{"id":477294,"date":"2023-08-09T09:10:23","date_gmt":"2023-08-09T09:10:23","guid":{"rendered":""},"modified":"2023-09-05T11:14:25","modified_gmt":"2023-09-05T11:14:25","slug":"four-way-handshake","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/four-way-handshake\/","title":{"rendered":"C\u00e1i b\u1eaft tay b\u1ed1n chi\u1ec1u"},"content":{"rendered":"<p>B\u1eaft tay b\u1ed1n chi\u1ec1u l\u00e0 m\u1ed9t quy tr\u00ecnh quan tr\u1ecdng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u1ea1ng m\u00e1y t\u00ednh \u0111\u1ec3 thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i an to\u00e0n gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb, \u0111i\u1ec3n h\u00ecnh l\u00e0 trong m\u1ea1ng kh\u00f4ng d\u00e2y. N\u00f3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u1ea3 m\u00e1y kh\u00e1ch (v\u00ed d\u1ee5: thi\u1ebft b\u1ecb nh\u01b0 m\u00e1y t\u00ednh x\u00e1ch tay ho\u1eb7c \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh) v\u00e0 \u0111i\u1ec3m truy c\u1eadp (v\u00ed d\u1ee5: b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn Wi-Fi) \u0111\u1ec1u c\u00f3 th\u00f4ng tin x\u00e1c th\u1ef1c ch\u00ednh x\u00e1c \u0111\u1ec3 li\u00ean l\u1ea1c an to\u00e0n. Giao th\u1ee9c b\u1eaft tay n\u00e0y \u0111\u00f3ng vai tr\u00f2 c\u01a1 b\u1ea3n trong vi\u1ec7c ng\u0103n ch\u1eb7n truy c\u1eadp tr\u00e1i ph\u00e9p v\u00e0 \u0111\u1ea3m b\u1ea3o an to\u00e0n cho vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u qua m\u1ea1ng.<\/p>\n<h2>L\u1ecbch s\u1eed ngu\u1ed3n g\u1ed1c c\u1ee7a c\u00e1i b\u1eaft tay b\u1ed1n chi\u1ec1u v\u00e0 l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u1ec1 c\u1eadp \u0111\u1ebfn n\u00f3.<\/h2>\n<p>Kh\u00e1i ni\u1ec7m b\u1eaft tay b\u1ed1n chi\u1ec1u l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u trong b\u1ea3n s\u1eeda \u0111\u1ed5i 802.11i c\u1ee7a ti\u00eau chu\u1ea9n IEEE 802.11, trong \u0111\u00f3 x\u00e1c \u0111\u1ecbnh c\u00e1c c\u01a1 ch\u1ebf b\u1ea3o m\u1eadt cho m\u1ea1ng Wi-Fi. B\u1ea3n s\u1eeda \u0111\u1ed5i IEEE 802.11i \u0111\u01b0\u1ee3c xu\u1ea5t b\u1ea3n v\u00e0o n\u0103m 2004 \u0111\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt c\u00f3 trong c\u00e1c giao th\u1ee9c WEP (Quy\u1ec1n ri\u00eang t\u01b0 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng c\u00f3 d\u00e2y) v\u00e0 WPA (Truy c\u1eadp \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 Wi-Fi) tr\u01b0\u1edbc \u0111\u00f3.<\/p>\n<h2>Th\u00f4ng tin chi ti\u1ebft v\u1ec1 B\u1eaft tay b\u1ed1n chi\u1ec1u. M\u1edf r\u1ed9ng ch\u1ee7 \u0111\u1ec1 B\u1eaft tay b\u1ed1n chi\u1ec1u.<\/h2>\n<p>B\u1eaft tay b\u1ed1n chi\u1ec1u l\u00e0 m\u1ed9t ph\u1ea7n kh\u00f4ng th\u1ec3 thi\u1ebfu c\u1ee7a giao th\u1ee9c b\u1ea3o m\u1eadt WPA2 (Wi-Fi Protected Access 2), \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i \u0111\u1ec3 b\u1ea3o m\u1eadt m\u1ea1ng Wi-Fi hi\u1ec7n nay. N\u00f3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i an to\u00e0n gi\u1eefa thi\u1ebft b\u1ecb kh\u00e1ch v\u00e0 \u0111i\u1ec3m truy c\u1eadp theo t\u1eebng b\u01b0\u1edbc, \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u1ea3 hai b\u00ean \u0111\u1ec1u c\u00f3 kh\u00f3a m\u00e3 h\u00f3a ch\u00ednh x\u00e1c tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u truy\u1ec1n d\u1eef li\u1ec7u.<\/p>\n<h2>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a c\u00e1i b\u1eaft tay b\u1ed1n b\u01b0\u1edbc. C\u00e1ch b\u1eaft tay b\u1ed1n chi\u1ec1u ho\u1ea1t \u0111\u1ed9ng.<\/h2>\n<p>B\u1eaft tay b\u1ed1n chi\u1ec1u bao g\u1ed3m b\u1ed1n tin nh\u1eafn \u0111\u01b0\u1ee3c trao \u0111\u1ed5i gi\u1eefa m\u00e1y kh\u00e1ch v\u00e0 \u0111i\u1ec3m truy c\u1eadp:<\/p>\n<ol>\n<li>\n<p><strong>Tin nh\u1eafn 1 \u2013 Y\u00eau c\u1ea7u (M1)<\/strong>: M\u00e1y kh\u00e1ch b\u1eaft \u0111\u1ea7u b\u1eaft tay b\u1eb1ng c\u00e1ch g\u1eedi y\u00eau c\u1ea7u \u0111\u1ebfn \u0111i\u1ec3m truy c\u1eadp, cho bi\u1ebft \u00fd \u0111\u1ecbnh tham gia m\u1ea1ng c\u1ee7a n\u00f3.<\/p>\n<\/li>\n<li>\n<p><strong>Tin nh\u1eafn 2 \u2013 Ph\u1ea3n h\u1ed3i (M2)<\/strong>: \u0110\u1ec3 \u0111\u00e1p l\u1ea1i y\u00eau c\u1ea7u c\u1ee7a kh\u00e1ch h\u00e0ng, \u0111i\u1ec3m truy c\u1eadp s\u1ebd g\u1eedi m\u1ed9t tin nh\u1eafn ch\u1ee9a th\u00f4ng tin quan tr\u1ecdng, bao g\u1ed3m s\u1ed1 nonce (s\u1ed1 ng\u1eabu nhi\u00ean) v\u00e0 kh\u00f3a nh\u00f3m.<\/p>\n<\/li>\n<li>\n<p><strong>Tin nh\u1eafn 3 \u2013 Y\u00eau c\u1ea7u (M3)<\/strong>: M\u00e1y kh\u00e1ch ph\u1ea3n h\u1ed3i \u0111i\u1ec3m truy c\u1eadp b\u1eb1ng c\u00e1ch g\u1eedi m\u1ed9t y\u00eau c\u1ea7u kh\u00e1c, bao g\u1ed3m c\u1ea3 d\u1eef li\u1ec7u nonce v\u00e0 d\u1eef li\u1ec7u b\u1ed5 sung \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a b\u1eb1ng Kh\u00f3a t\u1ea1m th\u1eddi theo c\u1eb7p (PTK), b\u1eaft ngu\u1ed3n t\u1eeb kh\u00f3a chia s\u1ebb tr\u01b0\u1edbc (PSK) v\u00e0 nonces.<\/p>\n<\/li>\n<li>\n<p><strong>Tin nh\u1eafn 4 \u2013 Ph\u1ea3n h\u1ed3i (M4)<\/strong>: \u0110i\u1ec3m truy c\u1eadp x\u00e1c nh\u1eadn y\u00eau c\u1ea7u c\u1ee7a kh\u00e1ch h\u00e0ng b\u1eb1ng c\u00e1ch g\u1eedi tin nh\u1eafn cu\u1ed1i c\u00f9ng, ch\u1ee9a d\u1eef li\u1ec7u nonce v\u00e0 d\u1eef li\u1ec7u b\u1ed5 sung \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a b\u1eb1ng PTK.<\/p>\n<\/li>\n<\/ol>\n<p>Sau qu\u00e1 tr\u00ecnh trao \u0111\u1ed5i n\u00e0y, c\u1ea3 m\u00e1y kh\u00e1ch v\u00e0 \u0111i\u1ec3m truy c\u1eadp \u0111\u1ec1u \u0111\u00e3 x\u00e1c minh th\u00f4ng tin x\u00e1c th\u1ef1c c\u1ee7a nhau v\u00e0 PTK \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp. Kh\u00f3a n\u00e0y hi\u1ec7n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 m\u00e3 h\u00f3a d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n gi\u1eefa hai b\u00ean, \u0111\u1ea3m b\u1ea3o k\u00eanh li\u00ean l\u1ea1c an to\u00e0n.<\/p>\n<h2>Ph\u00e2n t\u00edch c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a b\u1eaft tay b\u1ed1n b\u01b0\u1edbc.<\/h2>\n<p>B\u1eaft tay b\u1ed1n chi\u1ec1u cung c\u1ea5p m\u1ed9t s\u1ed1 t\u00ednh n\u0103ng c\u1ea7n thi\u1ebft \u0111\u1ec3 li\u00ean l\u1ea1c an to\u00e0n:<\/p>\n<ol>\n<li>\n<p><strong>Ch\u1ee9ng th\u1ef1c l\u1eabn nhau<\/strong>: C\u1ea3 m\u00e1y kh\u00e1ch v\u00e0 \u0111i\u1ec3m truy c\u1eadp \u0111\u1ec1u x\u00e1c minh danh t\u00ednh v\u00e0 th\u00f4ng tin x\u00e1c th\u1ef1c c\u1ee7a nhau trong qu\u00e1 tr\u00ecnh b\u1eaft tay.<\/p>\n<\/li>\n<li>\n<p><strong>T\u1ea1o kh\u00f3a \u0111\u1ed9ng<\/strong>: Qu\u00e1 tr\u00ecnh b\u1eaft tay t\u1ea1o ra m\u1ed9t PTK duy nh\u1ea5t cho m\u1ed7i c\u1eb7p \u0111i\u1ec3m truy c\u1eadp m\u00e1y kh\u00e1ch, khi\u1ebfn k\u1ebb t\u1ea5n c\u00f4ng kh\u00f3 gi\u1ea3i m\u00e3 \u0111\u01b0\u1ee3c th\u00f4ng tin li\u00ean l\u1ea1c ngay c\u1ea3 khi ch\u00fang n\u1eafm b\u1eaft \u0111\u01b0\u1ee3c tin nh\u1eafn b\u1eaft tay.<\/p>\n<\/li>\n<li>\n<p><strong>Nonces t\u01b0\u01a1i<\/strong>: Nonces \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong qu\u00e1 tr\u00ecnh b\u1eaft tay l\u00e0 ng\u1eabu nhi\u00ean v\u00e0 duy nh\u1ea5t cho m\u1ed7i phi\u00ean, ng\u0103n ch\u1eb7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng l\u1eb7p l\u1ea1i.<\/p>\n<\/li>\n<li>\n<p><strong>Chuy\u1ec3n ti\u1ebfp b\u00ed m\u1eadt<\/strong>: PTK \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 m\u00e3 h\u00f3a d\u1eef li\u1ec7u kh\u00f4ng \u0111\u01b0\u1ee3c l\u1ea5y tr\u1ef1c ti\u1ebfp t\u1eeb PSK m\u00e0 t\u1eeb c\u00e1c nonces \u0111\u01b0\u1ee3c trao \u0111\u1ed5i trong qu\u00e1 tr\u00ecnh b\u1eaft tay. Thu\u1ed9c t\u00ednh n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng vi\u1ec7c x\u00e2m ph\u1ea1m m\u1ed9t PTK s\u1ebd kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ho\u1ea1t \u0111\u1ed9ng li\u00ean l\u1ea1c trong qu\u00e1 kh\u1ee9 ho\u1eb7c t\u01b0\u01a1ng lai.<\/p>\n<\/li>\n<\/ol>\n<h2>Vi\u1ebft nh\u1eefng ki\u1ec3u b\u1eaft tay b\u1ed1n chi\u1ec1u t\u1ed3n t\u1ea1i. S\u1eed d\u1ee5ng b\u1ea3ng v\u00e0 danh s\u00e1ch \u0111\u1ec3 vi\u1ebft.<\/h2>\n<p>Th\u00f4ng th\u01b0\u1eddng ch\u1ec9 c\u00f3 m\u1ed9t ki\u1ec3u b\u1eaft tay b\u1ed1n chi\u1ec1u, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u1ea1ng WPA2-PSK (Kh\u00f3a chia s\u1ebb tr\u01b0\u1edbc). Tuy nhi\u00ean, t\u00f9y thu\u1ed9c v\u00e0o giao th\u1ee9c m\u00e3 h\u00f3a \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u1ea1ng, c\u00e1ch l\u1ea5y kh\u00f3a c\u00f3 th\u1ec3 h\u01a1i kh\u00e1c m\u1ed9t ch\u00fat.<\/p>\n<p><strong>C\u00e1c ki\u1ec3u b\u1eaft tay b\u1ed1n chi\u1ec1u<\/strong>:<\/p>\n<ul>\n<li>WPA2-PSK: \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u1ea1ng gia \u0111\u00ecnh v\u00e0 v\u0103n ph\u00f2ng nh\u1ecf, n\u01a1i s\u1eed d\u1ee5ng kh\u00f3a chia s\u1ebb tr\u01b0\u1edbc (m\u1eadt kh\u1ea9u) \u0111\u1ec3 x\u00e1c th\u1ef1c.<\/li>\n<li>WPA2-Enterprise: \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c t\u1ed5 ch\u1ee9c l\u1edbn h\u01a1n, n\u01a1i m\u00e1y ch\u1ee7 x\u00e1c th\u1ef1c (v\u00ed d\u1ee5: RADIUS) x\u1eed l\u00fd qu\u00e1 tr\u00ecnh x\u00e1c th\u1ef1c.<\/li>\n<\/ul>\n<h2>C\u00e1ch s\u1eed d\u1ee5ng B\u1eaft tay b\u1ed1n b\u01b0\u1edbc, c\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng.<\/h2>\n<h3>C\u00e1c c\u00e1ch s\u1eed d\u1ee5ng b\u1eaft tay b\u1ed1n b\u01b0\u1edbc:<\/h3>\n<ol>\n<li>\n<p><strong>B\u1ea3o m\u1eadt m\u1ea1ng Wi-Fi<\/strong>: M\u1ee5c \u0111\u00edch ch\u00ednh c\u1ee7a b\u1eaft tay b\u1ed1n chi\u1ec1u l\u00e0 thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i an to\u00e0n gi\u1eefa m\u00e1y kh\u00e1ch v\u00e0 \u0111i\u1ec3m truy c\u1eadp trong m\u1ea1ng Wi-Fi.<\/p>\n<\/li>\n<li>\n<p><strong>B\u1ea3o m\u1eadt cho thi\u1ebft b\u1ecb IoT<\/strong>: B\u1eaft tay b\u1ed1n chi\u1ec1u c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o li\u00ean l\u1ea1c gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb Internet of Things (IoT) v\u00e0 c\u00e1c \u0111i\u1ec3m truy c\u1eadp, \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n v\u00e0 b\u1ea3o m\u1eadt d\u1eef li\u1ec7u.<\/p>\n<\/li>\n<\/ol>\n<h3>V\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p:<\/h3>\n<ol>\n<li>\n<p><strong>T\u1ea5n c\u00f4ng t\u1eeb \u0111i\u1ec3n<\/strong>: K\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 c\u1ed1 g\u1eafng b\u1ebb kh\u00f3a m\u1eadt kh\u1ea9u Wi-Fi b\u1eb1ng c\u00e1ch \u00e9p bu\u1ed9c PSK m\u1ed9t c\u00e1ch th\u00f4 b\u1ea1o. \u0110\u1ec3 gi\u1ea3m thi\u1ec3u \u0111i\u1ec1u n\u00e0y, ng\u01b0\u1eddi d\u00f9ng n\u00ean ch\u1ecdn m\u1eadt kh\u1ea9u m\u1ea1nh, ph\u1ee9c t\u1ea1p c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng t\u1eeb \u0111i\u1ec3n.<\/p>\n<\/li>\n<li>\n<p><strong>L\u1ed7 h\u1ed5ng WPA2<\/strong>: M\u1eb7c d\u00f9 WPA2 n\u00f3i chung l\u00e0 an to\u00e0n nh\u01b0ng tr\u01b0\u1edbc \u0111\u00e2y \u0111\u00e3 c\u00f3 nh\u1eefng l\u1ed7 h\u1ed5ng (v\u00ed d\u1ee5: t\u1ea5n c\u00f4ng KRACK) c\u00f3 th\u1ec3 khai th\u00e1c \u0111i\u1ec3m y\u1ebfu trong qu\u00e1 tr\u00ecnh b\u1eaft tay. C\u1eadp nh\u1eadt ch\u01b0\u01a1ng tr\u00ecnh c\u01a1 s\u1edf th\u01b0\u1eddng xuy\u00ean cho c\u00e1c \u0111i\u1ec3m truy c\u1eadp v\u00e0 thi\u1ebft b\u1ecb kh\u00e1ch l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 v\u00e1 c\u00e1c l\u1ed7 h\u1ed5ng \u0111\u00f3.<\/p>\n<\/li>\n<li>\n<p><strong>Ph\u00e1t l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng<\/strong>: Nh\u1eefng k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 c\u1ed1 g\u1eafng n\u1eafm b\u1eaft v\u00e0 ph\u00e1t l\u1ea1i c\u00e1c tin nh\u1eafn b\u1eaft tay \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c quy\u1ec1n truy c\u1eadp tr\u00e1i ph\u00e9p. Vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c nonces m\u1edbi v\u00e0 tri\u1ec3n khai \u0111\u00fang c\u00e1c thu\u1eadt to\u00e1n m\u00e3 h\u00f3a gi\u00fap ng\u0103n ch\u1eb7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng l\u1eb7p l\u1ea1i.<\/p>\n<\/li>\n<\/ol>\n<h2>C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh v\u00e0 c\u00e1c so s\u00e1nh kh\u00e1c v\u1edbi c\u00e1c thu\u1eadt ng\u1eef t\u01b0\u01a1ng t\u1ef1 d\u01b0\u1edbi d\u1ea1ng b\u1ea3ng v\u00e0 danh s\u00e1ch.<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u0111\u1eb7c tr\u01b0ng<\/th>\n<th>B\u1eaft tay b\u1ed1n chi\u1ec1u<\/th>\n<th>B\u1eaft tay ba chi\u1ec1u<\/th>\n<th>B\u1eaft tay hai chi\u1ec1u<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>S\u1ed1 l\u01b0\u1ee3ng tin nh\u1eafn \u0111\u01b0\u1ee3c trao \u0111\u1ed5i<\/td>\n<td>4<\/td>\n<td>3<\/td>\n<td>2<\/td>\n<\/tr>\n<tr>\n<td>Ch\u1ee9ng th\u1ef1c l\u1eabn nhau<\/td>\n<td>\u0110\u00fang<\/td>\n<td>\u0110\u00fang<\/td>\n<td>KH\u00d4NG<\/td>\n<\/tr>\n<tr>\n<td>T\u1ea1o kh\u00f3a \u0111\u1ed9ng<\/td>\n<td>\u0110\u00fang<\/td>\n<td>KH\u00d4NG<\/td>\n<td>KH\u00d4NG<\/td>\n<\/tr>\n<tr>\n<td>Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn<\/td>\n<td>B\u1ea3o m\u1eadt Wi-Fi<\/td>\n<td>K\u1ebft n\u1ed1i TCP<\/td>\n<td>Nh\u1eafn tin \u0111\u01a1n gi\u1ea3n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1c quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ee7a t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn B\u1eaft tay b\u1ed1n chi\u1ec1u.<\/h2>\n<p>B\u1eaft tay b\u1ed1n chi\u1ec1u, v\u1edbi t\u01b0 c\u00e1ch l\u00e0 c\u01a1 ch\u1ebf b\u1ea3o m\u1eadt c\u01a1 b\u1ea3n cho m\u1ea1ng Wi-Fi, s\u1ebd ti\u1ebfp t\u1ee5c l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n quan tr\u1ecdng c\u1ee7a c\u00e1c c\u00f4ng ngh\u1ec7 truy\u1ec1n th\u00f4ng kh\u00f4ng d\u00e2y trong t\u01b0\u01a1ng lai. Tuy nhi\u00ean, nh\u1eefng ti\u1ebfn b\u1ed9 trong thu\u1eadt to\u00e1n m\u00e3 h\u00f3a v\u00e0 ph\u01b0\u01a1ng ph\u00e1p x\u00e1c th\u1ef1c c\u00f3 th\u1ec3 s\u1ebd \u0111\u01b0\u1ee3c k\u1ebft h\u1ee3p \u0111\u1ec3 t\u0103ng c\u01b0\u1eddng t\u00ednh b\u1ea3o m\u1eadt c\u1ee7a qu\u00e1 tr\u00ecnh b\u1eaft tay v\u00e0 l\u00e0m cho n\u00f3 tr\u1edf n\u00ean linh ho\u1ea1t h\u01a1n tr\u01b0\u1edbc c\u00e1c m\u1ed1i \u0111e d\u1ecda m\u1edbi n\u1ed5i.<\/p>\n<h2>C\u00e1ch s\u1eed d\u1ee5ng ho\u1eb7c li\u00ean k\u1ebft m\u00e1y ch\u1ee7 proxy v\u1edbi quy tr\u00ecnh b\u1eaft tay b\u1ed1n chi\u1ec1u.<\/h2>\n<p>M\u00e1y ch\u1ee7 proxy \u0111\u00f3ng vai tr\u00f2 trung gian gi\u1eefa m\u00e1y kh\u00e1ch v\u00e0 m\u00e1y ch\u1ee7, cung c\u1ea5p th\u00eam c\u00e1c l\u1edbp b\u1ea3o m\u1eadt v\u00e0 quy\u1ec1n ri\u00eang t\u01b0. M\u1eb7c d\u00f9 m\u00e1y ch\u1ee7 proxy kh\u00f4ng \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn qu\u00e1 tr\u00ecnh b\u1eaft tay b\u1ed1n chi\u1ec1u gi\u1eefa m\u00e1y kh\u00e1ch v\u00e0 \u0111i\u1ec3m truy c\u1eadp trong m\u1ea1ng Wi-Fi nh\u01b0ng ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng c\u00f9ng v\u1edbi b\u1eaft tay \u0111\u1ec3 t\u0103ng c\u01b0\u1eddng b\u1ea3o m\u1eadt theo nhi\u1ec1u c\u00e1ch kh\u00e1c nhau:<\/p>\n<ol>\n<li>\n<p><strong>Truy\u1ec1n d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a<\/strong>: M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 m\u00e3 h\u00f3a d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n gi\u1eefa m\u00e1y kh\u00e1ch v\u00e0 m\u00e1y ch\u1ee7, b\u1ed5 sung cho m\u00e3 h\u00f3a \u0111\u01b0\u1ee3c cung c\u1ea5p b\u1edfi b\u1eaft tay b\u1ed1n chi\u1ec1u.<\/p>\n<\/li>\n<li>\n<p><strong>\u1ea8n danh v\u00e0 quy\u1ec1n ri\u00eang t\u01b0<\/strong>: M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 \u1ea9n \u0111\u1ecba ch\u1ec9 IP c\u1ee7a kh\u00e1ch h\u00e0ng kh\u1ecfi \u0111i\u1ec3m truy c\u1eadp ho\u1eb7c m\u00e1y ch\u1ee7, t\u0103ng c\u01b0\u1eddng t\u00ednh \u1ea9n danh v\u00e0 quy\u1ec1n ri\u00eang t\u01b0 trong qu\u00e1 tr\u00ecnh li\u00ean l\u1ea1c.<\/p>\n<\/li>\n<li>\n<p><strong>L\u1ecdc l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp<\/strong>: M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 l\u1ecdc v\u00e0 ch\u1eb7n l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp \u0111\u1ed9c h\u1ea1i, th\u00eam l\u1edbp b\u1ea3o m\u1eadt b\u1ed5 sung \u0111\u1ec3 ng\u0103n ch\u1eb7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng ti\u1ec1m \u1ea9n.<\/p>\n<\/li>\n<\/ol>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 B\u1eaft tay b\u1ed1n chi\u1ec1u v\u00e0 b\u1ea3o m\u1eadt m\u1ea1ng, b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o c\u00e1c t\u00e0i nguy\u00ean sau:<\/p>\n<ul>\n<li><a href=\"https:\/\/ieeexplore.ieee.org\/standard\/9426962\" target=\"_new\" rel=\"noopener nofollow\">Ti\u00eau chu\u1ea9n IEEE 802.11<\/a><\/li>\n<li><a href=\"https:\/\/www.wi-fi.org\/\" target=\"_new\" rel=\"noopener nofollow\">Li\u00ean minh Wi-Fi<\/a><\/li>\n<li><a href=\"https:\/\/www.wi-fi.org\/security\/wpa2\" target=\"_new\" rel=\"noopener nofollow\">T\u1ed5ng quan v\u1ec1 b\u1ea3o m\u1eadt WPA2<\/a><\/li>\n<\/ul>\n<p>H\u00e3y nh\u1edb r\u1eb1ng vi\u1ec7c hi\u1ec3u b\u1eaft tay b\u1ed1n chi\u1ec1u l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi b\u1ea5t k\u1ef3 ai x\u1eed l\u00fd v\u1ea5n \u0111\u1ec1 an ninh m\u1ea1ng v\u00e0 vi\u1ec7c tri\u1ec3n khai n\u00f3 m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c s\u1ebd \u0111\u1ea3m b\u1ea3o t\u00ednh b\u1ea3o m\u1eadt v\u00e0 t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n qua m\u1ea1ng Wi-Fi.<\/p>","protected":false},"featured_media":477295,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-477294","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Four-way handshake: Ensuring Secure Communication in Computer Networks<\/mark>","faq_items":[{"question":"What is the Four-way handshake, and why is it important for Wi-Fi networks?","answer":"<p>The Four-way handshake is a process used in Wi-Fi networks to establish a secure connection between a client device (e.g., laptop, smartphone) and an access point (e.g., Wi-Fi router). It ensures mutual authentication and dynamic key generation, making it essential for securing data transmission and preventing unauthorized access.<\/p>"},{"question":"How does the Four-way handshake work?","answer":"<p>The Four-way handshake involves four messages exchanged between the client and the access point. First, the client sends a request to join the network, and the access point responds with important information, including a nonce and a group key. The client then sends another request, including its nonce and encrypted data. Finally, the access point acknowledges the client's request, and both parties establish a unique Pairwise Transient Key (PTK) for secure communication.<\/p>"},{"question":"What are the key features of the Four-way handshake?","answer":"<p>The Four-way handshake provides mutual authentication, dynamic key generation, fresh nonces for preventing replay attacks, and forward secrecy. These features ensure a secure and resilient communication channel between the client and the access point.<\/p>"},{"question":"Are there different types of Four-way handshakes?","answer":"<p>Typically, there is only one type of Four-way handshake used in Wi-Fi networks, which is WPA2-PSK. However, variations may exist based on the encryption protocol used, such as WPA2-Enterprise for larger organizations with authentication servers.<\/p>"},{"question":"How can Four-way handshake be used with proxy servers?","answer":"<p>Proxy servers can work alongside the Four-way handshake to enhance security. They can encrypt data transmission, provide anonymity and privacy by hiding the client's IP address, and filter malicious traffic, adding an extra layer of protection.<\/p>"},{"question":"What are some potential issues related to Four-way handshake and their solutions?","answer":"<p>Common issues include dictionary attacks on weak passwords and vulnerabilities in WPA2. To address these, users should choose strong passwords, and regular firmware updates should be performed on access points and client devices.<\/p>"},{"question":"Where can I find more information about Four-way handshake and network security?","answer":"<p>For more in-depth details on the Four-way handshake and network security, you can refer to the IEEE 802.11 Standard, Wi-Fi Alliance's website, and explore their WPA2 security overview. OneProxy's comprehensive article is also a valuable resource on this topic.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/477294","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/477294\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/477295"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=477294"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}