{"id":263,"date":"2018-11-27T02:59:01","date_gmt":"2018-11-27T02:59:01","guid":{"rendered":"https:\/\/sum.vn\/blog\/?p=263"},"modified":"2018-11-27T03:00:10","modified_gmt":"2018-11-27T03:00:10","slug":"captcha-la-gi-tai-sao-phai-nhap-captcha-cho-website","status":"publish","type":"post","link":"https:\/\/sum.vn\/blog\/captcha-la-gi-tai-sao-phai-nhap-captcha-cho-website\/","title":{"rendered":"Captcha l\u00e0 g\u00ec? T\u1ea1i sao ph\u1ea3i nh\u1eadp captcha cho website?"},"content":{"rendered":"<p id=\"aui_3_2_0_1114\">B\u1ea1n c\u00f3 \u0111\u1ec3 \u00fd r\u1eb1ng khi b\u1ea1n tham gia kh\u1ea3o s\u00e1t online ho\u1eb7c \u0111i\u1ec1n th\u00f4ng tin v\u00e0o form m\u1eabu \u0111\u0103ng k\u00fd n\u00e0o \u0111\u00f3, \u0111\u00f4i khi b\u1ea1n ph\u1ea3i l\u00e0m m\u1ed9t vi\u1ec7c kh\u00e1 l\u00e0 phi\u1ec1n v\u00e0 m\u1ea5t th\u1eddi gian: b\u1ea1n s\u1ebd \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u nh\u00ecn v\u00e0o m\u1ed9t h\u00ecnh nh\u1ecf bao g\u1ed3m c\u00e1c ch\u1eef c\u00e1i v\u00e0 con s\u1ed1 (th\u01b0\u1eddng th\u00ec ch\u00fang \u0111\u1ec1u m\u00e9o m\u00f3 v\u00e0 \u0111\u01b0\u1ee3c x\u1ebfp ch\u00e8n l\u00ean nhau nh\u1eb1m khi\u1ebfn cho b\u1ea1n kh\u00f3 nh\u1eadn d\u1ea1ng ch\u00fang h\u01a1n), v\u00e0 sau \u0111\u00f3 b\u1ea1n c\u1ea7n ph\u1ea3i \u0111\u00e1nh l\u1ea1i c\u00e1c ch\u1eef c\u00e1i v\u00e0 s\u1ed1 \u0111\u00f3 theo \u0111\u00fang th\u1ee9 t\u1ef1 xu\u1ea5t hi\u1ec7n v\u00e0o m\u1ed9t \u00f4 nh\u1ecf b\u00ean d\u01b0\u1edbi ho\u1eb7c b\u00ean c\u1ea1nh h\u00ecnh \u1ea3nh n\u00e0y.<\/p>\n<p>V\u1eady nh\u1eefng th\u1ee9 \u0111\u00f3 l\u00e0 g\u00ec? T\u1ea1i sao ng\u01b0\u1eddi ta l\u1ea1i ph\u1ea3i thi\u1ebft k\u1ebf nh\u1eefng ch\u1eef v\u00e0 s\u1ed1 \u0111\u00f3 m\u1ed9t c\u00e1ch xi\u00eau v\u1eb9o v\u00e0 kh\u00f3 nh\u00ecn \u0111\u1ebfn v\u1eady? M\u1ee5c \u0111\u00edch c\u1ee7a ch\u00fang l\u00e0 g\u00ec khi y\u00eau c\u1ea7u ch\u00fang ta ph\u1ea3i vi\u1ebft l\u1ea1i nh\u1eefng ch\u1eef v\u00e0 s\u1ed1 \u0111\u00f3 trong khi ai c\u0169ng c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y v\u00e0 c\u00f3 th\u1ec3 ph\u00e2n bi\u1ec7t nh\u1eefng ch\u1eef c\u00e1i n\u00e0y?<\/p>\n<h2>Captcha l\u00e0 g\u00ec?<\/h2>\n<p>Theo c\u00e1ch hi\u1ec3u chuy\u00ean m\u00f4n, CAPTCHA (vi\u1ebft t\u1eaft c\u1ee7a <strong>Completely Automated Public Turing test to tell Computers and Humans Apart\u2019<\/strong>\u00a0\u2013 Ph\u00e9p th\u1eed Turing c\u00f4ng c\u1ed9ng t\u1ef1 \u0111\u1ed9ng \u0111\u1ec3 ph\u00e2n bi\u1ec7t m\u00e1y t\u00ednh v\u1edbi ng\u01b0\u1eddi). Khi s\u1eed d\u1ee5ng m\u1ed9t h\u1ec7 th\u1ed1ng hay ph\u1ea7n m\u1ec1m c\u00f4ng ngh\u1ec7 b\u1ea5t k\u00ec, \u0111\u1ec3 tr\u00e1nh t\u00ecnh tr\u1ea1ng x\u00e2m nh\u1eadp b\u1ea5t h\u1ee3p ph\u00e1p ho\u1eb7c c\u00e1c truy c\u1eadp \u0111\u00e1ng ng\u1edd\u00a0t\u1eeb c\u00e1c h\u1ec7 th\u1ed1ng, ph\u1ea7n m\u1ec1m t\u1ef1 \u0111\u1ed9ng, ng\u01b0\u1eddi ta th\u01b0\u1eddng d\u00f9ng CAPTCHA \u0111\u1ec3 th\u1ef1c hi\u1ec7n \u0111i\u1ec1u n\u00e0y.<\/p>\n<p>Hay n\u00f3i m\u1ed9t c\u00e1ch d\u1ec5 hi\u1ec3u h\u01a1n, khi b\u1ea1n s\u1eed d\u1ee5ng c\u00e1c d\u1ecbch v\u1ee5 Internet, \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c t\u00e1c v\u1ee5 tr\u00ean website (th\u01b0\u1eddng l\u00e0 \u0111\u0103ng k\u00ed t\u00e0i kho\u1ea3n, g\u1eedi \u0111i m\u1ed9t b\u00e0i vi\u1ebft, x\u00e1c nh\u1eadn m\u1eadt kh\u1ea9u\u2026.), b\u1ea1n s\u1ebd nh\u1eadn \u0111\u01b0\u1ee3c th\u00f4ng b\u00e1o t\u1eeb h\u1ec7 th\u1ed1ng v\u1edbi n\u1ed9i dung y\u00eau c\u1ea7u x\u00e1c nh\u1eadn m\u00e3 Captcha. Trong \u0111\u00f3 m\u00e3 Captcha \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb d\u01b0\u1edbi d\u1ea1ng khung \u1ea3nh nh\u1ecf ch\u1ee9a c\u00e1c k\u00ed t\u1ef1 ch\u1eef ho\u1eb7c s\u1ed1, ho\u1eb7c c\u1ea3 hai. V\u00e0 th\u00f4ng th\u01b0\u1eddng, ch\u00fang \u0111\u1ec1u m\u00e9o m\u00f3 v\u00e0 \u0111\u01b0\u1ee3c x\u1ebfp ch\u00e8n l\u00ean nhau, ho\u1eb7c xen k\u1ebd nh\u1eb1m khi\u1ebfn cho b\u1ea1n kh\u00f3 nh\u1eadn d\u1ea1ng ch\u00fang h\u01a1n. Captcha c\u01a1 b\u1ea3n l\u00e0 m\u1ed9t b\u00e0i ki\u1ec3m tra v\u1ec1 m\u1ee9c \u0111\u1ed9 ch\u00ednh x\u00e1c trong ph\u1ea3n h\u1ed3i (bao g\u1ed3m m\u1ed9t b\u00ean \u0111\u1eb7t c\u00e2u h\u1ecfi v\u00e0 m\u1ed9t b\u00ean \u0111\u01b0a ra c\u00e2u tr\u1ea3 l\u1eddi h\u1ee3p l\u1ec7) nh\u1eb1m ph\u00e2n bi\u1ec7t ng\u01b0\u1eddi d\u00f9ng (\u0111\u1ed1i t\u01b0\u1ee3ng \u0111ang truy c\u1eadp v\u00e0o trang web) l\u00e0 con ng\u01b0\u1eddi hay robot.<\/p>\n<h2>Captcha ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<\/h2>\n<p>M\u1ee5c \u0111\u00edch c\u1ee7a vi\u1ec7c hi\u1ec3n th\u1ecb n\u00e0y l\u00e0 \u0111\u1ec3 ph\u00e2n bi\u1ec7t v\u00e0 x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c b\u1ea1n ch\u00ednh l\u00e0 ng\u01b0\u1eddi th\u1eadt ch\u1ee9 kh\u00f4ng ph\u1ea3i c\u00e1c ph\u1ea7n m\u1ec1m, malware \u0111\u1ed9c h\u1ea1i \u0111\u01b0\u1ee3c l\u1eadp tr\u00ecnh s\u1eb5n \u0111\u1ec3 \u0111\u0103ng nh\u1eadp v\u00e0o ph\u00e1 h\u1ec7 th\u1ed1ng. \u0110\u1ed1i v\u1edbi c\u00e1c malware y\u1ebfu ho\u1eb7c c\u00e1c truy c\u1eadp b\u1ea5t h\u1ee3p ph\u00e1p \u1edf m\u1ee9c y\u1ebfu, n\u00f3 th\u01b0\u1eddng b\u1ecb d\u1eebng l\u1ea1i \u1edf b\u01b0\u1edbc x\u00e1c nh\u1eadn Capcha v\u00ec kh\u00f4ng th\u1ec3 hi\u1ec3u hay nh\u1eadn di\u1ec7n c\u00e1c h\u00ecnh \u1ea3nh.<\/p>\n<p><img decoding=\"async\" class=\"size-full wp-image-264 aligncenter\" src=\"https:\/\/sum.vn\/blog\/wp-content\/uploads\/2018\/11\/q3.jpg\" alt=\"\" width=\"579\" height=\"371\" title=\"\"><\/p>\n<div id=\"essb_displayed_top_108725170\" class=\"essb_links essb_counters essb_displayed_top essb_share essb_template_light-retina essb_108725170 print-no\" data-essb-postid=\"7734\" data-essb-position=\"top\" data-essb-button-style=\"button\" data-essb-template=\"light-retina\" data-essb-counter-pos=\"inside\" data-essb-url=\"https:\/\/www.webico.vn\/captcha-la-gi-tai-sao-website-nen-su-dung-captcha\/\" data-essb-twitter-url=\"https:\/\/www.webico.vn\/captcha-la-gi-tai-sao-website-nen-su-dung-captcha\/\" data-essb-instance=\"108725170\"><\/div>\n<div>\n<div id=\"attachment_7736\" class=\"wp-caption aligncenter\"><span style=\"line-height: 1.733em;\">CAPTCHA c\u0169ng \u0111\u01b0\u1ee3c c\u00e1c \u00f4ng l\u1edbn v\u1ec1\u00a0c\u00f4ng ngh\u1ec7 s\u1eed d\u1ee5ng nh\u01b0 Google (d\u01b0\u1edbi h\u00ecnh th\u1ee9c x\u00e1c \u0111\u1ecbnh \u201cT\u00f4i kh\u00f4ng ph\u1ea3i l\u00e0 robot\u201d) \u0111\u1ec3 ng\u0103n ch\u1eb7n c\u00e1c c\u00fa click \u1ea3o t\u1ef1 \u0111\u1ed9ng t\u1eeb c\u00e1c m\u00e1y m\u00f3c, robot nh\u1eb1m t\u0103ng l\u01b0\u1ee3ng t\u01b0\u01a1ng t\u00e1c th\u1eadt. Theo th\u1ed1ng k\u00ea m\u1edbi nh\u1ea5t, n\u1ebfu con ng\u01b0\u1eddi ch\u00fang ta g\u00f5 m\u00e3 CAPTCHA v\u00e0o khung y\u00eau c\u1ea7u, kh\u1ea3 n\u0103ng \u0111\u00fang l\u00e0 80% (m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p ngo\u1ea1i l\u1ec7 CAPTCHA qu\u00e1 kh\u00f3 \u0111\u1ecdc s\u1ebd khi\u1ebfn ng\u01b0\u1eddi d\u00f9ng ph\u1ea3i g\u00f5 l\u1ea1i l\u1ea7n 2,3), c\u00f2n kh\u1ea3 n\u0103ng c\u00e1c m\u00e1y m\u00f3c kh\u00f4ng \u0111\u01b0\u1ee3c l\u1eadp tr\u00ecnh \u0111\u00fang c\u00e1ch mu\u1ed1n x\u00e2m nh\u1eadp th\u00ec kh\u1ea3 n\u0103ng th\u00e0nh c\u00f4ng c\u1ee7a n\u00f3 ch\u1ec9 l\u00e0 0,1%.<\/span><\/div>\n<p>V\u1eady, c\u00f3 th\u1ec3 n\u00f3i x\u00e1c nh\u1eadn Captcha c\u0169ng l\u00e0 m\u1ed9t h\u00ecnh th\u1ee9c b\u1ea3o v\u1ec7 ninh cho c\u00e1c c\u1ed5ng d\u1eef li\u1ec7u, th\u00f4ng tin tr\u00ean website c\u1ee7a b\u1ea1n. C\u00e1c CAPTCHA hi\u1ec7n \u0111\u1ea1i th\u1eddi nay c\u00f2n gi\u00fap t\u1ed1i \u0111a h\u00f3a vi\u1ec7c ng\u0103n ch\u1eb7n s\u1ef1 truy c\u1eadp t\u1ef1 \u0111\u1ed9ng c\u1ee7a m\u00e1y t\u00ednh v\u00e0 robot, \u0111\u1ed3ng th\u1eddi gi\u1ea3m thi\u1ec3u nh\u1eefng quy tr\u00ecnh\u00a0v\u00e0 s\u1ef1 kh\u00f3 kh\u0103n ng\u01b0\u1eddi d\u00f9ng ph\u1ea3i tr\u1ea3i qua<\/p>\n<\/div>\n<h2>T\u1ea1i sao website n\u00ean s\u1eed d\u1ee5ng Captcha?<\/h2>\n<p>V\u1edbi nh\u1eefng \u01b0u \u0111i\u1ec3m c\u1ee7a n\u00f3, CAPTCHA ng\u00e0y c\u00e0ng \u0111\u01b0\u1ee3c d\u00f9ng nhi\u1ec1u trong c\u00e1c h\u1ec7 th\u1ed1ng b\u1ea3o m\u1eadt, \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi c\u00e1c k\u00eanh s\u1edf h\u1eefu c\u01a1 s\u1edf d\u1eef li\u1ec7u l\u1edbn c\u1ea7n \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 nh\u01b0 website th\u00ec Captcha xu\u1ea5t hi\u1ec7n nh\u01b0 m\u1ed9t y\u1ebfu t\u1ed1 t\u1ea5t y\u1ebfu. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 l\u00fd do c\u0169ng nh\u01b0 l\u1ee3i \u00edch m\u00e0 c\u00e1c CAPTCHA c\u00f3 th\u1ec3 mang l\u1ea1i cho website c\u1ee7a b\u1ea1n.<\/p>\n<p><img decoding=\"async\" class=\"size-full wp-image-265 aligncenter\" src=\"https:\/\/sum.vn\/blog\/wp-content\/uploads\/2018\/11\/q5.png\" alt=\"\" width=\"511\" height=\"340\" title=\"\"><\/p>\n<div id=\"attachment_7738\" class=\"wp-caption aligncenter\">\n<p class=\"wp-caption-text\"><em>CAPTCHA nh\u01b0 m\u1ed9t gi\u1ea3i ph\u00e1p c\u1ee9u c\u00e1nh \u0111\u1ec3 ch\u1eafc ch\u1eafn r\u1eb1ng c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng truy c\u1eadp v\u00e0o nh\u1eefng n\u1ed9i dung quan tr\u1ecdng tr\u00ean website c\u1ee7a b\u1ea1n l\u00e0 ng\u01b0\u1eddi th\u1eadt<\/em><\/p>\n<\/div>\n<ul>\n<li><strong>\u0110\u1ea3m b\u1ea3o l\u01b0\u1ee3ng t\u01b0\u01a1ng t\u00e1c th\u1eadt:<\/strong> Trong website, t\u01b0\u01a1ng t\u00e1c v\u1edbi ng\u01b0\u1eddi d\u00f9ng l\u00e0 \u0111i\u1ec1u then ch\u1ed1t v\u00e0 c\u0169ng l\u00e0 m\u1ee5c ti\u00eau quan tr\u1ecdng \u0111\u01b0\u1ee3c nhi\u1ec1u doanh nghi\u1ec7p h\u01b0\u1edbng \u0111\u1ebfn. Th\u1ebf nh\u01b0ng, s\u1ebd ra sao n\u1ebfu \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1ch h\u00e0ng c\u1ee7a b\u1ea1n ch\u1ec9 l\u00e0 nh\u1eefng c\u1ed5 m\u00e1y hay con robot t\u1ef1 \u0111\u1ed9ng? C\u00e1c truy c\u1eadp b\u1ea5t h\u1ee3p ph\u00e1p n\u00e0y kh\u00f4ng mang l\u1ea1i l\u1ee3i \u00edch g\u00ec cho trang web c\u1ee7a b\u1ea1n ng\u01b0\u1ee3c l\u1ea1i c\u00f2n l\u00e0m t\u1ed1n b\u0103ng th\u00f4ng v\u00e0 dung l\u01b0\u1ee3ng web. V\u00ec v\u1eady, <a href=\"https:\/\/www.webico.vn\/captcha-la-gi-tai-sao-website-nen-su-dung-captcha\/\" target=\"_blank\" rel=\"noopener\">CAPTCHA<\/a> nh\u01b0 m\u1ed9t c\u1ee9u c\u00e1nh \u0111\u1ec3 b\u1ea1n lu\u00f4n ch\u1eafc ch\u1eafn r\u1eb1ng c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng truy c\u1eadp v\u00e0o nh\u1eefng n\u1ed9i dung quan tr\u1ecdng tr\u00ean website c\u1ee7a b\u1ea1n l\u00e0 ng\u01b0\u1eddi th\u1eadt \u2013 c\u00e1c kh\u00e1ch h\u00e0ng ti\u1ec1m n\u0103ng c\u1ee7a b\u1ea1n.<\/li>\n<\/ul>\n<ul>\n<li><strong>\u0110\u1ea3m b\u1ea3o an ninh, b\u1ea3o m\u1eadt:<\/strong> Ch\u00fang ta s\u1ebd kh\u00f4ng bi\u1ebft c\u00e1c h\u1ec7 th\u1ed1ng truy c\u1eadp t\u1ef1 \u0111\u1ed9ng hay c\u00e1c con robot sau khi truy c\u1eadp \u0111\u01b0\u1ee3c v\u00e0o website s\u1ebd l\u00e0m g\u00ec ti\u1ebfp theo, m\u1ed9t s\u1ed1 lo\u1ea1i robot \u201cl\u00e0nh t\u00ednh\u201d, kh\u00f4ng \u0111\u1ed9c h\u1ea1i nh\u01b0ng b\u00ean c\u1ea1nh \u0111\u00f3 c\u0169ng c\u00f3 t\u1ed3n t\u1ea1i nhi\u1ec1u ph\u1ea7n t\u1eed \u0111\u1ed9c h\u1ea1i mang l\u1ea1i nh\u1eefng nguy c\u01a1 r\u1ee7i ro cao cho trang web. V\u00ec v\u1eady s\u1eed d\u1ee5ng CAPTCHA ch\u00ednh l\u00e0 m\u1ed9t c\u00e1ch \u0111\u1ec3 ng\u0103n ch\u1eb7n c\u00e1c \u0111i\u1ec1u n\u00e0y x\u1ea3y ra.<\/li>\n<li><strong>Ch\u1ed1ng spam, t\u1ea1o t\u00e0i kho\u1ea3n t\u1ef1 \u0111\u1ed9ng ho\u1eb7c th\u1ef1c hi\u1ec7n t\u1ef1 \u0111\u0103ng b\u00e0i trong c\u00e1c di\u1ec5n \u0111\u00e0n, trang web:\u00a0<\/strong>Nhi\u1ec1u nh\u00e0 ph\u00e1t tri\u1ec3n web, thi\u1ebft k\u1ebf website\u00a0c\u0169ng nh\u01b0 qu\u1ea3n l\u00ed di\u1ec5n \u0111\u00e0n t\u1eebng r\u1ea5t \u0111au \u0111\u1ea7u tr\u01b0\u1edbc hi\u1ec7n tr\u1ea1ng spam, th\u1ef1c hi\u1ec7n \u0111\u0103ng b\u00e0i ho\u1eb7c spam t\u00e0i kho\u1ea3n h\u00e0ng lo\u1ea1t. V\u00e0 s\u1eed d\u1ee5ng CAPTCHA c\u00f3 th\u1ec3 gi\u00fap h\u1ecd h\u1ea1n ch\u1ebf \u0111\u01b0\u1ee3c nh\u1eefng \u0111i\u1ec1u n\u00e0y.<\/li>\n<\/ul>\n<p style=\"text-align: right;\"><strong>Nh\u01b0 Qu\u1ef3nh ATP SOFT WARE- T\u1ed5ng h\u1ee3p\u00a0<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>B\u1ea1n c\u00f3 \u0111\u1ec3 \u00fd r\u1eb1ng khi b\u1ea1n tham gia kh\u1ea3o s\u00e1t online ho\u1eb7c \u0111i\u1ec1n th\u00f4ng tin v\u00e0o form m\u1eabu \u0111\u0103ng k\u00fd n\u00e0o \u0111\u00f3, \u0111\u00f4i khi b\u1ea1n ph\u1ea3i l\u00e0m m\u1ed9t vi\u1ec7c kh\u00e1 l\u00e0 phi\u1ec1n v\u00e0 m\u1ea5t th\u1eddi gian: b\u1ea1n s\u1ebd \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u nh\u00ecn v\u00e0o m\u1ed9t h\u00ecnh nh\u1ecf bao g\u1ed3m c\u00e1c ch\u1eef c\u00e1i v\u00e0 con s\u1ed1 [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":266,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[78],"tags":[76,77],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/sum.vn\/blog\/wp-json\/wp\/v2\/posts\/263"}],"collection":[{"href":"https:\/\/sum.vn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sum.vn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sum.vn\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/sum.vn\/blog\/wp-json\/wp\/v2\/comments?post=263"}],"version-history":[{"count":0,"href":"https:\/\/sum.vn\/blog\/wp-json\/wp\/v2\/posts\/263\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sum.vn\/blog\/wp-json\/wp\/v2\/media\/266"}],"wp:attachment":[{"href":"https:\/\/sum.vn\/blog\/wp-json\/wp\/v2\/media?parent=263"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sum.vn\/blog\/wp-json\/wp\/v2\/categories?post=263"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sum.vn\/blog\/wp-json\/wp\/v2\/tags?post=263"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}