{"id":1545,"date":"2023-03-11T23:11:25","date_gmt":"2023-03-11T23:11:25","guid":{"rendered":"https:\/\/securitybriefing.net\/?p=1545"},"modified":"2024-05-31T23:44:31","modified_gmt":"2024-05-31T23:44:31","slug":"quyen-rieng-tu-va-bao-mat-la-dac-diem-chinh-cua-blockchain-phan-3","status":"publish","type":"post","link":"https:\/\/securitybriefing.net\/vi\/chuoi-khoi\/quyen-rieng-tu-va-bao-mat-la-dac-diem-chinh-cua-blockchain-phan-3\/","title":{"rendered":"Quy\u1ec1n ri\u00eang t\u01b0 v\u00e0 b\u1ea3o m\u1eadt l\u00e0 nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh c\u1ee7a Blockchain: Ph\u1ea7n 3"},"content":{"rendered":"

Trong hai ph\u1ea7n tr\u01b0\u1edbc, ch\u00fang ta \u0111\u00e3 \u0111i s\u00e2u v\u00e0o c\u00f4ng ngh\u1ec7 Blockchain, c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m v\u00e0 ch\u1ee9c n\u0103ng c\u1ee7a n\u00f3. Trong ph\u1ea7n cu\u1ed1i n\u00e0y, ch\u00fang ta s\u1ebd kh\u00e1m ph\u00e1 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u0103ng c\u01b0\u1eddng quy\u1ec1n ri\u00eang t\u01b0 v\u00e0 b\u1ea3o m\u1eadt. Tuy nhi\u00ean, b\u1ea5t ch\u1ea5p nh\u1eefng l\u1ee3i \u00edch c\u1ee7a n\u00f3, c\u00e1c giao d\u1ecbch Blockchain kh\u00f4ng \u1ea9n danh v\u00ec c\u00f4ng ch\u00fang c\u00f3 th\u1ec3 x\u00e1c minh \u0111\u1ecba ch\u1ec9, cho ph\u00e9p h\u1ecd theo d\u00f5i c\u00e1c giao d\u1ecbch \u1ea9n danh c\u1ee7a ng\u01b0\u1eddi d\u00f9ng.<\/p>\n\n\n\n

Khi danh t\u00ednh th\u1ef1c t\u1ebf c\u1ee7a ng\u01b0\u1eddi d\u00f9ng \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi \u0111\u1ecba ch\u1ec9 giao d\u1ecbch, \u0111i\u1ec1u n\u00e0y s\u1ebd khi\u1ebfn t\u1ea5t c\u1ea3 c\u00e1c giao d\u1ecbch c\u1ee7a h\u1ecd c\u00f3 nguy c\u01a1 ti\u1ec1m \u1ea9n. \u0110\u1ec3 ch\u1ed1ng l\u1ea1i \u0111i\u1ec1u n\u00e0y, c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n \u0111\u00e3 \u0111\u01b0a ra c\u00e1c d\u1ecbch v\u1ee5 h\u1ee3p nh\u1ea5t ho\u1eb7c flipper, gi\u00fap ng\u1eabu nhi\u00ean h\u00f3a c\u00e1c \u0111\u1ed3ng ti\u1ec1n c\u1ee7a ng\u01b0\u1eddi d\u00f9ng b\u1eb1ng c\u00e1ch h\u1ee3p nh\u1ea5t ch\u00fang v\u1edbi c\u00e1c \u0111\u1ed3ng ti\u1ec1n c\u1ee7a nh\u1eefng ng\u01b0\u1eddi d\u00f9ng kh\u00e1c. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y gi\u00fap b\u1ea3o v\u1ec7 t\u00ednh \u1ea9n danh c\u1ee7a ng\u01b0\u1eddi d\u00f9ng b\u1eb1ng c\u00e1ch ng\u0103n ch\u1eb7n vi\u1ec7c theo d\u00f5i c\u00e1c giao d\u1ecbch c\u1ee7a h\u1ecd.<\/p>\n\n\n\n

M\u1eb7c d\u00f9 vi\u1ec7c x\u00e1o tr\u1ed9n gi\u00fap che gi\u1ea5u quy\u1ec1n s\u1edf h\u1eefu ti\u1ec1n xu \u0111\u1ed1i v\u1edbi ng\u01b0\u1eddi quan s\u00e1t b\u00ean ngo\u00e0i, nh\u01b0ng d\u1ecbch v\u1ee5 tr\u1ed9n ti\u1ec1n xu kh\u00f4ng cung c\u1ea5p b\u1ea5t k\u1ef3 bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7 n\u00e0o ch\u1ed1ng l\u1ea1i t\u00ecnh tr\u1ea1ng tr\u1ed9m ti\u1ec1n xu.<\/p>\n\n\n

C\u00f3 hai d\u1ecbch v\u1ee5 tr\u1ed9n: Mixcoin v\u00e0 CoinJoin<\/strong><\/h3>\n\n\n

Ti\u1ec1n \u0111i\u1ec7n t\u1eed<\/strong> l\u00e0 k\u1ef9 thu\u1eadt \u0111\u1ea7u ti\u00ean ch\u1ed1ng l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng m\u1ea1ng th\u1ee5 \u0111\u1ed9ng b\u1eb1ng c\u00e1ch cho ph\u00e9p thanh to\u00e1n ti\u1ec1n \u0111i\u1ec7n t\u1eed \u1ea9n danh. N\u00f3 m\u1edf r\u1ed9ng b\u1ed9 \u1ea9n danh b\u1eb1ng c\u00e1ch cho ph\u00e9p t\u1ea5t c\u1ea3 ng\u01b0\u1eddi d\u00f9ng tr\u1ed9n ti\u1ec1n c\u1ee7a h\u1ecd c\u00f9ng m\u1ed9t l\u00fac. Mixcoin cung c\u1ea5p t\u00ednh \u1ea9n danh t\u01b0\u01a1ng t\u1ef1 nh\u01b0 giao ti\u1ebfp tr\u1ed9n truy\u1ec1n th\u1ed1ng \u0111\u1ec3 ch\u1ed1ng l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng m\u1ea1ng ch\u1ee7 \u0111\u1ed9ng.<\/p>\n\n\n\n

\u0110\u1ec3 ph\u00e1t hi\u1ec7n h\u00e0nh vi tr\u1ed9m c\u1eafp, Mixcoin s\u1eed d\u1ee5ng c\u01a1 ch\u1ebf gi\u1ea3i tr\u00ecnh nh\u1eb1m s\u1eafp x\u1ebfp c\u00e1c \u0111\u1ed9ng c\u01a1, cho th\u1ea5y ng\u01b0\u1eddi d\u00f9ng s\u1eed d\u1ee5ng Mixcoin m\u1ed9t c\u00e1ch h\u1ee3p l\u00fd m\u00e0 kh\u00f4ng \u0111\u00e1nh c\u1eafp ti\u1ec1n \u0111i\u1ec7n t\u1eed. <\/p>\n\n\n\n

M\u1eb7t kh\u00e1c, \u0110\u1ed3ng xuTham gia<\/strong> l\u00e0 d\u1ecbch v\u1ee5 tr\u1ed9n th\u1ee9 hai cho c\u00e1c giao d\u1ecbch ti\u1ec1n \u0111i\u1ec7n t\u1eed \u1ea9n danh. N\u00f3 d\u1ef1a tr\u00ean \u00fd t\u01b0\u1edfng thanh to\u00e1n chung, trong \u0111\u00f3 ng\u01b0\u1eddi d\u00f9ng t\u00ecm th\u1ea5y m\u1ed9t ng\u01b0\u1eddi d\u00f9ng kh\u00e1c c\u0169ng mu\u1ed1n th\u1ef1c hi\u1ec7n thanh to\u00e1n v\u00e0 th\u1ef1c hi\u1ec7n thanh to\u00e1n chung trong m\u1ed9t giao d\u1ecbch.<\/p>\n\n\n\n

S\u1eed d\u1ee5ng ph\u01b0\u01a1ng th\u1ee9c thanh to\u00e1n chung l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 kh\u1ea3 n\u0103ng li\u00ean k\u1ebft \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ea7u ra trong m\u1ed9t giao d\u1ecbch, khi\u1ebfn vi\u1ec7c theo d\u00f5i ch\u00ednh x\u00e1c d\u00f2ng ti\u1ec1n c\u1ee7a m\u1ed9t ng\u01b0\u1eddi d\u00f9ng c\u1ee5 th\u1ec3 tr\u1edf n\u00ean kh\u00f3 kh\u0103n. \u0110\u1ec3 s\u1eed d\u1ee5ng CoinJoin, ng\u01b0\u1eddi d\u00f9ng ph\u1ea3i trao \u0111\u1ed5i c\u00e1c giao d\u1ecbch m\u00e0 h\u1ecd \u0111\u1ecbnh h\u1ee3p nh\u1ea5t th\u00e0nh m\u1ed9t kho\u1ea3n thanh to\u00e1n chung. <\/p>\n\n\n\n

Tuy nhi\u00ean, th\u1ebf h\u1ec7 \u0111\u1ea7u ti\u00ean c\u1ee7a c\u00e1c d\u1ecbch v\u1ee5 k\u1ebft h\u1ee3p cung c\u1ea5p ch\u1ee9c n\u0103ng n\u00e0y d\u1ef1a tr\u00ean c\u00e1c m\u00e1y ch\u1ee7 t\u1eadp trung, \u0111i\u1ec1u n\u00e0y g\u00e2y ra r\u1ee7i ro v\u1ec1 quy\u1ec1n ri\u00eang t\u01b0 do c\u00f3 m\u1ed9t \u0111i\u1ec3m l\u1ed7i duy nh\u1ea5t. <\/p>\n\n\n\n

C\u00e1c d\u1ecbch v\u1ee5 n\u00e0y l\u01b0u gi\u1eef h\u1ed3 s\u01a1 giao d\u1ecbch v\u00e0 ghi l\u1ea1i t\u1ea5t c\u1ea3 nh\u1eefng ng\u01b0\u1eddi tham gia thanh to\u00e1n chung, y\u00eau c\u1ea7u ng\u01b0\u1eddi d\u00f9ng tin t\u01b0\u1edfng nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 s\u1ebd kh\u00f4ng th\u1ef1c hi\u1ec7n h\u00e0nh vi tr\u1ed9m c\u1eafp ho\u1eb7c cho ph\u00e9p ng\u01b0\u1eddi kh\u00e1c \u0111\u00e1nh c\u1eafp ti\u1ec1n \u0111i\u1ec7n t\u1eed c\u1ee7a h\u1ecd.<\/p>\n\n\n

Ch\u1eef k\u00fd \u1ea9n danh<\/strong><\/h2>\n\n\n

C\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n \u0111\u00e3 t\u1ea1o ra c\u00e1c bi\u1ebfn th\u1ec3 c\u00f4ng ngh\u1ec7 ch\u1eef k\u00fd s\u1ed1 c\u00f3 th\u1ec3 cung c\u1ea5p t\u00ednh \u1ea9n danh cho ng\u01b0\u1eddi k\u00fd, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 ch\u1eef k\u00fd \u1ea9n danh. Hai v\u00ed d\u1ee5 l\u00e0 ch\u1eef k\u00fd nh\u00f3m v\u00e0 ch\u1eef k\u00fd v\u00f2ng.<\/p>\n\n\n\n

K\u00fd nh\u00f3m cho ph\u00e9p m\u1ed9t th\u00e0nh vi\u00ean nh\u00f3m k\u00fd tin nh\u1eafn \u1ea9n danh b\u1eb1ng kh\u00f3a b\u00ed m\u1eadt c\u00e1 nh\u00e2n c\u1ee7a h\u1ecd. Kh\u00f3a c\u00f4ng khai c\u1ee7a nh\u00f3m x\u00e1c minh v\u00e0 x\u00e1c th\u1ef1c ch\u1eef k\u00fd nh\u00f3m, ch\u1ec9 ti\u1ebft l\u1ed9 t\u01b0 c\u00e1ch th\u00e0nh vi\u00ean nh\u00f3m c\u1ee7a ng\u01b0\u1eddi k\u00fd.<\/p>\n\n\n\n

Trong h\u1ec7 th\u1ed1ng Blockchain, m\u1ed9t th\u1ef1c th\u1ec3 \u0111\u01b0\u1ee3c \u1ee7y quy\u1ec1n l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 t\u1ea1o v\u00e0 qu\u1ea3n l\u00fd c\u00e1c nh\u00f3m \u0111\u1ec3 k\u00fd nh\u00f3m. Ch\u1eef k\u00fd v\u00f2ng ng\u0103n ch\u1eb7n vi\u1ec7c ti\u1ebft l\u1ed9 danh t\u00ednh c\u1ee7a ng\u01b0\u1eddi k\u00fd trong qu\u00e1 tr\u00ecnh tranh ch\u1ea5p v\u00e0 b\u1ea5t k\u1ef3 ng\u01b0\u1eddi d\u00f9ng n\u00e0o c\u0169ng c\u00f3 th\u1ec3 t\u1ea1o m\u1ed9t 'v\u00f2ng' m\u00e0 kh\u00f4ng c\u1ea7n c\u1ea5u h\u00ecnh b\u1ed5 sung. Thu\u1eadt ng\u1eef "ch\u1eef k\u00fd v\u00f2ng" xu\u1ea5t ph\u00e1t t\u1eeb thu\u1eadt to\u00e1n ch\u1eef k\u00fd s\u1eed d\u1ee5ng c\u1ea5u tr\u00fac h\u00ecnh v\u00f2ng.<\/p>\n\n\n

M\u00e3 h\u00f3a \u0111\u1ed3ng c\u1ea5u (HE)<\/strong><\/h2>\n\n\n

M\u1eadt m\u00e3 \u0111\u1ed3ng h\u00ecnh s\u1eed d\u1ee5ng m\u1ed9t m\u1eadt m\u00e3 m\u1ea1nh m\u1ebd t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho c\u00e1c ph\u00e9p t\u00ednh tr\u1ef1c ti\u1ebfp tr\u00ean v\u0103n b\u1ea3n m\u00e3 h\u00f3a. Khi gi\u1ea3i m\u00e3 c\u00e1c k\u1ebft qu\u1ea3 t\u00ednh to\u00e1n, c\u00e1c ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u00ean d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a t\u1ea1o ra c\u00e1c k\u1ebft qu\u1ea3 v\u0103n b\u1ea3n thu\u1ea7n t\u00fay gi\u1ed1ng h\u1ec7t nhau. C\u00e1c h\u1ec7 th\u1ed1ng \u0111\u1ed3ng h\u00ecnh m\u1ed9t ph\u1ea7n v\u00e0 ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 l\u01b0u tr\u1eef d\u1eef li\u1ec7u tr\u00ean blockchain v\u1edbi c\u00e1c \u0111i\u1ec1u ch\u1ec9nh t\u1ed1i thi\u1ec3u, \u0111\u1ea3m b\u1ea3o c\u00e1c m\u1ed1i quan ng\u1ea1i v\u1ec1 quy\u1ec1n ri\u00eang t\u01b0 li\u00ean quan \u0111\u1ebfn blockchain c\u00f4ng khai \u0111\u01b0\u1ee3c gi\u1ea3m thi\u1ec3u. <\/p>\n\n\n\n

K\u1ef9 thu\u1eadt n\u00e0y cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 quy\u1ec1n ri\u00eang t\u01b0 v\u00e0 cho ph\u00e9p truy c\u1eadp d\u1ec5 d\u00e0ng v\u00e0o th\u00f4ng tin \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a \u0111\u1ec3 qu\u1ea3n l\u00fd chi ph\u00ed nh\u00e2n vi\u00ean, ki\u1ec3m to\u00e1n v\u00e0 c\u00e1c m\u1ee5c \u0111\u00edch kh\u00e1c.<\/p>\n\n\n

M\u00e3 h\u00f3a d\u1ef1a tr\u00ean thu\u1ed9c t\u00ednh (ABE)<\/strong><\/h2>\n\n\n

M\u00e3 h\u00f3a d\u1ef1a tr\u00ean thu\u1ed9c t\u00ednh l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p m\u1eadt m\u00e3 x\u00e1c \u0111\u1ecbnh v\u00e0 qu\u1ea3n l\u00fd v\u0103n b\u1ea3n m\u00e3 h\u00f3a v\u1edbi c\u00e1c thu\u1ed9c t\u00ednh kh\u00f3a b\u00ed m\u1eadt c\u1ee7a ng\u01b0\u1eddi d\u00f9ng. Gi\u1ea3i m\u00e3 ch\u1ec9 c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c n\u1ebfu c\u00e1c thu\u1ed9c t\u00ednh kh\u1edbp v\u1edbi c\u00e1c thu\u1ed9c t\u00ednh v\u0103n b\u1ea3n m\u00e3 h\u00f3a. ABE r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi kh\u1ea3 n\u0103ng ch\u1ed1ng th\u00f4ng \u0111\u1ed3ng \u0111\u1ec3 ng\u0103n ch\u1eb7n nh\u1eefng k\u1ebb t\u1ea5n c\u00f4ng m\u1ea1ng truy c\u1eadp v\u00e0o d\u1eef li\u1ec7u kh\u00e1c. Tuy nhi\u00ean, ABE ch\u01b0a \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng hi\u1ec7u qu\u1ea3 do thi\u1ebfu hi\u1ec3u bi\u1ebft v\u1ec1 nh\u1eefng \u0111i\u1ec1u c\u01a1 b\u1ea3n v\u00e0 tri\u1ec3n khai hi\u1ec7u qu\u1ea3. Hi\u1ec7n t\u1ea1i, kh\u00f4ng c\u00f3 ho\u1ea1t \u0111\u1ed9ng th\u1eddi gian th\u1ef1c n\u00e0o tri\u1ec3n khai ABE tr\u00ean blockchain.<\/p>\n\n\n

M\u00e1y t\u00ednh \u0111a b\u00ean an to\u00e0n (MPC)<\/strong><\/h2>\n\n\n

Secure Multi-Party Computing l\u00e0 m\u1ed9t giao th\u1ee9c \u0111a b\u00ean c\u00f9ng th\u1ef1c hi\u1ec7n c\u00e1c ph\u00e9p t\u00ednh tr\u00ean d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o ri\u00eang t\u01b0 m\u00e0 kh\u00f4ng vi ph\u1ea1m quy\u1ec1n ri\u00eang t\u01b0 c\u1ee7a d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o. K\u1ebb t\u1ea5n c\u00f4ng m\u1ea1ng kh\u00f4ng bi\u1ebft g\u00ec v\u1ec1 d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o t\u1eeb m\u1ed9t b\u00ean x\u00e1c th\u1ef1c m\u00e0 ch\u1ec9 bi\u1ebft t\u1eeb b\u00ean tho\u00e1t. S\u1ef1 th\u00e0nh c\u00f4ng c\u1ee7a vi\u1ec7c s\u1eed d\u1ee5ng MPC trong b\u1ecf phi\u1ebfu ph\u00e2n t\u00e1n, \u0111\u1ea5u th\u1ea7u ri\u00eang t\u01b0 v\u00e0 truy xu\u1ea5t th\u00f4ng tin ri\u00eang t\u01b0 \u0111\u00e3 bi\u1ebfn n\u00f3 th\u00e0nh m\u1ed9t gi\u1ea3i ph\u00e1p ph\u1ed5 bi\u1ebfn cho nhi\u1ec1u v\u1ea5n \u0111\u1ec1 trong th\u1ebf gi\u1edbi th\u1ef1c. L\u1ea7n tri\u1ec3n khai MPC quy m\u00f4 l\u1edbn \u0111\u1ea7u ti\u00ean l\u00e0 v\u00e0o n\u0103m 2008 cho m\u1ed9t v\u1ea5n \u0111\u1ec1 \u0111\u1ea5u gi\u00e1 tuy\u1ec7t \u0111\u1ed1i \u1edf \u0110an M\u1ea1ch. C\u00e1c h\u1ec7 th\u1ed1ng chu\u1ed7i kh\u1ed1i \u0111\u00e3 s\u1eed d\u1ee5ng MPC trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y \u0111\u1ec3 b\u1ea3o v\u1ec7 quy\u1ec1n ri\u00eang t\u01b0 c\u1ee7a ng\u01b0\u1eddi d\u00f9ng.<\/p>\n\n\n

B\u1eb1ng ch\u1ee9ng kh\u00f4ng ki\u1ebfn th\u1ee9c kh\u00f4ng t\u01b0\u01a1ng t\u00e1c (NIZK)<\/strong><\/h2>\n\n\n

B\u1eb1ng ch\u1ee9ng kh\u00f4ng ki\u1ebfn th\u1ee9c kh\u00f4ng t\u01b0\u01a1ng t\u00e1c l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 m\u1eadt m\u00e3 cung c\u1ea5p c\u00e1c thu\u1ed9c t\u00ednh b\u1ea3o v\u1ec7 quy\u1ec1n ri\u00eang t\u01b0 m\u1ea1nh m\u1ebd. Kh\u00e1i ni\u1ec7m c\u1ed1t l\u00f5i li\u00ean quan \u0111\u1ebfn vi\u1ec7c t\u1ea1o ra m\u1ed9t b\u00e0i ki\u1ec3m tra ch\u00ednh th\u1ee9c \u0111\u1ec3 x\u00e1c nh\u1eadn xem m\u1ed9t ch\u01b0\u01a1ng tr\u00ecnh, \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n v\u1edbi d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o ch\u1ec9 ng\u01b0\u1eddi d\u00f9ng bi\u1ebft, c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c k\u1ebft qu\u1ea3 c\u00f3 th\u1ec3 truy c\u1eadp c\u00f4ng khai m\u00e0 kh\u00f4ng ti\u1ebft l\u1ed9 th\u00f4ng tin b\u1ed5 sung hay kh\u00f4ng.<\/p>\n\n\n\n

N\u00f3i c\u00e1ch kh\u00e1c, ng\u01b0\u1eddi ch\u1ee9ng nh\u1eadn c\u00f3 th\u1ec3 ch\u1ee9ng minh v\u1edbi ng\u01b0\u1eddi x\u00e1c minh r\u1eb1ng m\u1ed9t kh\u1eb3ng \u0111\u1ecbnh l\u00e0 \u0111\u00fang m\u00e0 kh\u00f4ng c\u1ea7n cung c\u1ea5p th\u00f4ng tin h\u1eefu \u00edch. C\u00e1c \u1ee9ng d\u1ee5ng Blockchain l\u01b0u tr\u1eef t\u1ea5t c\u1ea3 s\u1ed1 d\u01b0 t\u00e0i kho\u1ea3n tr\u00ean chu\u1ed7i \u1edf \u0111\u1ecbnh d\u1ea1ng \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a. S\u1eed d\u1ee5ng b\u1eb1ng ch\u1ee9ng kh\u00f4ng ki\u1ebfn th\u1ee9c, ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng ch\u1ee9ng minh v\u1edbi ng\u01b0\u1eddi d\u00f9ng kh\u00e1c r\u1eb1ng h\u1ecd c\u00f3 \u0111\u1ee7 s\u1ed1 d\u01b0 \u0111\u1ec3 chuy\u1ec3n ti\u1ec1n m\u00e0 kh\u00f4ng c\u1ea7n ti\u1ebft l\u1ed9 s\u1ed1 d\u01b0 t\u00e0i kho\u1ea3n c\u1ee7a m\u00ecnh.<\/p>\n\n\n

H\u1ee3p \u0111\u1ed3ng th\u00f4ng minh d\u1ef1a tr\u00ean M\u00f4i tr\u01b0\u1eddng th\u1ef1c thi \u0111\u00e1ng tin c\u1eady (TEE):<\/strong><\/h2>\n\n\n

K\u1ef9 thu\u1eadt n\u00e0y cung c\u1ea5p m\u1ed9t m\u00f4i tr\u01b0\u1eddng ho\u00e0n to\u00e0n bi\u1ec7t l\u1eadp cho \u1ee9ng d\u1ee5ng, ng\u0103n ch\u1eb7n c\u00e1c \u1ee9ng d\u1ee5ng ph\u1ea7n m\u1ec1m v\u00e0 h\u1ec7 \u0111i\u1ec1u h\u00e0nh kh\u00e1c can thi\u1ec7p v\u00e0 bi\u1ebft \u0111\u01b0\u1ee3c tr\u1ea1ng th\u00e1i c\u1ee7a \u1ee9ng d\u1ee5ng \u0111ang ch\u1ea1y tr\u00ean \u0111\u00f3. Ph\u1ea7n m\u1ec1m Intel Guard eXtensions (SGX) l\u00e0 c\u00f4ng ngh\u1ec7 tri\u1ec3n khai TEE ti\u00eau bi\u1ec3u.<\/p>\n\n\n

H\u1ee3p \u0111\u1ed3ng th\u00f4ng minh d\u1ef1a tr\u00ean tr\u00f2 ch\u01a1i<\/strong><\/h2>\n\n\n

C\u00e1c gi\u1ea3i ph\u00e1p d\u1ef1a tr\u00ean tr\u00f2 ch\u01a1i \u0111\u1ec3 x\u00e1c minh h\u1ee3p \u0111\u1ed3ng th\u00f4ng minh l\u00e0 nh\u1eefng ph\u00e1t tri\u1ec3n g\u1ea7n \u0111\u00e2y s\u1eed d\u1ee5ng "tr\u00f2 ch\u01a1i x\u00e1c minh" t\u01b0\u01a1ng t\u00e1c \u0111\u1ec3 quy\u1ebft \u0111\u1ecbnh xem m\u1ed9t t\u00e1c v\u1ee5 t\u00ednh to\u00e1n c\u00f3 th\u00e0nh c\u00f4ng hay kh\u00f4ng. C\u00e1c gi\u1ea3i ph\u00e1p n\u00e0y cung c\u1ea5p ph\u1ea7n th\u01b0\u1edfng \u0111\u1ec3 khuy\u1ebfn kh\u00edch ng\u01b0\u1eddi ch\u01a1i x\u00e1c minh c\u00e1c t\u00e1c v\u1ee5 t\u00ednh to\u00e1n v\u00e0 t\u00ecm l\u1ed7i \u0111\u1ec3 h\u1ee3p \u0111\u1ed3ng th\u00f4ng minh c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n t\u00ednh to\u00e1n t\u00e1c v\u1ee5 m\u1ed9t c\u00e1ch an to\u00e0n v\u1edbi c\u00e1c thu\u1ed9c t\u00ednh c\u00f3 th\u1ec3 x\u00e1c minh.<\/p>\n\n\n\n

Trong m\u1ed7i v\u00f2ng c\u1ee7a \u201ctr\u00f2 ch\u01a1i x\u00e1c minh\u201d, tr\u00ecnh x\u00e1c minh s\u1ebd ki\u1ec3m tra \u0111\u1ec7 quy m\u1ed9t t\u1eadp h\u1ee3p con nh\u1ecf h\u01a1n c\u1ee7a ph\u00e9p t\u00ednh, gi\u1ea3m \u0111\u00e1ng k\u1ec3 t\u1ea3i t\u00ednh to\u00e1n tr\u00ean c\u00e1c n\u00fat. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y cung c\u1ea5p m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7u qu\u1ea3 v\u00e0 hi\u1ec7u qu\u1ea3 \u0111\u1ec3 x\u00e1c minh h\u1ee3p \u0111\u1ed3ng th\u00f4ng minh.<\/p>\n\n\n

K\u1ebft lu\u1eadn<\/strong><\/h2>\n\n\n

Ch\u00fang t\u00f4i \u0111\u00e3 m\u00f4 t\u1ea3 c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 k\u1ef9 thu\u1eadt b\u1ea3o m\u1eadt v\u00e0 quy\u1ec1n ri\u00eang t\u01b0 c\u1ee7a Blockchain \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c ch\u00fang trong c\u00e1c h\u1ec7 th\u1ed1ng v\u00e0 \u1ee9ng d\u1ee5ng d\u1ef1a tr\u00ean blockchain, bao g\u1ed3m c\u00e1c thu\u1eadt to\u00e1n \u0111\u1ed3ng thu\u1eadn, x\u00e1o tr\u1ed9n, ch\u1eef k\u00fd \u1ea9n danh, m\u00e3 h\u00f3a, \u0111i\u1ec7n to\u00e1n \u0111a ph\u01b0\u01a1ng an to\u00e0n, b\u1eb1ng ch\u1ee9ng kh\u00f4ng ki\u1ebfn th\u1ee9c kh\u00f4ng t\u01b0\u01a1ng t\u00e1c v\u00e0 x\u00e1c minh an to\u00e0n c\u00e1c h\u1ee3p \u0111\u1ed3ng th\u00f4ng minh.<\/p>\n\n\n\n

M\u1eb7c d\u00f9 ch\u1ec9 m\u1ed9t s\u1ed1 \u00edt n\u1ec1n t\u1ea3ng Blockchain c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u00e1c m\u1ee5c ti\u00eau b\u1ea3o m\u1eadt \u0111\u00e3 \u0111\u1eb7t ra, nh\u01b0ng b\u1ea3o m\u1eadt v\u00e0 quy\u1ec1n ri\u00eang t\u01b0 c\u1ee7a Blockchain \u0111\u00e3 thu h\u00fat \u0111\u01b0\u1ee3c s\u1ef1 quan t\u00e2m \u0111\u00e1ng k\u1ec3 t\u1eeb nghi\u00ean c\u1ee9u h\u1ecdc thu\u1eadt v\u00e0 ng\u00e0nh c\u00f4ng nghi\u1ec7p. Hi\u1ec3u \u0111\u01b0\u1ee3c c\u00e1c \u0111\u1eb7c t\u00ednh b\u1ea3o m\u1eadt v\u00e0 quy\u1ec1n ri\u00eang t\u01b0 c\u1ee7a Blockchain l\u00e0 r\u1ea5t quan tr\u1ecdng trong vi\u1ec7c t\u0103ng c\u01b0\u1eddng l\u00f2ng tin v\u00e0 ph\u00e1t tri\u1ec3n c\u00e1c k\u1ef9 thu\u1eadt ph\u00f2ng th\u1ee7 v\u00e0 bi\u1ec7n ph\u00e1p \u0111\u1ed1i ph\u00f3. Ph\u00e1t tri\u1ec3n c\u00e1c thu\u1eadt to\u00e1n m\u1eadt m\u00e3 nh\u1eb9 v\u00e0 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o m\u1eadt v\u00e0 quy\u1ec1n ri\u00eang t\u01b0 th\u1ef1c t\u1ebf l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n trong t\u01b0\u01a1ng lai c\u1ee7a Blockchain v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee7a n\u00f3.<\/p>","protected":false},"excerpt":{"rendered":"

Trong hai ph\u1ea7n tr\u01b0\u1edbc, ch\u00fang ta \u0111\u00e3 \u0111i s\u00e2u v\u00e0o c\u00f4ng ngh\u1ec7 Blockchain, c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m v\u00e0 ch\u1ee9c n\u0103ng c\u1ee7a n\u00f3. Trong ph\u1ea7n cu\u1ed1i n\u00e0y, ch\u00fang ta s\u1ebd kh\u00e1m ph\u00e1 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u0103ng c\u01b0\u1eddng quy\u1ec1n ri\u00eang t\u01b0 v\u00e0 b\u1ea3o m\u1eadt. Tuy nhi\u00ean, m\u1eb7c d\u00f9\u2026 Ti\u1ebfp t\u1ee5c \u0111\u1ecdc Quy\u1ec1n ri\u00eang t\u01b0 v\u00e0 b\u1ea3o m\u1eadt l\u00e0 nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh c\u1ee7a Blockchain: Ph\u1ea7n 3<\/span><\/a><\/p>","protected":false},"author":3,"featured_media":1547,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-1545","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blockchain","entry"],"yoast_head":"\nPrivacy and Security in Blockchain - Part III | Security Briefing<\/title>\n<meta name=\"description\" content=\"Discover the privacy and security features of blockchain in Part 3. 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