{"id":12788,"date":"2025-09-17T03:12:11","date_gmt":"2025-09-17T03:12:11","guid":{"rendered":"https:\/\/buvei.com\/blog\/?p=12788"},"modified":"2025-09-17T03:12:11","modified_gmt":"2025-09-17T03:12:11","slug":"basic-science-cryptographic-primitives-in-payment-systems-6","status":"publish","type":"post","link":"https:\/\/buvei.com\/blog\/vi\/basic-science-cryptographic-primitives-in-payment-systems-6\/","title":{"rendered":"M\u1eadt m\u00e3 h\u1ecdc v\u00e0 th\u1ebb \u1ea3o Buvei: N\u1ec1n t\u1ea3ng b\u1ea3o m\u1eadt cho thanh to\u00e1n s\u1ed1"},"content":{"rendered":"

Gi\u1edbi thi\u1ec7u<\/h2>\n

C\u00e1c h\u1ec7 th\u1ed1ng thanh to\u00e1n hi\u1ec7n \u0111\u1ea1i\u2014t\u1eeb mua s\u1eafm tr\u1ef1c tuy\u1ebfn, v\u00ed \u0111i\u1ec7n t\u1eed \u0111\u1ebfn giao d\u1ecbch qu\u1ea3ng c\u00e1o qu\u1ed1c t\u1ebf\u2014\u0111\u1ec1u d\u1ef1a tr\u00ean n\u1ec1n t\u1ea3ng v\u00f4 h\u00ecnh c\u1ee7a c\u00e1c nguy\u00ean th\u1ee7y m\u1eadt m\u00e3 h\u1ecdc. \u0110\u00e2y l\u00e0 nh\u1eefng c\u00f4ng c\u1ee5 to\u00e1n h\u1ecdc v\u00e0 thu\u1eadt to\u00e1n b\u1ea3o m\u1eadt gi\u00fap giao d\u1ecbch duy tr\u00ec t\u00ednh ri\u00eang t\u01b0, t\u00ednh x\u00e1c th\u1ef1c v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng gi\u1ea3 m\u1ea1o. N\u1ebfu thi\u1ebfu ch\u00fang, thanh to\u00e1n s\u1ed1 s\u1ebd d\u1ec5 d\u00e0ng b\u1ecb gian l\u1eadn, \u0111\u00e1nh c\u1eafp d\u1eef li\u1ec7u v\u00e0 r\u00f2 r\u1ec9 th\u00f4ng tin.<\/p>\n

B\u00e0i vi\u1ebft n\u00e0y s\u1ebd ph\u00e2n t\u00edch c\u00e1c nguy\u00ean th\u1ee7y m\u1eadt m\u00e3 h\u1ecdc n\u1ec1n t\u1ea3ng trong h\u1ec7 th\u1ed1ng thanh to\u00e1n v\u00e0 c\u00e1ch ch\u00fang \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf. \u0110\u1ed3ng th\u1eddi, ch\u00fang t\u00f4i c\u0169ng gi\u1edbi thi\u1ec7u c\u00e1ch th\u1ebb \u1ea3o Buvei<\/a> gi\u00fap t\u0103ng c\u01b0\u1eddng b\u1ea3o m\u1eadt, gi\u1ea3m chi ph\u00ed v\u00e0 mang \u0111\u1ebfn kh\u1ea3 n\u0103ng ki\u1ec3m so\u00e1t t\u1ed1i \u01b0u cho doanh nghi\u1ec7p trong th\u1ebf gi\u1edbi t\u00e0i ch\u00ednh s\u1ed1.<\/p>\n

\"\"<\/p>\n

H\u00e0m b\u0103m: \u0110\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u<\/h2>\n

M\u1ed9t trong nh\u1eefng n\u1ec1n t\u1ea3ng quan tr\u1ecdng c\u1ee7a c\u00f4ng ngh\u1ec7 thanh to\u00e1n l\u00e0 h\u00e0m b\u0103m m\u1eadt m\u00e3. H\u00e0m b\u0103m nh\u1eadn \u0111\u1ea7u v\u00e0o (nh\u01b0 chi ti\u1ebft giao d\u1ecbch) v\u00e0 t\u1ea1o ra m\u1ed9t \u201cd\u1ea5u v\u00e2n tay s\u1ed1\u201d c\u00f3 \u0111\u1ed9 d\u00e0i c\u1ed1 \u0111\u1ecbnh, duy nh\u1ea5t cho d\u1eef li\u1ec7u \u0111\u00f3.<\/p>\n

T\u00ednh to\u00e0n v\u1eb9n: Ch\u1ec9 c\u1ea7n thay \u0111\u1ed5i m\u1ed9t bit d\u1eef li\u1ec7u, k\u1ebft qu\u1ea3 h\u00e0m b\u0103m s\u1ebd kh\u00e1c ho\u00e0n to\u00e0n, nh\u1edd \u0111\u00f3 m\u1ecdi h\u00e0nh vi gi\u1ea3 m\u1ea1o \u0111\u1ec1u d\u1ec5 d\u00e0ng b\u1ecb ph\u00e1t hi\u1ec7n.<\/p>\n

V\u00ed d\u1ee5: SHA-256 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong m\u1ea1ng l\u01b0\u1edbi thanh to\u00e1n v\u00e0 blockchain.<\/p>\n

\u1ee8ng d\u1ee5ng th\u1ef1c ti\u1ec5n: Khi b\u1ea1n x\u00e1c nh\u1eadn thanh to\u00e1n, h\u1ec7 th\u1ed1ng d\u00f9ng h\u00e0m b\u0103m \u0111\u1ec3 ki\u1ec3m tra d\u1eef li\u1ec7u kh\u00f4ng b\u1ecb thay \u0111\u1ed5i trong qu\u00e1 tr\u00ecnh truy\u1ec1n t\u1ea3i.<\/p>\n

\u0110\u1ed1i v\u1edbi thanh to\u00e1n qu\u1ea3ng c\u00e1o, n\u01a1i h\u00e0ng ngh\u00ecn vi giao d\u1ecbch di\u1ec5n ra m\u1ed7i ng\u00e0y, h\u00e0m b\u0103m gi\u00fap \u0111\u1ea3m b\u1ea3o t\u00ednh ch\u00ednh x\u00e1c c\u1ee7a s\u1ed1 ti\u1ec1n v\u00e0 t\u00e0i kho\u1ea3n t\u1eeb \u0111\u1ea7u \u0111\u1ebfn cu\u1ed1i.<\/p>\n

M\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng: B\u1ea3o v\u1ec7 d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m<\/h2>\n

M\u1ed7i khi b\u1ea1n nh\u1eadp s\u1ed1 th\u1ebb t\u00edn d\u1ee5ng ho\u1eb7c s\u1eed d\u1ee5ng th\u1ebb \u1ea3o, c\u00e1c thu\u1eadt to\u00e1n m\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng nh\u01b0 AES s\u1ebd gi\u1eef d\u1eef li\u1ec7u \u1edf tr\u1ea1ng th\u00e1i kh\u00f4ng th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c b\u1edfi b\u00ean th\u1ee9 ba.<\/p>\n

Kh\u00f3a b\u00ed m\u1eadt chung: Ng\u01b0\u1eddi g\u1eedi v\u00e0 ng\u01b0\u1eddi nh\u1eadn c\u00f9ng chia s\u1ebb m\u1ed9t kh\u00f3a b\u00ed m\u1eadt \u0111\u1ec3 m\u00e3 h\u00f3a v\u00e0 gi\u1ea3i m\u00e3 d\u1eef li\u1ec7u.<\/p>\n

\u1ee8ng d\u1ee5ng: Trong m\u1ea1ng l\u01b0\u1edbi th\u1ebb, chi ti\u1ebft thanh to\u00e1n \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a tr\u01b0\u1edbc khi g\u1eedi qua Internet.<\/p>\n

T\u1ed1c \u0111\u1ed9: M\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng c\u00f3 kh\u1ea3 n\u0103ng x\u1eed l\u00fd c\u1ef1c nhanh, ph\u00f9 h\u1ee3p v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng h\u00e0ng tri\u1ec7u giao d\u1ecbch m\u1ed7i ng\u00e0y.<\/p>\n

\u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng khi d\u1eef li\u1ec7u di chuy\u1ec3n gi\u1eefa ng\u00e2n h\u00e0ng, n\u1ec1n t\u1ea3ng qu\u1ea3ng c\u00e1o v\u00e0 nh\u00e0 b\u00e1n h\u00e0ng.<\/p>\n

M\u1eadt m\u00e3 b\u1ea5t \u0111\u1ed1i x\u1ee9ng: T\u1ea1o d\u1ef1ng ni\u1ec1m tin gi\u1eefa c\u00e1c n\u1ec1n t\u1ea3ng<\/h2>\n

M\u1eb7c d\u00f9 m\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng nhanh, nh\u01b0ng vi\u1ec7c chia s\u1ebb kh\u00f3a b\u00ed m\u1eadt gi\u1eefa hai b\u00ean lu\u00f4n ti\u1ec1m \u1ea9n r\u1ee7i ro. \u0110\u1ec3 gi\u1ea3i quy\u1ebft, h\u1ec7 th\u1ed1ng thanh to\u00e1n s\u1eed d\u1ee5ng m\u1eadt m\u00e3 b\u1ea5t \u0111\u1ed1i x\u1ee9ng<\/a> (c\u1eb7p kh\u00f3a c\u00f4ng khai\/b\u00ed m\u1eadt).<\/p>\n

Kh\u00f3a c\u00f4ng khai: D\u00f9ng \u0111\u1ec3 m\u00e3 h\u00f3a d\u1eef li\u1ec7u ho\u1eb7c x\u00e1c minh ch\u1eef k\u00fd s\u1ed1.<\/p>\n

Kh\u00f3a b\u00ed m\u1eadt: Ch\u1ec9 ch\u1ee7 s\u1edf h\u1eefu n\u1eafm gi\u1eef, d\u00f9ng \u0111\u1ec3 gi\u1ea3i m\u00e3 ho\u1eb7c k\u00fd s\u1ed1.<\/p>\n

\u1ee8ng d\u1ee5ng:<\/p>\n