{"id":5430,"date":"2020-08-10T11:16:32","date_gmt":"2020-08-10T04:16:32","guid":{"rendered":"https:\/\/news.bitcoinvn.io\/?p=5430"},"modified":"2020-08-10T11:16:32","modified_gmt":"2020-08-10T04:16:32","slug":"khoa-cong-khai-public-key-la-gi","status":"publish","type":"post","link":"https:\/\/bitcoinvn.io\/news\/vi\/khoa-cong-khai-public-key-la-gi\/","title":{"rendered":"Kho\u00e1 c\u00f4ng khai (Public Key) l\u00e0 g\u00ec?"},"content":{"rendered":"

B\u00e0i vi\u1ebft s\u1ebd gi\u1edbi thi\u1ec7u \u0111\u1ed9c gi\u1ea3 kho\u00e1 c\u00f4ng khai l\u00e0 g\u00ec. C\u00e1ch kho\u00e1 c\u00f4ng khai (Public Key) \u0111\u01b0\u1ee3c t\u1ea1o ra nh\u01b0 th\u1ebf n\u00e0o v\u00e0 c\u00e1ch s\u1eed d\u1ee5ng ch\u00fang. \u0110\u00e2y l\u00e0 nh\u1eefng th\u00f4ng tin c\u1ea7n thi\u1ebft gi\u00fap b\u1ea1n \u0111\u1ea7u t\u01b0 Bitcoin an to\u00e0n.
\n<\/p>\n

\u0110\u1ecbnh ngh\u0129a: Kho\u00e1 c\u00f4ng khai l\u00e0 g\u00ec?<\/strong><\/h2>\n

M\u1ed9t kho\u00e1 c\u00f4ng khai (Public Key) l\u00e0 m\u1ed9t \u0111o\u1ea1n m\u00e3 \u0111\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 nh\u1eadn ti\u1ec1n \u0111i\u1ec7n t\u1eed v\u00e0o t\u00e0i kho\u1ea3n c\u1ee7a m\u00ecnh. Kho\u00e1 c\u00f4ng khai k\u1ebft h\u1ee3p v\u1edbi kho\u00e1 ri\u00eang t\u01b0 (Private Key) l\u00e0 nh\u1eefng c\u00f4ng c\u1ee5 quan tr\u1ecdng c\u1ea7n c\u00f3 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n cho ti\u1ec1n m\u00e3 ho\u00e1.<\/p>\n

Kho\u00e1 c\u00f4ng khai \u0111\u01b0\u1ee3c t\u1ea1o ra nh\u01b0 th\u1ebf n\u00e0o?<\/strong><\/h2>\n

Khi g\u1eedi nh\u1eadn Bitcoin<\/a> l\u1ea7n \u0111\u1ea7u ti\u00ean, m\u1ed9t c\u1eb7p kho\u00e1 c\u00f4ng khai v\u00e0 ri\u00eang t\u01b0 s\u1ebd \u0111\u01b0\u1ee3c kh\u1edfi t\u1ea1o. M\u1ed7i kho\u00e1 n\u00e0y l\u00e0 m\u1ed9t chu\u1ed7i c\u00e1c k\u00ed t\u1ef1 d\u00e0i lo\u1eb1ng ngo\u1eb1ng. N\u00f3 gi\u00fap gi\u1eef an to\u00e0n cho c\u00e1c \u0111\u1ed3ng ti\u1ec1n s\u1ed1 c\u1ee7a m\u00ecnh. Kho\u00e1 ri\u00eang t\u01b0 th\u00ec ch\u1ec9 c\u00f3 ng\u01b0\u1eddi d\u00f9ng bi\u1ebft th\u00f4i v\u00e0 d\u00f9ng nh\u01b0 m\u1eadt kh\u1ea9u.
\nKho\u00e1 ri\u00eang t\u01b0 cho ph\u00e9p b\u1ea1n g\u1eedi, r\u00fat, chuy\u1ec3n ti\u1ec1n t\u1eeb t\u00e0i kho\u1ea3n c\u1ee7a m\u00ecnh. M\u1ed9t thu\u1eadt to\u00e1n ph\u1ee9c t\u1ea1p \u0111\u01b0\u1ee3c \u00e1p v\u00e0o kho\u00e1 ri\u00eang t\u01b0 \u0111\u1ec3 kh\u1edfi t\u1ea1o kho\u00e1 c\u00f4ng khai. V\u00e0 c\u1ea3 hai kho\u00e1 n\u00e0y \u0111\u01b0\u1ee3c l\u01b0u trong v\u00ed ti\u1ec1n s\u1ed1.<\/p>\n

Khi g\u1eedi y\u00eau c\u1ea7u m\u1ed9t n\u1ea1p\/r\u00fat ch\u1eb3ng h\u1ea1n, giao d\u1ecbch \u0111\u00f3 s\u1ebd \u0111\u01b0\u1ee3c \u0111\u01b0a l\u00ean tr\u00ean h\u1ec7 th\u1ed1ng n\u01a1i c\u00e1c node phi t\u1eadp trung x\u00e1c nh\u1eadn. Ti\u1ebfp \u0111\u00f3 giao d\u1ecbch \u0111\u01b0\u1ee3c k\u1ebft th\u00fac v\u00e0 l\u01b0u v\u00e0o tr\u00ean blockchain<\/a>. Tr\u01b0\u1edbc khi \u0111\u01b0\u1ee3c \u0111\u01b0a l\u00ean h\u1ec7 th\u1ed1ng th\u00ec giao d\u1ecbch \u0111\u00e3 \u0111\u01b0\u1ee3c k\u00ed x\u00e1c nh\u1eadn b\u1eb1ng kho\u00e1 ri\u00eang t\u01b0. Ch\u1eef k\u00ed d\u00f9ng \u0111\u1ec3 ch\u1ee9ng minh quy\u1ec1n s\u1edf h\u1eefu kho\u00e1 ri\u00eang t\u01b0. Kh\u00f4ng ai c\u00f3 th\u1ec3 bi\u1ebft chi ti\u1ebft kho\u00e1 ri\u00eang t\u01b0 \u0111\u00f3 ngo\u00e0i ch\u1ee7 s\u1edf h\u1eefu.<\/p>\n

V\u00ec kho\u00e1 c\u00f4ng khai \u0111\u01b0\u1ee3c t\u1ea1o ra t\u1eeb kho\u00e1 ri\u00eang t\u01b0, n\u00ean kho\u00e1 c\u00f4ng khai \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 ch\u1ee9ng minh l\u00e0 ch\u1eef k\u00ed s\u1ed1 \u0111\u00f3 \u0111\u1ebfn t\u1eeb kho\u00e1 ri\u00eang c\u1ee7a b\u1ea1n. Khi giao d\u1ecbch \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn l\u00e0 h\u1ee3p l\u1ec7, s\u1ed1 ti\u1ec1n m\u1edbi \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ebfn \u0111\u1ecba ch\u1ec9 c\u00f4ng khai c\u1ee7a ng\u01b0\u1eddi nh\u1eadn.<\/p>\n

\u0110\u1ecba ch\u1ec9 c\u00f4ng khai l\u00e0 m\u1ed9t phi\u00ean b\u1ea3n \u0111\u01b0\u1ee3c m\u00e3 ho\u00e1 c\u1ee7a kho\u00e1 c\u00f4ng khai. Kho\u00e1 c\u00f4ng khai th\u1ef1c ch\u1ea5t l\u00e0 m\u1ed9t chu\u1ed7i c\u00e1c con s\u1ed1 r\u1ea5t d\u00e0i. N\u00ean n\u00f3 \u0111\u01b0\u1ee3c n\u00e9n ng\u1eafn l\u1ea1i v\u00e0 t\u1ea1o ra \u0111\u1ecba ch\u1ec9 c\u00f4ng khai.<\/p>\n

C\u00e1ch v\u1eadn h\u00e0nh c\u1ee7a kho\u00e1 c\u00f4ng khai (Public Key)<\/strong><\/h2>\n

N\u00f3i l\u1ea1i cho d\u1ec5 h\u00ecnh dung: Kho\u00e1 ri\u00eang t\u01b0 t\u1ea1o ra kho\u00e1 c\u00f4ng khai, ti\u1ebfp \u0111\u00f3 kho\u00e1 c\u00f4ng khai n\u00e0y l\u1ea1i t\u1ea1o ra \u0111\u1ecba ch\u1ec9 v\u00ed c\u00f4ng khai. Kho\u00e1 ri\u00eang t\u01b0 -> Kho\u00e1 c\u00f4ng khai -> \u0110\u1ecba ch\u1ec9 v\u00ed Bitcoin<\/a>.<\/p>\n

Khi hai ng\u01b0\u1eddi quy\u1ebft \u0111\u1ecbnh mua b\u00e1n giao d\u1ecbch, c\u00e1c b\u1ea1n s\u1ebd cho bi\u1ebft \u0111\u1ecba ch\u1ec9 c\u00f4ng khai c\u1ee7a nhau. N\u00f3 gi\u1ed1ng nh\u01b0 s\u1ed1 t\u00e0i kho\u1ea3n ng\u00e2n h\u00e0ng v\u1eady. Ng\u01b0\u1eddi g\u1eedi c\u1ea7n \u0111\u1ecba ch\u1ec9 \u0111\u00f3 \u0111\u1ec3 g\u1eedi ti\u1ec1n \u0111\u1ebfn. C\u00f2n ng\u01b0\u1eddi nh\u1eadn th\u00ec c\u1ea7n \u0111\u1ecba ch\u1ec9 \u0111\u00f3 \u0111\u1ec3 r\u00fat ti\u1ec1n c\u1ee7a m\u00ecnh. Ng\u01b0\u1eddi nh\u1eadn c\u0169ng c\u00f3 th\u1ec3 x\u00e1c nh\u1eadn s\u1ed1 ti\u1ec1n qua \u0111\u1ecba ch\u1ec9 c\u00f4ng khai c\u1ee7a ng\u01b0\u1eddi g\u1eedi (xem \u0111\u00fang ng\u01b0\u1eddi n\u00e0y g\u1eedi kh\u00f4ng).<\/p>\n

M\u1eb7c d\u00f9 kho\u00e1 v\u00e0 \u0111\u1ecba ch\u1ec9 c\u00f4ng khai \u0111\u01b0\u1ee3c t\u1ea1o ra t\u1eeb kho\u00e1 ri\u00eang t\u01b0, nh\u01b0ng kh\u00f4ng th\u1ec3 l\u00e0m ng\u01b0\u1ee3c l\u1ea1i. N\u00f3 m\u00e3 ho\u00e1 m\u1ed9t chi\u1ec1u th\u00f4i. T\u1ee9c kh\u00f4ng th\u1ec3 d\u1ef1a v\u00e0o \u0111\u1ecba ch\u1ec9 m\u00e0 t\u00ecm ra kho\u00e1 ri\u00eang t\u01b0 \u0111\u01b0\u1ee3c. Gi\u1ed1ng nh\u01b0 vi\u1ec7c kh\u00f4ng th\u1ec3 l\u1ea5y s\u1ed1 t\u00e0i kho\u1ea3n m\u00e0 l\u1ea7n ra m\u1eadt kh\u1ea9u c\u1ee7a b\u1ea1n \u0111\u01b0\u1ee3c.<\/p>\n

H\u1ec7 th\u1ed1ng ti\u1ec1n m\u00e3 ho\u00e1 s\u1eed d\u1ee5ng thu\u1eadt to\u00e1n ph\u1ee9c t\u1ea1p \u0111\u1ec3 b\u1ea3o \u0111\u1ea3m kh\u00f4ng ai gi\u1ea3i m\u00e3 ng\u01b0\u1ee3c \u0111\u01b0\u1ee3c kho\u00e1 ri\u00eang t\u01b0 t\u1eeb kho\u00e1 c\u00f4ng khai. \u0110\u1eb7c bi\u1ec7t do chuy\u1ec7n ai c\u0169ng c\u00f3 th\u1ec3 th\u1ea5y kho\u00e1 c\u00f4ng khai m\u00ecnh \u0111\u01b0\u1ee3c tr\u00ean m\u1ea1ng l\u01b0\u1edbi.<\/p>\n

V\u00e0 c\u0169ng v\u00ec kh\u00f4ng th\u1ec3 gi\u1ea3i m\u00e3 ng\u01b0\u1ee3c, n\u00ean khi m\u1ea5t kho\u00e1 ri\u00eang t\u01b0, xem nh\u01b0 s\u1ed1 ti\u1ec1n trong \u0111\u1ecba ch\u1ec9 \u0111\u00f3 kh\u00f4ng bao gi\u1edd l\u1ea5y l\u1ea1i \u0111\u01b0\u1ee3c. B\u1ea1n c\u1ea7n \u0111\u1eb7c bi\u1ec7t l\u01b0u \u00fd \u0111i\u1ec1u n\u00e0y! C\u00f2n kho\u00e1 c\u00f4ng khai th\u00ec d\u1ec5 th\u1edf h\u01a1n, n\u1ebfu m\u1ea5t th\u00ec c\u00f3 th\u1ec3 kh\u1edfi t\u1ea1o l\u1ea1i b\u1eb1ng kho\u00e1 ri\u00eang t\u01b0.<\/p>\n

L\u1eddi k\u1ebft<\/strong><\/h2>\n

B\u00e0i vi\u1ebft n\u00e0y \u0111\u00e3 gi\u1edbi thi\u1ec7u c\u00e1c b\u1ea1n c\u01a1 b\u1ea3n v\u1ec1 kho\u00e1 c\u00f4ng khai l\u00e0 g\u00ec, c\u00e1ch ch\u00fang ho\u1ea1t \u0111\u1ed9ng. Hi v\u1ecdng qua n\u1ed9i dung tr\u00ean s\u1ebd gi\u00fap b\u1ea1n hi\u1ec3u c\u00e1ch s\u1eed d\u1ee5ng kho\u00e1 c\u00f4ng khai, kho\u00e1 ri\u00eang t\u01b0. Ch\u00fac b\u1ea1n \u0111\u1ea7u t\u01b0 Bitcoin v\u00e0 ti\u1ec1n \u0111i\u1ec7n t\u1eed an to\u00e0n.<\/p>\n","protected":false},"excerpt":{"rendered":"

B\u00e0i vi\u1ebft s\u1ebd gi\u1edbi thi\u1ec7u \u0111\u1ed9c gi\u1ea3 kho\u00e1 c\u00f4ng khai l\u00e0 g\u00ec. C\u00e1ch kho\u00e1 c\u00f4ng khai (Public Key) \u0111\u01b0\u1ee3c t\u1ea1o ra nh\u01b0 th\u1ebf n\u00e0o v\u00e0 c\u00e1ch s\u1eed d\u1ee5ng ch\u00fang. \u0110\u00e2y l\u00e0 nh\u1eefng th\u00f4ng tin c\u1ea7n thi\u1ebft gi\u00fap b\u1ea1n \u0111\u1ea7u t\u01b0 Bitcoin an to\u00e0n.<\/p>\n","protected":false},"author":11,"featured_media":5431,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[142],"tags":[],"class_list":["post-5430","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-basic-guide"],"yoast_head":"\nKho\u00e1 c\u00f4ng khai (Public Key) l\u00e0 g\u00ec? - BitcoinVN News<\/title>\n<meta name=\"description\" content=\"Kho\u00e1 c\u00f4ng khai (Public Key) l\u00e0 m\u1ed9t \u0111o\u1ea1n m\u00e3 \u0111\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 nh\u1eadn coin. 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