{"id":16207,"date":"2021-05-16T17:48:24","date_gmt":"2021-05-16T10:48:24","guid":{"rendered":"https:\/\/blog.tinohost.com\/?p=8967"},"modified":"2021-11-22T18:07:40","modified_gmt":"2021-11-22T11:07:40","slug":"captcha-la-gi","status":"publish","type":"post","link":"https:\/\/tino.vn\/blog\/captcha-la-gi\/","title":{"rendered":"Captcha l\u00e0 g\u00ec? T\u1ea1i sao Website c\u1ea7n c\u00f3 Captcha?"},"content":{"rendered":"\n

Khi \u0111\u0103ng nh\u1eadp hay truy c\u1eadp v\u00e0o website, b\u1ea1n \u0111\u1ec1u b\u1eaft g\u1eb7p h\u00ecnh \u1ea3nh Captcha nhi\u1ec1u l\u1ea7n v\u00e0 th\u01b0\u1eddng th\u1ea5y phi\u1ec1n ph\u1ee9c v\u1edbi n\u00f3. Li\u1ec7u s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a Captcha c\u00f3 c\u1ea7n thi\u1ebft? Nh\u1eefng d\u00f2ng ch\u1eef v\u00e0 c\u00e1c d\u00e3y s\u1ed1 xi\u00eau v\u1eb9o, kh\u00f3 nh\u00ecn \u0111\u00f3 ra \u0111\u1eddi nh\u1eb1m m\u1ee5c \u0111\u00edch g\u00ec? <\/strong><\/p>\n\n\n

<\/a>Captcha l\u00e0 g\u00ec? <\/strong><\/h2>\n\n\n

Trong th\u1eddi \u0111\u1ea1i c\u00f4ng ngh\u1ec7 th\u00f4ng tin ph\u00e1t tri\u1ec3n v\u01b0\u1ee3t b\u1eadc nh\u01b0 hi\u1ec7n nay, m\u1ecdi ng\u01b0\u1eddi c\u00e0ng c\u00f3 nhi\u1ec1u c\u01a1 h\u1ed9i ti\u1ebfp x\u00fac v\u1edbi c\u00e1c thu\u1eadt ng\u1eef c\u1ee7a l\u0129nh v\u1ef1c c\u00f4ng ngh\u1ec7. Captcha l\u00e0 m\u1ed9t v\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh. D\u00f9 c\u00f3 c\u01a1 h\u1ed9i ti\u1ebfp x\u00fac nhi\u1ec1u nh\u01b0ng ch\u01b0a ch\u1eafc b\u1ea1n \u0111\u00e3 hi\u1ec3u \u0111\u00fang v\u1ec1 thu\u1eadt ng\u1eef n\u00e0y.<\/p>\n\n\n

Captcha l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a c\u1ee5m t\u1eeb Ti\u1ebfng Anh “Completely Automated Public Turing test to tell Computers and Humans Apart”<\/strong>, t\u1ea1m d\u1ecbch: Ph\u00e9p th\u1eed Turing c\u00f4ng c\u1ed9ng<\/em>. \u0110\u00e2y m\u1ed9t b\u00e0i ki\u1ec3m tra kh\u1ea3 n\u0103ng tr\u00ed tu\u1ec7 c\u1ee7a m\u00e1y t\u00ednh, ho\u00e0n to\u00e0n t\u1ef1 \u0111\u1ed9ng \u0111\u1ec3 ph\u00e2n bi\u1ec7t m\u00e1y t\u00ednh v\u1edbi con ng\u01b0\u1eddi. <\/p>\n\n\n

<\/p>\n\n\n

\"captcha-la-gi\"<\/figure><\/div>\n\n\n

Captcha l\u00e0 h\u00ecnh \u1ea3nh ch\u1ee9a m\u1ed9t \u0111o\u1ea1n t\u1eeb m\u00e3, c\u00f3 th\u1ec3 g\u1ed3m 5 ch\u1eef, s\u1ed1 li\u1ec1n k\u1ec1 hay m\u1ed9t c\u1ee5m t\u1eeb n\u00e0o \u0111\u00f3, ki\u1ec3u d\u00e1ng v\u00e0 v\u1ecb tr\u00ed s\u1eafp x\u1ebfp kh\u00f4ng theo h\u00e0ng l\u1ed1i, c\u1ed1 t\u00ecnh l\u00e0m m\u00e9o m\u00f3 \u0111\u1ec3 kh\u00f3 \u0111\u1ecdc h\u01a1n. \u0110\u00e2y th\u1ef1c ch\u1ea5t l\u00e0 m\u1ed9t m\u00e3 ki\u1ec3m tra nh\u1eb1m x\u00e1c \u0111\u1ecbnh ng\u01b0\u1eddi d\u00f9ng l\u00e0 ng\u01b0\u1eddi th\u1ef1c hay m\u00e1y t\u00ednh spam. <\/p>\n\n\n

<\/a>L\u1ecbch s\u1eed h\u00ecnh th\u00e0nh c\u1ee7a Captcha <\/strong><\/h3>\n\n\n

Thu\u1eadt ng\u1eef Captcha l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c xu\u1ea5t hi\u1ec7n v\u00e0o n\u0103m 2000. \u0110\u00e2y l\u00e0 k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u c\u1ee7a nh\u00f3m t\u00e1c gi\u1ea3 g\u1ed3m Luis von Ahn, Manuel Blum, Nicholas j.Hopper (tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc Carnegie Mellon) v\u00e0 John Langford (thu\u1ed9c IBM).<\/p>\n\n\n

<\/a>B\u1ea1n c\u00f3 th\u1ec3 l\u00e0m g\u00ec v\u1edbi Captcha? <\/strong><\/h3>\n\n\n

M\u00e1y m\u00f3c c\u00f3 th\u1ec3 suy ngh\u0129 nh\u01b0 con ng\u01b0\u1eddi kh\u00f4ng? <\/p>\n\n\n

Captcha l\u00e0 m\u1ed9t ph\u1ea7n m\u1ec1m th\u00f4ng minh \u0111\u1ea1i di\u1ec7n cho nh\u1eefng \u0111\u1ed5i m\u1edbi trong l\u0129nh v\u1ef1c c\u00f4ng ngh\u1ec7. Kh\u00f4ng c\u00f3 b\u1ea5t k\u1ef3 m\u00e1y t\u00ednh hay ph\u1ea7n m\u1ec1m n\u00e0o c\u00f3 th\u1ec3 gi\u1ea3i \u0111\u01b0\u1ee3c tr\u1ecdn v\u1eb9n, ch\u00ednh x\u00e1c thu\u1eadt to\u00e1n c\u1ee7a Captcha. D\u00f9 th\u1ebf n\u00e0o th\u00ec ch\u1ec9 c\u00f3 con ng\u01b0\u1eddi m\u1edbi th\u1eadt s\u1ef1 \u0111\u1ecdc hi\u1ec3u ch\u00ednh x\u00e1c Captcha. \u0110i\u1ec1u n\u00e0y \u0111\u00e3 minh ch\u1ee9ng cho s\u1ef1 ra \u0111\u1eddi th\u00e0nh c\u00f4ng c\u1ee7a Captcha. <\/p>\n\n\n

\"captcha-la-gi\"
Captcha l\u00e0 g\u00ec? B\u1ea1n c\u00f3 th\u1ec3 l\u00e0m g\u00ec v\u1edbi Captcha?\n<\/figcaption><\/figure><\/div>\n\n\n

\n M\u1ed9t Captcha th\u01b0\u1eddng bao g\u1ed3m c\u00e1c k\u00fd t\u1ef1, d\u00e3y s\u1ed1 m\u00e9o m\u00f3, m\u1edd v\u1edbi v\u1ecb tr\u00ed s\u1eafp x\u1ebfp r\u1ea5t kh\u00f3 nh\u00ecn. Y\u00eau c\u1ea7u c\u1ee7a Captcha l\u00e0 ng\u01b0\u1eddi d\u00f9ng ph\u1ea3i nh\u1eadp l\u1ea1i th\u1eadt tr\u00f9ng kh\u1edbp, ch\u00ednh x\u00e1c \u0111\u1ebfn t\u1eebng chi ti\u1ebft.\n<\/p>\n\n\n

<\/a>T\u1ea1i sao Captcha l\u1ea1i kh\u00f3 \u0111\u1ecdc \u0111\u1ebfn th\u1ebf?<\/strong> <\/h3>\n\n\n

\n Captcha ra \u0111\u1eddi nh\u1eb1m ph\u00e2n bi\u1ec7t con ng\u01b0\u1eddi v\u1edbi m\u00e1y m\u00f3c. N\u1ebfu Captcha qu\u00e1 d\u1ec5 \u0111\u1ec3 b\u1ea1n \u0111\u1ecdc ra ch\u1ec9 trong 1 \u0111\u1ebfn 2 gi\u00e2y th\u00ec m\u00e1y t\u00ednh c\u0169ng c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c. B\u1edfi m\u00e1y t\u00ednh s\u1edf h\u1eefu tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o \u0111\u1ec9nh cao, n\u00f3 c\u00f3 th\u1ec3 scan m\u1eabu Captcha v\u00e0 \u0111o\u00e1n \u0111\u00fang \u0111\u01b0\u1ee3c c\u00e1c ch\u1eef c\u00e1i, con s\u1ed1 b\u00ean trong \u1ea3nh d\u1ec5 d\u00e0ng. Ch\u00ednh v\u00ec th\u1ebf c\u1ea7n l\u01b0u \u00fd r\u1eb1ng, m\u1ed9t Captcha d\u1ec5 \u0111\u1ecdc s\u1ebd \u0111\u1ee1 phi\u1ec1n ph\u1ee9c cho b\u1ea1n nh\u01b0ng c\u0169ng l\u00e0 m\u1eb7t thu\u1eadn l\u1ee3i \u0111\u1ec3 ch\u01b0\u01a1ng tr\u00ecnh m\u00e1y t\u00ednh d\u1ec5 d\u00e0ng nh\u1eadn di\u1ec7n v\u00e0 truy c\u1eadp v\u00e0o h\u1ec7 th\u1ed1ng. \u0110\u00f3 ch\u00ednh l\u00e0 ch\u1ee7 \u0111\u00edch m\u00e0 nh\u1eefng ng\u01b0\u1eddi t\u1ea1o ra Captcha mu\u1ed1n ng\u0103n ch\u1eb7n ngay b\u01b0\u1edbc \u0111\u1ea7u l\u1eadp tr\u00ecnh.\n<\/p>\n\n\n

<\/a>Ph\u01b0\u01a1ng th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Captcha <\/strong><\/h2>\n\n\n

\n D\u1ef1a tr\u00ean nguy\u00ean l\u00fd c\u01a1 b\u1ea3n, Captcha ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c quy t\u1eafc v\u1ec1 ng\u00f4n ng\u1eef, ti\u1ebfng l\u00f3ng c\u1ee7a con ng\u01b0\u1eddi. \u0110\u00e2y l\u00e0 nh\u1eefng \u0111i\u1ec1u m\u00e1y t\u00ednh v\u00e0 Internet kh\u00f4ng th\u1ec3 hi\u1ec3u v\u00e0 nh\u1eadn d\u1ea1ng \u0111\u01b0\u1ee3c.\n<\/p>\n\n\n

\n Nh\u1edd \u0111\u00f3, Captcha c\u00f3 th\u1ec3 gi\u00fap ph\u00e2n bi\u1ec7t m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c gi\u1eefa con ng\u01b0\u1eddi v\u1edbi m\u00e1y m\u00f3c. H\u01a1n n\u1eefa, Captcha c\u00f2n gi\u00fap ng\u0103n ch\u1eb7n ph\u1ea7n m\u1ec1m \u0111\u1ed9c h\u1ea1i, Robot \u0111\u01b0\u1ee3c l\u1eadp tr\u00ecnh s\u1eb5n t\u1ea5n c\u00f4ng v\u00e0o h\u1ec7 th\u1ed1ng \u0111\u1ec3 b\u1ea3o m\u1eadt trang Web t\u1ed1t h\u01a1n. Khi c\u00e1c x\u00e2m ph\u1ea1m b\u1ea5t h\u1ee3p ph\u00e1p mu\u1ed1n t\u1ea5n c\u00f4ng, n\u00f3 \u0111\u1ec1u ph\u1ea3i d\u1eebng l\u1ea1i v\u00e0 tr\u1ea3i qua b\u01b0\u1edbc x\u00e1c minh Captcha.\n<\/p>\n\n\n

\"captcha-la-gi\"
C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Captcha\n<\/figcaption><\/figure><\/div>\n\n\n

\n Con ng\u01b0\u1eddi c\u00f3 kh\u1ea3 n\u0103ng gi\u1ea3i m\u00e3 Captcha ch\u00ednh x\u00e1c l\u00ean t\u1edbi 80%. Trong khi \u0111\u00f3, c\u00f9ng m\u1ed9t m\u00e3 nh\u01b0ng kh\u1ea3 n\u0103ng c\u1ee7a m\u00e1y t\u00ednh v\u00e0 Robot l\u1eadp tr\u00ecnh s\u1eb5n r\u01a1i \u1edf m\u1ee9c c\u1ef1c th\u1ea5p, kho\u1ea3ng 0,1%.\n<\/p>\n\n\n

<\/a>T\u1ea1i sao Website c\u1ea7n c\u00f3 Captcha? <\/strong><\/h2>\n\n\n

S\u1edf h\u1eefu nh\u1eefng \u01b0u \u0111i\u1ec3m v\u01b0\u1ee3t tr\u1ed9i, Captcha l\u00e0 ph\u01b0\u01a1ng th\u1ee9c b\u1ea3o v\u1ec7 Website \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn. \u0110\u1ed1i v\u1edbi nh\u1eefng k\u00eanh s\u1edf h\u1eefu l\u01b0\u1ee3ng l\u1edbn d\u1eef li\u1ec7u, b\u1ea1n c\u00e0ng ph\u1ea3i b\u1ea3o v\u1ec7 ch\u1eb7t ch\u1ebd. V\u00e0 Captcha xu\u1ea5t hi\u1ec7n, tr\u1edf th\u00e0nh m\u1ed9t y\u1ebfu t\u1ed1 t\u1ea5t y\u1ebfu h\u1ed7 tr\u1ee3 b\u1ea1n trong h\u00e0nh tr\u00ecnh x\u00e2y d\u1ef1ng v\u00e0 \u0111i\u1ec1u h\u00e0nh Website c\u1ee7a m\u00ecnh. <\/p>\n\n\n

<\/em> <\/p>\n\n\n

\"captcha-la-gi\"
Captcha mang \u0111\u1ebfn nhi\u1ec1u t\u00ednh n\u0103ng b\u1ea3o m\u1eadt cho Website\n<\/figcaption><\/figure><\/div>\n\n\n

\n S\u1eed d\u1ee5ng Website l\u00e0m k\u00eanh truy\u1ec1n th\u00f4ng, qu\u1ea3ng b\u00e1 s\u1ea3n ph\u1ea9m, d\u1ecbch v\u1ee5 hi\u1ec7n nay r\u1ea5t ph\u00e1t tri\u1ec3n. Tuy nhi\u00ean, b\u1ea1n c\u1ea7n x\u00e1c \u0111\u1ecbnh r\u00f5 l\u01b0\u1ee3ng t\u01b0\u01a1ng t\u00e1c v\u1edbi Website c\u1ee7a m\u00ecnh l\u00e0 con ng\u01b0\u1eddi, c\u1ed7 m\u00e1y hay Robot. Nh\u1eefng b\u1ea5t c\u1eadp n\u00e0y tr\u1edf n\u00ean d\u1ec5 d\u00e0ng khi c\u00f3 Captcha. Captcha gi\u00fap b\u1ea1n duy tr\u00ec l\u01b0\u1ee3ng t\u01b0\u01a1ng t\u00e1c ch\u1ea5t l\u01b0\u1ee3ng trong Website. \u0110\u00e2y l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p c\u1ee9u c\u00e1nh, gi\u00fap b\u1ea1n lu\u00f4n ch\u1eafc ch\u1eafn \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1ch h\u00e0ng ti\u1ec1m n\u0103ng c\u1ee7a m\u00ecnh l\u00e0 ng\u01b0\u1eddi th\u1eadt.\n<\/p>\n\n\n

Captcha c\u00f2n h\u1ed7 tr\u1ee3 Website c\u1ee7a b\u1ea1n lo\u1ea1i b\u1ecf nh\u1eefng ph\u1ea7n t\u1eed \u0111\u1ed9c h\u1ea1i<\/a>. T\u1eeb \u0111\u00f3 b\u1ea1n d\u1ec5 d\u00e0ng qu\u1ea3n l\u00fd, x\u00e2y d\u1ef1ng m\u1ed9t n\u1ec1n t\u1ea3ng kinh doanh hi\u1ec7u qu\u1ea3. <\/p>\n\n\n

\n Ng\u0103n ch\u1eb7n h\u00e0nh \u0111\u1ed9ng Spam, t\u1ef1 \u0111\u1ed9ng \u0111\u0103ng b\u00e0i tr\u00ean c\u00e1c di\u1ec5n \u0111\u00e0n, trang Web d\u1ec5 d\u00e0ng khi c\u00f3 Captcha. L\u00fac n\u00e0y, ng\u01b0\u1eddi qu\u1ea3n l\u00fd di\u1ec5n \u0111\u00e0n kh\u00f4ng ph\u1ea3i \u0111au \u0111\u1ea7u x\u1eed l\u00fd t\u00ecnh tr\u1ea1ng spam h\u00e0ng lo\u1ea1t nh\u1eefng t\u00e0i kho\u1ea3n t\u1ef1 \u0111\u1ed9ng.\n<\/p>\n\n\n

<\/a>C\u00e1ch gi\u1eef m\u00e3 Captcha an to\u00e0n cho Website<\/strong><\/h2>\n\n\n

\n B\u1ea5t k\u1ef3 lo\u1ea1i Captcha n\u00e0o c\u0169ng \u0111\u1ec1u \u0111\u1ea3m b\u1ea3o s\u1ef1 an to\u00e0n nh\u1ea5t \u0111\u1ecbnh cho Website. Tuy nhi\u00ean, b\u1ea1n kh\u00f4ng n\u00ean ch\u1ee7 quan, c\u1ea7n l\u01b0u \u00fd \u0111\u1ebfn m\u00e3 Captcha \u1edf nh\u1eefng \u0111i\u1ec3m nh\u01b0 sau:\n<\/p>\n\n\n

<\/a>S\u1eed d\u1ee5ng h\u00ecnh \u1ea3nh an to\u00e0n m\u00e0 kh\u00e1c bi\u1ec7t <\/strong><\/h3>\n\n\n

\n Thay v\u00ec ch\u1ecdn c\u00e1c h\u00ecnh \u1ea3nh v\u1edbi k\u00edch th\u01b0\u1edbc nh\u1ecf, \u0111\u01a1n gi\u1ea3n, b\u1ea1n n\u00ean \u01b0u ti\u00ean ch\u1ecdn nh\u1eefng h\u00ecnh \u1ea3nh v\u1edbi ki\u1ec3u d\u00e1ng m\u00e9o m\u00f3. Nh\u1edd \u0111\u00f3 h\u1ec7 th\u1ed1ng m\u00e1y m\u00f3c s\u1ebd kh\u00f3 \u0111\u1ec3 t\u1ea5n c\u00f4ng t\u1ef1 \u0111\u1ed9ng, b\u1ea3o v\u1ec7 Web t\u1ed1t h\u01a1n.\n<\/p>\n\n\n

<\/a>Ch\u1ecdn Captcha ri\u00eang<\/strong><\/h3>\n\n\n

\n Nh\u1eefng g\u00ec qu\u00e1 c\u01a1 b\u1ea3n, th\u00e2n quen s\u1ebd r\u1ea5t d\u1ec5 \u0111o\u00e1n ra \u0111\u01b0\u1ee3c. B\u1ea1n n\u00ean ch\u1ecdn nh\u1eefng m\u1eabu Captcha m\u1edbi l\u1ea1, \u0111\u1ed9c \u0111\u00e1o, \u00edt ng\u01b0\u1eddi d\u00f9ng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 b\u1ea3o m\u1eadt t\u1ed1t.\n<\/p>\n\n\n

<\/a>T\u1ec7p l\u1ec7nh c\u1ea7n \u0111\u01b0\u1ee3c b\u1ea3o m\u1eadt<\/strong><\/h3>\n\n\n

\n B\u1ea1n kh\u00f4ng n\u00ean s\u1eed d\u1ee5ng Scripts t\u1eeb Internet, v\u00ec s\u1ef1 ph\u1ed5 bi\u1ebfn c\u1ee7a n\u00f3 r\u1ea5t d\u1ec5 b\u1ecb t\u1ea5n c\u00f4ng. V\u00ec th\u1ebf, b\u1ea1n n\u00ean d\u00f9ng h\u1ec7 th\u1ed1ng chuy\u1ec3n \u0111\u00e1p \u00e1n c\u1ee7a Captcha d\u01b0\u1edbi d\u1ea1ng v\u0103n b\u1ea3n thu\u1ea7n t\u00fay.\n<\/p>\n\n\n

<\/a>\u0110a d\u1ea1ng kh\u1ea3 n\u0103ng truy c\u1eadp<\/strong><\/h3>\n\n\n

\n Captcha c\u1ea7n truy c\u1eadp b\u1edfi con ng\u01b0\u1eddi qua nhi\u1ec1u h\u00ecnh th\u1ee9c nh\u01b0 h\u00ecnh \u1ea3nh, \u00e2m thanh, v\u0103n b\u1ea3n.\n<\/p>\n\n\n

<\/a>B\u1ea1n ngh\u0129 g\u00ec khi reCaptcha xu\u1ea5t hi\u1ec7n? <\/strong><\/h2>\n\n\n

\n Trong nh\u1eefng c\u00e1ch b\u1ea3o m\u1eadt hi\u1ec7n c\u00f3 tr\u00ean Internet, Captcha l\u00e0 m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 cao v\u00e0 s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn. Tuy nhi\u00ean, Luis von Ahn – m\u1ed9t trong nh\u1eefng ng\u01b0\u1eddi s\u00e1ng l\u1eadp Captcha nh\u1eadn th\u1ea5y nh\u1eefng b\u1ea5t ti\u1ec7n, ti\u00eau t\u1ed1n qu\u00e1 nhi\u1ec1u th\u1eddi gian c\u1ee7a con ng\u01b0\u1eddi \u0111\u1ec3 gi\u1ea3i m\u00e3 nh\u1eefng c\u00e2u \u0111\u1ed1 c\u1ee7a Captcha. T\u1eeb \u0111\u00f3, Luis von Ahn \u0111\u00e3 cho ra \u0111\u1eddi reCaptcha ph\u00e1t tri\u1ec3n t\u1eeb phi\u00ean b\u1ea3n g\u1ed1c Captcha.\n<\/p>\n\n\n

\"captcha-la-gi\"
reCaptcha, phi\u00ean b\u1ea3n n\u00e2ng c\u1ea5p t\u1eeb Captcha truy\u1ec1n th\u1ed1ng\n<\/figcaption><\/figure><\/div>\n\n\n

Hi\u1ec7n nay, reCaptcha c\u1ee7a Google c\u00f3 nh\u1eefng b\u01b0\u1edbc ti\u1ebfn l\u1edbn, thay th\u1ebf, kh\u1eafc ph\u1ee5c nh\u1eefng h\u1ea1n ch\u1ebf c\u1ee7a h\u00ecnh th\u1ee9c Captcha c\u1ed5 \u0111i\u1ec3n. \u0110\u01b0\u01a1ng nhi\u00ean ch\u00fang ta c\u0169ng c\u00f3 th\u1ec3 k\u1ef3 v\u1ecdng v\u00e0o nh\u1eefng b\u01b0\u1edbc ti\u1ebfn xa h\u01a1n c\u1ee7a Captcha trong t\u01b0\u01a1ng lai s\u1ebd mang \u0111\u1ebfn nhi\u1ec1u h\u1eefu \u00edch cho con ng\u01b0\u1eddi, t\u0103ng t\u00ednh b\u1ea3o m\u1eadt t\u1ed1t h\u01a1n. <\/p>\n\n\n

reCaptcha ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch l\u1ea5y nh\u1eefng t\u1eeb kh\u00f4ng th\u1ec3 nh\u1eadn ra trong qu\u00e1 tr\u00ecnh qu\u00e9t v\u00e0 \u0111\u01b0a ch\u00fang cho ng\u01b0\u1eddi d\u00f9ng. Sau \u0111\u00f3 \u0111\u1eb7t b\u00ean c\u1ea1nh m\u1ed9t t\u1eeb \u0111\u00e3 bi\u1ebft \u0111\u1ec3 ng\u01b0\u1eddi d\u00f9ng d\u1ec5 d\u00e0ng gi\u1ea3i ngh\u0129a. Khi nh\u1eadp ch\u00ednh x\u00e1c t\u1eeb \u0111\u00e3 bi\u1ebft, b\u1ea1n s\u1ebd \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn l\u00e0 con ng\u01b0\u1eddi. H\u1ec7 th\u1ed1ng tin r\u1eb1ng b\u1ea1n \u0111\u00e3 s\u1ed1 h\u00f3a ch\u00ednh x\u00e1c t\u1eeb th\u1ee9 hai. \u1ede 10 ng\u01b0\u1eddi kh\u00e1c c\u0169ng c\u00f3 \u0111\u00e1p \u00e1n gi\u1ed1ng b\u1ea1n v\u1ec1 t\u1eeb ch\u01b0a bi\u1ebft, h\u1ec7 th\u1ed1ng s\u1ebd k\u1ebft lu\u1eadn r\u1eb1ng b\u1ea1n nh\u1eadp ch\u00ednh x\u00e1c v\u00e0 cho ph\u00e9p truy c\u1eadp. <\/p>\n\n\n

Ch\u00fac b\u1ea1n “l\u00e0m vi\u1ec7c” t\u1ed1t v\u00e0 khai th\u00e1c t\u1ed1i \u0111a hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng c\u1ee7a Captcha nh\u00e9!<\/p>\n\n\n

<\/a>FAQs v\u1ec1 Captcha <\/strong><\/h2>\n\n\t\t\n\t\t\t\t

Captcha c\u00f3 d\u1ec5 "qua m\u1eb7t" hay kh\u00f4ng?<\/h2>\t\t\t\t
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\n C\u00e2u tr\u1ea3 l\u1eddi: Kh\u00f4ng.\n<\/p>\n\n\n

\n Captcha \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng v\u1edbi t\u00ednh n\u0103ng b\u1ea3o m\u1eadt v\u00f4 c\u00f9ng ch\u1eafc ch\u1eafn. Nh\u1eefng ng\u01b0\u1eddi \u1edf tr\u00ecnh \u0111\u1ed9 ph\u1ed5 th\u00f4ng r\u1ea5t kh\u00f3 \u0111\u1ec3 \u0111\u0103ng nh\u1eadp, ph\u00e1 v\u1ee1 h\u00e0ng r\u00e0o Captcha \u0111\u1ec3 truy c\u1eadp v\u00e0o Website. Tuy nhi\u00ean \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 x\u1ea3y ra \u0111\u1ed1i v\u1edbi c\u00e1c l\u1eadp tr\u00ecnh vi\u00ean chuy\u00ean nghi\u1ec7p, nh\u1eefng hacker \u0111\u1ec9nh cao.\n<\/p>\n\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\n\t\t\t\t

Website n\u00e0o n\u00ean \u0111\u0103ng k\u00fd Captcha? <\/h2>\t\t\t\t
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\n Nh\u1eefng Website n\u00ean \u0111\u0103ng k\u00fd Captcha \u0111\u00f3 l\u00e0:\n<\/p>\n\n\n

  • \n Website kinh doanh th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed\n <\/li>
  • \n Website b\u00e1n h\u00e0ng\n <\/li>
  • \n Ch\u1ea1y ch\u01b0\u01a1ng tr\u00ecnh kh\u1ea3o s\u00e1t\n <\/li>
  • \n H\u1ec7 th\u1ed1ng Website \u0111\u0103ng k\u00fd l\u1edbn c\u1ee7a ng\u00e0nh c\u00f4ng ngh\u1ec7 th\u00f4ng tin nh\u01b0 Gmail, Yahoo,…\n <\/li>
  • \n H\u1ec7 th\u1ed1ng b\u00ecnh lu\u1eadn, li\u00ean h\u1ec7\n <\/li><\/ul>\n\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\n\t\t\t\t

    Nh\u1eefng \u1ee9ng d\u1ee5ng c\u1ee7a Captcha ph\u1ed5 bi\u1ebfn tr\u00ean Website?<\/h2>\t\t\t\t
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    • X\u00e1c nh\u1eadn khi \u0111\u0103ng k\u00fd t\u00e0i kho\u1ea3n<\/li>
    • B\u1ea3o v\u1ec7 c\u00e1c cu\u1ed9c kh\u1ea3o s\u00e1t tr\u1ef1c tuy\u1ebfn<\/li>
    • Ng\u0103n ch\u1eb7n c\u00e1c t\u1ea5n c\u00f4ng nh\u01b0 DDOS<\/li>
    • An to\u00e0n b\u1ea3o m\u1eadt th\u00f4ng tin v\u00e0 d\u1eef li\u1ec7u<\/li>
    • Ch\u1ed1ng spam b\u00ecnh lu\u1eadn<\/li><\/ul>\n\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\n\t\t\t\t

      Plugin Google Captcha cho WordPress l\u00e0 g\u00ec?<\/h2>\t\t\t\t
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      \n Plugin Google Captcha \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p c\u00e1c h\u00ecnh th\u1ee9c Captcha nh\u01b0:\n<\/p>\n\n\n

      • \n reCaptcha Version 3\n <\/li>
      • \n reCaptcha Version 2\n <\/li>
      • \n no-Captcha\n <\/li><\/ul>\n\n\n

        Plugin Google Captcha l\u00e0 gi\u1ea3i ph\u00e1p \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng \u0111\u1ec3 b\u1ea3o m\u1eadt hi\u1ec7u qu\u1ea3 cho WordPress kh\u1ecfi nh\u1eefng Spam. B\u00ean c\u1ea1nh \u0111\u00f3 s\u1ebd t\u00edch h\u1ee3p, c\u1eadp nh\u1eadt li\u00ean t\u1ee5c nh\u1eefng c\u00f4ng ngh\u1ec7 m\u1edbi t\u1eeb Google Captcha. V\u00e0 n\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u0103ng k\u00fd, \u0111\u0103ng nh\u1eadp, kh\u00f4i ph\u1ee5c m\u1eadt kh\u1ea9u, b\u00ecnh lu\u1eadn, c\u00e1c h\u00ecnh th\u1ee9c li\u00ean l\u1ea1c kh\u00e1c,… <\/p>\n\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/section>\n\t\t\n