\u00f3 kh\u0103n, \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi s\u1ed1 l\u01b0\u1ee3ng l\u1edbn v\u00e0 th\u1ef1c hi\u1ec7n c\u00e1c thay \u0111\u1ed5i nh\u1ecf \u0111\u1ed1i v\u1edbi k\u1ebft qu\u1ea3 \u0111\u1ea7u v\u00e0o trong m\u1ed9t \u0111\u1ea7u ra c\u1ee7a h\u00e0m b\u0103m r\u1ea5t kh\u00e1c nhau.<\/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                            B\u0103m m\u1ee5c ti\u00eau (ti\u1ebfng Anh: Target Hash) l\u00e0 m\u1ed9t s\u1ed1 m\u00e0 ti\u00eau \u0111\u1ec1 kh\u1ed1i b\u0103m (hashed block header) ph\u1ea3i nh\u1ecf h\u01a1n ho\u1eb7c b\u1eb1ng \u0111\u1ec3 m\u1ed9t kh\u1ed1i m\u1edbi \u0111\u01b0\u1ee3c trao.\n                        <\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[415],"tags":[],"_links":{"self":[{"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/posts\/27292"}],"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=27292"}],"version-history":[{"count":0,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/posts\/27292\/revisions"}],"wp:attachment":[{"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/media?parent=27292"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/categories?post=27292"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/tags?post=27292"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}