{"id":8502,"date":"2023-10-25T17:19:22","date_gmt":"2023-10-25T10:19:22","guid":{"rendered":"https:\/\/vacif.com\/?p=8502"},"modified":"2023-10-25T17:19:22","modified_gmt":"2023-10-25T10:19:22","slug":"cac-loai-xac-thuc-hai-yeu-to-2fa-uu-va-nhuoc-diem","status":"publish","type":"post","link":"https:\/\/vacif.com\/en\/cac-loai-xac-thuc-hai-yeu-to-2fa-uu-va-nhuoc-diem\/","title":{"rendered":"C\u00c1C LO\u1ea0I X\u00c1C TH\u1ef0C HAI Y\u1ebeU T\u1ed0 (2FA): \u01afU V\u00c0 NH\u01af\u1ee2C \u0110I\u1ec2M."},"content":{"rendered":"\n

2FA \u0111\u00f3 l\u00e0 m\u1ed9t c\u01a1 ch\u1ebf x\u00e1c th\u1ef1c quy\u1ec1n truy c\u1eadp d\u1ef1a tr\u00ean hai ph\u01b0\u01a1ng th\u1ee9c x\u00e1c th\u1ef1c c\u01a1 b\u1ea3n kh\u00e1c nhau. Ng\u01b0\u1eddi d\u00f9ng c\u1ea7n x\u00e1c th\u1ef1c hai y\u1ebfu t\u1ed1 \u0111\u1ec3 b\u1ea3o v\u1ec7 t\u00e0i kho\u1ea3n c\u1ee7a m\u00ecnh m\u1ed9t c\u00e1ch \u0111\u00e1ng tin c\u1eady h\u01a1n: trong khi m\u1ed7i ph\u01b0\u01a1ng th\u1ee9c x\u00e1c th\u1ef1c ri\u00eang l\u1ebb \u0111\u1ec1u d\u1ec5 b\u1ecb t\u1ea5n c\u00f4ng, th\u00ec hai (ho\u1eb7c nhi\u1ec1u) ph\u01b0\u01a1ng th\u1ee9c x\u00e1c th\u1ef1c \u0111\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng c\u00f9ng nhau khi\u1ebfn vi\u1ec7c chi\u1ebfm \u0111o\u1ea1t t\u00e0i kho\u1ea3n tr\u1edf n\u00ean kh\u00f3 kh\u0103n h\u01a1n r\u1ea5t nhi\u1ec1u.<\/p>\n\n\n\n

Trong b\u00e0i \u0111\u0103ng n\u00e0y, ch\u00fang ta s\u1ebd t\u00ecm hi\u1ec3u v\u1ec1 c\u00e1c t\u00f9y ch\u1ecdn x\u00e1c th\u1ef1c \u0111a y\u1ebfu t\u1ed1 c\u00f3 s\u1eb5n, cung c\u1ea5p cho b\u1ea1n nh\u1eefng \u01b0u v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a t\u1eebng t\u00f9y ch\u1ecdn, \u0111\u1ed3ng th\u1eddi \u0111\u1ec1 xu\u1ea5t nh\u1eefng t\u00f9y ch\u1ecdn an to\u00e0n nh\u1ea5t \u0111\u1ec3 b\u1ea1n gi\u1eef an to\u00e0n cho t\u00e0i kho\u1ea3n c\u1ee7a m\u00ecnh.<\/p>\n\n\n\n

1. M\u00e3 m\u1ed9t l\u1ea7n (One-time codes) \u0111\u01b0\u1ee3c g\u1eedi qua SMS, email ho\u1eb7c cu\u1ed9c g\u1ecdi tho\u1ea1i<\/strong>.<\/p>\n\n\n\n

M\u1ed9t trong nh\u1eefng c\u01a1 ch\u1ebf x\u00e1c th\u1ef1c hai y\u1ebfu t\u1ed1 ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u1ec3 x\u00e1c th\u1ef1c \u0111\u0103ng nh\u1eadp l\u00e0 m\u00e3 m\u1ed9t l\u1ea7n. Ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1eedi d\u01b0\u1edbi d\u1ea1ng tin nh\u1eafn v\u0103n b\u1ea3n t\u1edbi s\u1ed1 \u0111i\u1ec7n tho\u1ea1i \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh trong qu\u00e1 tr\u00ecnh \u0111\u0103ng k\u00fd. Email c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho vi\u1ec7c n\u00e0y nh\u01b0ng \u00edt ph\u1ed5 bi\u1ebfn h\u01a1n. C\u00e1c d\u1ecbch v\u1ee5 ch\u00ednh th\u01b0\u1eddng c\u0169ng cung c\u1ea5p t\u00f9y ch\u1ecdn g\u1ecdi tho\u1ea1i \u0111\u1ebfn s\u1ed1 \u0111i\u1ec7n tho\u1ea1i \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh khi \u0111\u0103ng k\u00fd.<\/p>\n\n\n\n

D\u00f9 s\u1eed d\u1ee5ng k\u00eanh ph\u00e2n ph\u1ed1i n\u00e0o th\u00ec m\u1ee5c \u0111\u00edch \u0111\u1ec1u gi\u1ed1ng nhau: x\u00e1c minh kh\u1ea3 n\u0103ng truy c\u1eadp v\u00e0o m\u1ed9t s\u1ed1 t\u00e0i kho\u1ea3n ho\u1eb7c s\u1ed1 \u0111i\u1ec7n tho\u1ea1i kh\u00e1c m\u00e0 b\u1ea1n \u0111\u00e3 ch\u1ec9 \u0111\u1ecbnh khi \u0111\u0103ng k\u00fd d\u1ecbch v\u1ee5. Do \u0111\u00f3, n\u1ebfu ai \u0111\u00f3 \u0111\u00e1nh c\u1eafp m\u1eadt kh\u1ea9u c\u1ee7a b\u1ea1n trong khi kh\u00f4ng c\u00f3 quy\u1ec1n truy c\u1eadp v\u00e0o \u0111i\u1ec7n tho\u1ea1i c\u1ee7a b\u1ea1n, bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7 n\u00e0y s\u1ebd ho\u1ea1t \u0111\u1ed9ng t\u1ed1t.<\/p>\n\n\n

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Nh\u01b0ng c\u01a1 ch\u1ebf x\u00e1c th\u1ef1c hai y\u1ebfu t\u1ed1 n\u00e0y c\u00f3 nh\u01b0\u1ee3c \u0111i\u1ec3m. N\u1ebfu email \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c nh\u1eadn th\u00f4ng tin \u0111\u0103ng nh\u1eadp v\u00e0 m\u1eadt kh\u1ea9u \u0111\u1ec3 \u0111\u0103ng nh\u1eadp gi\u1ed1ng v\u1edbi t\u00e0i kho\u1ea3n b\u1ea1n \u0111ang c\u1ed1 b\u1ea3o v\u1ec7, b\u1ea1n s\u1ebd nh\u1eadn \u0111\u01b0\u1ee3c m\u1ee9c \u0111\u1ed9 b\u1ea3o m\u1eadt b\u1ed5 sung r\u1ea5t h\u1ea1n ch\u1ebf. K\u1ebb t\u1ea5n c\u00f4ng bi\u1ebft m\u1eadt kh\u1ea9u c\u1ee7a t\u00e0i kho\u1ea3n ch\u1eafc ch\u1eafn s\u1ebd th\u1eed m\u1eadt kh\u1ea9u \u0111\u00f3 \u0111\u1ec3 \u0111\u0103ng nh\u1eadp v\u00e0o email c\u1ee7a b\u1ea1n do \u0111\u00f3 nh\u1eadn \u0111\u01b0\u1ee3c m\u00e3 x\u00e1c th\u1ef1c m\u1ed9t l\u1ea7n.<\/p>\n\n\n\n

Vi\u1ec7c x\u00e1c th\u1ef1c th\u00f4ng qua s\u1ed1 \u0111i\u1ec7n tho\u1ea1i d\u00f9 b\u1eb1ng SMS hay cu\u1ed9c g\u1ecdi tho\u1ea1i l\u1ea1i c\u00f3 m\u1ed9t v\u1ea5n \u0111\u1ec1 kh\u00e1c: r\u1ea5t d\u1ec5 m\u1ea5t quy\u1ec1n truy c\u1eadp v\u00e0o s\u1ed1 \u0111i\u1ec7n tho\u1ea1i \u0111\u00f3. \u0110\u00f4i khi ng\u01b0\u1eddi d\u00f9ng ch\u1ec9 qu\u00ean n\u1ea1p ti\u1ec1n v\u00e0o t\u00e0i kho\u1ea3n \u0111i\u1ec7n tho\u1ea1i ho\u1eb7c b\u1ecb m\u1ea5t \u0111i\u1ec7n tho\u1ea1i ho\u1eb7c \u0111\u1ed5i s\u1ed1.<\/p>\n\n\n\n

C\u0169ng kh\u00f4ng c\u00f3 g\u00ec l\u1ea1 khi b\u1ecdn t\u1ed9i ph\u1ea1m thuy\u1ebft ph\u1ee5c c\u00e1c nh\u00e0 khai th\u00e1c vi\u1ec5n th\u00f4ng \u0111\u01b0a cho ch\u00fang th\u1ebb SIM c\u00f3 s\u1ed1 \u0111i\u1ec7n tho\u1ea1i c\u1ee7a n\u1ea1n nh\u00e2n, t\u1eeb \u0111\u00f3 c\u00f3 \u0111\u01b0\u1ee3c quy\u1ec1n truy c\u1eadp v\u00e0o m\u00e3 x\u00e1c th\u1ef1c. Ngo\u00e0i ra, tin nh\u1eafn v\u0103n b\u1ea3n c\u00f3 th\u1ec3 b\u1ecb ch\u1eb7n nh\u1eefng tr\u01b0\u1eddng h\u1ee3p nh\u01b0 v\u1eady \u0111\u00e3 \u0111\u01b0\u1ee3c b\u00e1o c\u00e1o.<\/p>\n\n\n\n

T\u00f3m l\u1ea1i: <\/strong>T\u00f9y ch\u1ecdn x\u00e1c th\u1ef1c hai y\u1ebfu t\u1ed1 n\u00e0y ho\u00e0n th\u00e0nh c\u00f4ng vi\u1ec7c nh\u01b0ng \u0111\u1ec3 b\u1ea3o v\u1ec7 nh\u1eefng t\u00e0i kho\u1ea3n c\u00f3 gi\u00e1 tr\u1ecb nh\u1ea5t \u0111\u1eb7c bi\u1ec7t l\u00e0 nh\u1eefng t\u00e0i kho\u1ea3n li\u00ean quan \u0111\u1ebfn t\u00e0i ch\u00ednh t\u1ed1t h\u01a1n l\u00e0 b\u1ea1n n\u00ean s\u1eed d\u1ee5ng th\u1ee9 g\u00ec \u0111\u00f3 \u0111\u00e1ng tin c\u1eady h\u01a1n.<\/p>\n\n\n\n

2. M\u1eadt kh\u1ea9u l\u00e0 y\u1ebfu t\u1ed1 th\u1ee9 hai<\/strong>.<\/p>\n\n\n\n

\u0110\u00f4i khi m\u1eadt kh\u1ea9u kh\u00f4ng ph\u1ea3i l\u00e0 y\u1ebfu t\u1ed1 \u0111\u1ea7u ti\u00ean m\u00e0 l\u00e0 y\u1ebfu t\u1ed1 th\u1ee9 hai. \u0110\u00e2y l\u00e0 \u0111i\u1ec1u m\u00e0 ng\u01b0\u1eddi \u0111\u01b0a tin th\u01b0\u1eddng l\u00e0m: theo m\u1eb7c \u0111\u1ecbnh, \u0111\u1ec3 \u0111\u0103ng nh\u1eadp, ch\u1ec9 c\u1ea7n nh\u1eadp m\u00e3 m\u1ed9t l\u1ea7n t\u1eeb SMS l\u00e0 \u0111\u1ee7. M\u1eadt kh\u1ea9u th\u01b0\u1eddng l\u00e0 t\u00f9y ch\u1ecdn. T\u00f9y ch\u1ecdn nh\u01b0ng c\u1ea7n thi\u1ebft, n\u00f3 s\u1ebd b\u1ea3o v\u1ec7 b\u1ea1n tr\u01b0\u1edbc h\u00e0ng lo\u1ea1t v\u1ea5n \u0111\u1ec1 ti\u1ec1m \u1ea9n ch\u1ec9 trong m\u1ed9t l\u1ea7n.<\/p>\n\n\n

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Quan tr\u1ecdng nh\u1ea5t, n\u00f3 s\u1ebd b\u1ea3o v\u1ec7 th\u01b0 t\u1eeb c\u1ee7a b\u1ea1n kh\u1ecfi vi\u1ec7c v\u00f4 t\u00ecnh m\u1ea5t quy\u1ec1n truy c\u1eadp v\u00e0o s\u1ed1 \u0111i\u1ec7n tho\u1ea1i b\u1ea1n \u0111\u00e3 s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u0103ng k\u00fd trong WhatsApp ho\u1eb7c Telegram. Gi\u1ea3 s\u1eed b\u1ea1n \u0111\u00e3 thay \u0111\u1ed5i s\u1ed1 \u0111i\u1ec7n tho\u1ea1i ch\u00ednh v\u00e0 c\u1ea5t th\u1ebb SIM c\u0169 v\u00e0o ng\u0103n k\u00e9o v\u00e0 \u0111\u00e3 l\u00e2u kh\u00f4ng tr\u1ea3 ti\u1ec1n. Nh\u00e0 \u0111i\u1ec1u h\u00e0nh s\u1ebd b\u00e1n l\u1ea1i s\u1ed1 c\u1ee7a b\u1ea1n sau m\u1ed9t th\u1eddi gian, do \u0111\u00f3 cho ph\u00e9p ch\u1ee7 s\u1edf h\u1eefu m\u1edbi \u0111\u0103ng nh\u1eadp v\u00e0o \u1ee9ng d\u1ee5ng nh\u1eafn tin d\u01b0\u1edbi t\u00ean c\u1ee7a b\u1ea1n t\u1ea5t nhi\u00ean tr\u1eeb khi s\u1ed1 \u0111\u00f3 \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1ed5 sung b\u1eb1ng m\u1eadt kh\u1ea9u.<\/p>\n\n\n\n

3. Danh s\u00e1ch m\u00e3 m\u1ed9t l\u1ea7n \u0111\u01b0\u1ee3c t\u1ea1o tr\u01b0\u1edbc<\/strong><\/p>\n\n\n\n

M\u1ed9t t\u00f9y ch\u1ecdn kh\u00e1c m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 g\u1eb7p l\u00e0 danh s\u00e1ch m\u00e3 d\u00f9ng m\u1ed9t l\u1ea7n \u0111\u01b0\u1ee3c t\u1ea1o tr\u01b0\u1edbc. C\u00e1c ng\u00e2n h\u00e0ng \u0111\u00f4i khi c\u1ea5p c\u00e1c danh s\u00e1ch nh\u01b0 v\u1eady cho kh\u00e1ch h\u00e0ng c\u1ee7a h\u1ecd \u0111\u1ec3 x\u00e1c nh\u1eadn giao d\u1ecbch, trong khi m\u1ed9t s\u1ed1 d\u1ecbch v\u1ee5 internet (ch\u1eb3ng h\u1ea1n nh\u01b0 Google) cho ph\u00e9p s\u1eed d\u1ee5ng ch\u00fang \u0111\u1ec3 kh\u00f4i ph\u1ee5c t\u00e0i kho\u1ea3n.<\/p>\n\n\n\n

\u0110\u00e2y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t c\u01a1 ch\u1ebf \u0111\u00e1ng tin c\u1eady: nh\u1eefng m\u00e3 nh\u01b0 v\u1eady c\u1ef1c k\u1ef3 hi\u1ebfm khi \u0111\u01b0\u1ee3c truy\u1ec1n \u0111\u1ebfn ng\u01b0\u1eddi d\u00f9ng, do \u0111\u00f3 c\u00f3 r\u1ea5t \u00edt c\u01a1 h\u1ed9i b\u1ecb ch\u1eb7n. C\u00e1c m\u00e3 n\u00e0y l\u00e0 ng\u1eabu nhi\u00ean, ngh\u0129a l\u00e0 ch\u00fang l\u00e0 duy nh\u1ea5t n\u00ean vi\u1ec7c \u0111o\u00e1n ch\u00fang g\u1ea7n nh\u01b0 l\u00e0 kh\u00f4ng th\u1ec3.<\/p>\n\n\n

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Nh\u01b0ng c\u00f3 v\u1ea5n \u0111\u1ec1 v\u1ec1 l\u01b0u tr\u1eef: n\u1ebfu k\u1ebb t\u1ea5n c\u00f4ng \u0111\u00e1nh c\u1eafp \u0111\u01b0\u1ee3c danh s\u00e1ch m\u00e3 \u0111\u01b0\u1ee3c t\u1ea1o tr\u01b0\u1edbc c\u1ee7a b\u1ea1n th\u00ec vi\u1ec7c chi\u1ebfm \u0111o\u1ea1t t\u00e0i kho\u1ea3n c\u1ee7a b\u1ea1n ho\u1eb7c l\u1ea5y tr\u1ed9m ti\u1ec1n t\u1eeb \u0111\u00f3 s\u1ebd c\u1ef1c k\u1ef3 d\u1ec5 d\u00e0ng.<\/p>\n\n\n\n

Tuy nhi\u00ean, \u0111i\u1ec3m b\u1ea5t ti\u1ec7n ch\u00ednh c\u1ee7a ph\u01b0\u01a1ng th\u1ee9c x\u00e1c th\u1ef1c n\u00e0y l\u00e0 n\u1ebfu b\u1ea1n c\u1ea7n x\u00e1c minh th\u01b0\u1eddng xuy\u00ean, b\u1ea1n s\u1ebd nhanh ch\u00f3ng h\u1ebft m\u00e3 \u0111\u01b0\u1ee3c t\u1ea1o tr\u01b0\u1edbc. \u0110i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 b\u1ea1n s\u1ebd ph\u1ea3i t\u1ea1o v\u00e0 l\u01b0u ng\u00e0y c\u00e0ng nhi\u1ec1u c\u00e1i m\u1edbi. N\u1ebfu duy tr\u00ec nhi\u1ec1u t\u00e0i kho\u1ea3n, b\u1ea1n s\u1ebd d\u1ec5 b\u1ecb nh\u1ea7m l\u1eabn b\u1edfi t\u1ea5t c\u1ea3 c\u00e1c danh s\u00e1ch \u0111\u00f3. Do \u0111\u00f3, m\u00e3 \u0111\u01b0\u1ee3c t\u1ea1o tr\u01b0\u1edbc l\u00e0m ph\u01b0\u01a1ng th\u1ee9c x\u00e1c th\u1ef1c ch\u00ednh \u0111\u00e3 \u0111\u01b0\u1ee3c thay th\u1ebf b\u1eb1ng m\u00e3 \u0111\u01b0\u1ee3c t\u1ea1o theo y\u00eau c\u1ea7u ngay khi b\u1ea1n c\u1ea7n ch\u00fang.<\/p>\n\n\n\n

4. M\u00e3 m\u1ed9t l\u1ea7n t\u1eeb \u1ee9ng d\u1ee5ng x\u00e1c th\u1ef1c<\/strong>.<\/p>\n\n\n\n

Vi\u1ec7c t\u1ea1o m\u00e3 m\u1ed9t l\u1ea7n \u201cnhanh ch\u00f3ng\u201d \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1edfi ng\u01b0\u1eddi x\u00e1c th\u1ef1c. \u0110\u00f4i khi \u0111\u00e2y c\u00f3 th\u1ec3 l\u00e0 nh\u1eefng thi\u1ebft b\u1ecb \u0111\u1ed9c l\u1eadp v\u1edbi m\u00e0n h\u00ecnh nh\u1ecf hi\u1ec3n th\u1ecb m\u00e3 hi\u1ec7n t\u1ea1i, m\u1ed9t s\u1ed1 ng\u00e2n h\u00e0ng cung c\u1ea5p c\u00e1c thi\u1ebft b\u1ecb x\u00e1c th\u1ef1c nh\u01b0 v\u1eady cho kh\u00e1ch h\u00e0ng c\u1ee7a h\u1ecd. Nh\u01b0ng ng\u00e0y nay, c\u00e1c \u1ee9ng d\u1ee5ng x\u00e1c th\u1ef1c \u0111\u1eb7c bi\u1ec7t ch\u1ea1y tr\u00ean \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh ph\u1ed5 bi\u1ebfn h\u01a1n c\u00e1c thi\u1ebft b\u1ecb \u0111\u1ed9c l\u1eadp. <\/p>\n\n\n

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\"\"<\/figure>\n<\/div>\n\n\n

5. Sinh tr\u1eafc h\u1ecdc: v\u00e2n tay, khu\u00f4n m\u1eb7t ho\u1eb7c gi\u1ecdng n\u00f3i<\/strong><\/p>\n\n\n\n

C\u00e1ch \u0111\u00e2y kh\u00f4ng l\u00e2u, \u0111\u1ed1i v\u1edbi h\u1ea7u h\u1ebft m\u1ecdi ng\u01b0\u1eddi, x\u00e1c th\u1ef1c sinh tr\u1eafc h\u1ecdc l\u00e0 m\u1ed9t \u0111i\u1ec1u g\u00ec \u0111\u00f3 xa l\u1ea1. Tuy nhi\u00ean, m\u1ecdi th\u1ee9 \u0111\u00e3 thay \u0111\u1ed5i kh\u00e1 nhanh: h\u1ea7u h\u1ebft \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh hi\u1ec7n nay \u0111\u1ec1u c\u00f3 kh\u1ea3 n\u0103ng x\u00e1c th\u1ef1c b\u1eb1ng nh\u1eadn d\u1ea1ng v\u00e2n tay ho\u1eb7c khu\u00f4n m\u1eb7t v\u00e0 \u0111i\u1ec1u \u0111\u00f3 kh\u00f4ng c\u00f3 g\u00ec \u0111\u00e1ng ng\u1ea1c nhi\u00ean.<\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n

X\u00e1c th\u1ef1c sinh tr\u1eafc h\u1ecdc c\u00f3 m\u1ed9t s\u1ed1 nh\u01b0\u1ee3c \u0111i\u1ec3m nghi\u00eam tr\u1ecdng. \u0110\u1ea7u ti\u00ean: t\u1ea5t c\u1ea3 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m m\u00e0 n\u00f3 d\u1ef1a v\u00e0o \u0111\u1ec1u l\u00e0 thu\u1ed9c t\u00ednh c\u1ed1 \u0111\u1ecbnh c\u1ee7a ng\u01b0\u1eddi d\u00f9ng. B\u1ea1n c\u00f3 th\u1ec3 thay \u0111\u1ed5i m\u1eadt kh\u1ea9u b\u1ecb l\u1ed9 th\u1eadm ch\u00ed b\u1ea1n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n nhi\u1ec1u l\u1ea7n v\u00ec l\u00fd do an to\u00e0n. Nh\u01b0ng d\u1ea5u v\u00e2n tay \u0111\u00e3 \u0111\u0103ng k\u00fd ch\u1ec9 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c thay \u0111\u1ed5i trong m\u1ed9t s\u1ed1 l\u1ea7n gi\u1edbi h\u1ea1n s\u1ed1 l\u1ea7n th\u1eed theo \u0111\u00fang ngh\u0129a \u0111en c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1ebfm tr\u00ean \u0111\u1ea7u ng\u00f3n tay c\u1ee7a hai b\u00e0n tay.<\/p>\n\n\n\n

V\u1ea5n \u0111\u1ec1 quan tr\u1ecdng th\u1ee9 hai bao g\u1ed3m th\u1ef1c t\u1ebf l\u00e0 d\u1eef li\u1ec7u sinh tr\u1eafc h\u1ecdc c\u1ef1c k\u1ef3 nh\u1ea1y c\u1ea3m v\u00ec kh\u00f4ng th\u1ec3 thay \u0111\u1ed5i v\u00e0 v\u00ec n\u00f3 kh\u00f4ng ch\u1ec9 cho ph\u00e9p x\u00e1c th\u1ef1c ng\u01b0\u1eddi d\u00f9ng m\u00e0 c\u00f2n cho ph\u00e9p nh\u1eadn d\u1ea1ng m\u1ed9t ng\u01b0\u1eddi. V\u00ec v\u1eady, vi\u1ec7c thu th\u1eadp v\u00e0 chuy\u1ec3n d\u1eef li\u1ec7u n\u00e0y sang c\u00e1c d\u1ecbch v\u1ee5 k\u1ef9 thu\u1eadt s\u1ed1 c\u1ea7n ph\u1ea3i h\u1ebft s\u1ee9c th\u1eadn tr\u1ecdng.<\/p>\n\n\n\n

\u0110\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao d\u1eef li\u1ec7u sinh tr\u1eafc h\u1ecdc th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c th\u1ef1c c\u1ee5c b\u1ed9: \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef v\u00e0 x\u1eed l\u00fd tr\u00ean thi\u1ebft b\u1ecb \u0111\u1ec3 tr\u00e1nh truy\u1ec1n \u0111i b\u1ea5t c\u1ee9 \u0111\u00e2u. \u0110\u1ec3 x\u00e1c th\u1ef1c sinh tr\u1eafc h\u1ecdc t\u1eeb xa, d\u1ecbch v\u1ee5 k\u1ef9 thu\u1eadt s\u1ed1 s\u1ebd ph\u1ea3i tin t\u01b0\u1edfng v\u00e0o nh\u00e0 cung c\u1ea5p thi\u1ebft b\u1ecb, \u0111i\u1ec1u m\u00e0 c\u00e1c d\u1ecbch v\u1ee5 th\u01b0\u1eddng kh\u00f4ng mu\u1ed1n l\u00e0m. <\/p>\n\n\n\n

5. V\u1ecb tr\u00ed<\/strong><\/p>\n\n\n\n

M\u1ed9t lo\u1ea1i x\u00e1c th\u1ef1c ng\u01b0\u1eddi d\u00f9ng n\u1eefa l\u00e0 v\u1ecb tr\u00ed. B\u1ea1n kh\u00f4ng c\u1ea7n ph\u1ea3i k\u00edch ho\u1ea1t ph\u01b0\u01a1ng ph\u00e1p n\u00e0y: n\u00f3 \u0111\u01b0\u1ee3c b\u1eadt theo m\u1eb7c \u0111\u1ecbnh. \u0110\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao n\u00f3 th\u01b0\u1eddng kh\u00f4ng \u0111\u01b0\u1ee3c ch\u00fa \u00fd v\u00e0 ng\u01b0\u1eddi d\u00f9ng ch\u1ec9 \u0111\u01b0\u1ee3c c\u1ea3nh b\u00e1o n\u1ebfu kh\u00f4ng th\u00e0nh c\u00f4ng: t\u1ee9c l\u00e0 n\u1ebfu n\u1ed7 l\u1ef1c \u0111\u0103ng nh\u1eadp \u0111\u1ebfn t\u1eeb m\u1ed9t v\u1ecb tr\u00ed m\u00e0 d\u1ecbch v\u1ee5 kh\u00f4ng mong \u0111\u1ee3i. Trong tr\u01b0\u1eddng h\u1ee3p \u0111\u00f3, d\u1ecbch v\u1ee5 c\u00f3 th\u1ec3 y\u00eau c\u1ea7u s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p x\u00e1c minh b\u1ed5 sung.<\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n

T\u1ea5t nhi\u00ean, v\u1ecb tr\u00ed kh\u00f4ng ph\u1ea3i l\u00e0 y\u1ebfu t\u1ed1 x\u00e1c th\u1ef1c \u0111\u00e1ng tin c\u1eady. Th\u1ee9 nh\u1ea5t, n\u00f3 kh\u00f4ng \u0111\u1eb7c bi\u1ec7t l\u1eafm: r\u1ea5t nhi\u1ec1u ng\u01b0\u1eddi kh\u00e1c c\u00f3 th\u1ec3 \u1edf c\u00f9ng m\u1ed9t n\u01a1i v\u00e0o b\u1ea5t k\u1ef3 th\u1eddi \u0111i\u1ec3m n\u00e0o. Th\u1ee9 hai, n\u00f3 kh\u00e1 d\u1ec5 thao t\u00e1c, \u0111\u1eb7c bi\u1ec7t l\u00e0 khi n\u00f3i v\u1ec1 v\u1ecb tr\u00ed d\u1ef1a tr\u00ean IP kh\u00f4ng ph\u1ea3i l\u00e0 \u0111\u1ecbnh v\u1ecb \u0111\u1ecba l\u00fd GPS th\u00edch h\u1ee3p. Tuy nhi\u00ean, v\u1ecb tr\u00ed c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 x\u00e1c th\u1ef1c v\u00e0 nhi\u1ec1u d\u1ecbch v\u1ee5 th\u1ef1c hi\u1ec7n \u0111i\u1ec1u \u0111\u00f3.<\/p>\n\n\n\n

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2FA \u0111\u00f3 l\u00e0 m\u1ed9t c\u01a1 ch\u1ebf x\u00e1c th\u1ef1c quy\u1ec1n truy c\u1eadp d\u1ef1a tr\u00ean hai ph\u01b0\u01a1ng th\u1ee9c x\u00e1c th\u1ef1c c\u01a1 b\u1ea3n kh\u00e1c nhau. 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