{"id":477092,"date":"2023-08-09T09:06:59","date_gmt":"2023-08-09T09:06:59","guid":{"rendered":"https:\/\/oneproxy.pro\/wiki\/encryption\/"},"modified":"2023-09-05T11:13:58","modified_gmt":"2023-09-05T11:13:58","slug":"encryption","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/encryption\/","title":{"rendered":"M\u00e3 h\u00f3a"},"content":{"rendered":"<p>M\u00e3 h\u00f3a, n\u1ec1n t\u1ea3ng c\u1ee7a giao ti\u1ebfp tr\u1ef1c tuy\u1ebfn an to\u00e0n, l\u00e0 qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u sang \u0111\u1ecbnh d\u1ea1ng kh\u00f4ng th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c \u0111\u1ec3 ng\u0103n ch\u1eb7n truy c\u1eadp tr\u00e1i ph\u00e9p. D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 b\u1ea3n m\u00e3, ch\u1ec9 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3i m\u00e3 tr\u1edf l\u1ea1i d\u1ea1ng ban \u0111\u1ea7u b\u1eb1ng kh\u00f3a gi\u1ea3i m\u00e3 th\u00edch h\u1ee3p. N\u00f3 \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c b\u1ea3o m\u1eadt d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m kh\u1ecfi nh\u1eefng con m\u1eaft t\u00f2 m\u00f2 v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i, t\u1eeb b\u1ea3o m\u1eadt c\u00e1c giao d\u1ecbch tr\u1ef1c tuy\u1ebfn \u0111\u1ebfn duy tr\u00ec t\u00ednh b\u1ea3o m\u1eadt trong email v\u00e0 tin nh\u1eafn.<\/p>\n<h2>Ngu\u1ed3n g\u1ed1c c\u1ee7a m\u00e3 h\u00f3a v\u00e0 nh\u1eefng \u0111\u1ec1 c\u1eadp \u0111\u1ea7u ti\u00ean c\u1ee7a n\u00f3<\/h2>\n<p>Ngu\u1ed3n g\u1ed1c c\u1ee7a m\u00e3 h\u00f3a b\u1eaft ngu\u1ed3n t\u1eeb th\u1eddi c\u1ed5 \u0111\u1ea1i \u1edf La M\u00e3 v\u00e0 Hy L\u1ea1p. Kh\u00e1i ni\u1ec7m n\u00e0y ban \u0111\u1ea7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho th\u00f4ng tin li\u00ean l\u1ea1c qu\u00e2n s\u1ef1. M\u1ed9t trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p m\u00e3 h\u00f3a s\u1edbm nh\u1ea5t l\u00e0 M\u1eadt m\u00e3 Caesar, \u0111\u01b0\u1ee3c \u0111\u1eb7t theo t\u00ean c\u1ee7a Julius Caesar, ng\u01b0\u1eddi \u0111\u00e3 s\u1eed d\u1ee5ng n\u00f3 \u0111\u1ec3 m\u00e3 h\u00f3a c\u00e1c m\u1ec7nh l\u1ec7nh qu\u00e2n s\u1ef1 c\u1ee7a m\u00ecnh. M\u1eadt m\u00e3 ch\u1ec9 \u0111\u01a1n gi\u1ea3n l\u00e0 d\u1ecbch chuy\u1ec3n c\u00e1c ch\u1eef c\u00e1i trong b\u1ea3ng ch\u1eef c\u00e1i theo m\u1ed9t l\u01b0\u1ee3ng nh\u1ea5t \u0111\u1ecbnh \u0111\u1ec3 t\u1ea1o ra m\u1ed9t th\u00f4ng \u0111i\u1ec7p \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a m\u00e0 b\u1ea5t k\u1ef3 ai kh\u00f4ng bi\u1ebft v\u1ec1 s\u1ef1 d\u1ecbch chuy\u1ec3n \u0111\u1ec1u kh\u00f4ng th\u1ec3 hi\u1ec3u \u0111\u01b0\u1ee3c.<\/p>\n<p>Chuy\u1ec3n nhanh sang k\u1ef7 nguy\u00ean hi\u1ec7n \u0111\u1ea1i, s\u1ef1 ra \u0111\u1eddi c\u1ee7a th\u1eddi \u0111\u1ea1i k\u1ef9 thu\u1eadt s\u1ed1 \u0111\u00e3 ch\u1ee9ng ki\u1ebfn s\u1ef1 thay \u0111\u1ed5i mang t\u00ednh c\u00e1ch m\u1ea1ng trong k\u1ef9 thu\u1eadt m\u00e3 h\u00f3a. V\u00e0o nh\u1eefng n\u0103m 1970, c\u00e1c thu\u1eadt to\u00e1n kh\u00f3a \u0111\u1ed1i x\u1ee9ng nh\u01b0 DES (Ti\u00eau chu\u1ea9n m\u00e3 h\u00f3a d\u1eef li\u1ec7u) \u0111\u00e3 xu\u1ea5t hi\u1ec7n, s\u1eed d\u1ee5ng c\u00f9ng m\u1ed9t kh\u00f3a cho c\u1ea3 m\u00e3 h\u00f3a v\u00e0 gi\u1ea3i m\u00e3. Sau \u0111\u00f3, v\u00e0o cu\u1ed1i nh\u1eefng n\u0103m 1970, RSA (Rivest-Shamir-Adleman) gi\u1edbi thi\u1ec7u m\u00e3 h\u00f3a b\u1ea5t \u0111\u1ed1i x\u1ee9ng, \u0111\u00e1nh d\u1ea5u s\u1ef1 kh\u1edfi \u0111\u1ea7u m\u1ed9t ch\u01b0\u01a1ng m\u1edbi trong l\u0129nh v\u1ef1c b\u1ea3o m\u1eadt k\u1ef9 thu\u1eadt s\u1ed1.<\/p>\n<h2>X\u00e2y d\u1ef1ng v\u1ec1 m\u00e3 h\u00f3a<\/h2>\n<p>M\u00e3 h\u00f3a chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u \u0111\u01a1n gi\u1ea3n, c\u00f3 th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c th\u00e0nh v\u0103n b\u1ea3n b\u1ecb x\u00e1o tr\u1ed9n, kh\u00f4ng th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c \u0111\u1ec3 ng\u0103n ch\u1eb7n truy c\u1eadp tr\u00e1i ph\u00e9p. Qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i s\u1eed d\u1ee5ng m\u1ed9t thu\u1eadt to\u00e1n, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u1eadt m\u00e3 v\u00e0 kh\u00f3a.<\/p>\n<p>C\u00f3 hai lo\u1ea1i m\u00e3 h\u00f3a ch\u00ednh: \u0111\u1ed1i x\u1ee9ng v\u00e0 b\u1ea5t \u0111\u1ed1i x\u1ee9ng. Trong m\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng, c\u00f9ng m\u1ed9t kh\u00f3a \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u1ea3 m\u00e3 h\u00f3a v\u00e0 gi\u1ea3i m\u00e3. DES v\u00e0 AES (Ti\u00eau chu\u1ea9n m\u00e3 h\u00f3a n\u00e2ng cao) l\u00e0 nh\u1eefng v\u00ed d\u1ee5 v\u1ec1 m\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng. Trong m\u00e3 h\u00f3a b\u1ea5t \u0111\u1ed1i x\u1ee9ng, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u00e3 h\u00f3a kh\u00f3a chung, hai kh\u00f3a kh\u00e1c nhau \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng\u2014m\u1ed9t kh\u00f3a \u0111\u1ec3 m\u00e3 h\u00f3a v\u00e0 m\u1ed9t kh\u00f3a kh\u00e1c \u0111\u1ec3 gi\u1ea3i m\u00e3. RSA v\u00e0 ECC (M\u1eadt m\u00e3 \u0111\u01b0\u1eddng cong Elliptic) l\u00e0 nh\u1eefng v\u00ed d\u1ee5 v\u1ec1 m\u00e3 h\u00f3a b\u1ea5t \u0111\u1ed1i x\u1ee9ng.<\/p>\n<p>Khi d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a, n\u00f3 s\u1ebd kh\u00f4ng th\u1ec3 gi\u1ea3i m\u00e3 \u0111\u01b0\u1ee3c v\u00e0 an to\u00e0n tr\u01b0\u1edbc s\u1ef1 truy c\u1eadp tr\u00e1i ph\u00e9p. Ch\u1ec9 nh\u1eefng ng\u01b0\u1eddi c\u00f3 kh\u00f3a th\u00edch h\u1ee3p m\u1edbi c\u00f3 th\u1ec3 gi\u1ea3i m\u00e3 v\u00e0 hi\u1ec3u d\u1eef li\u1ec7u. \u0110\u00e2y l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a nhi\u1ec1u h\u1ec7 th\u1ed1ng b\u1ea3o m\u1eadt, ch\u1eb3ng h\u1ea1n nh\u01b0 HTTPS (B\u1ea3o m\u1eadt giao th\u1ee9c truy\u1ec1n si\u00eau v\u0103n b\u1ea3n) \u0111\u1ec3 duy\u1ec7t web an to\u00e0n v\u00e0 SSL\/TLS (L\u1edbp c\u1ed5ng b\u1ea3o m\u1eadt\/B\u1ea3o m\u1eadt l\u1edbp truy\u1ec1n t\u1ea3i) \u0111\u1ec3 li\u00ean l\u1ea1c qua internet an to\u00e0n.<\/p>\n<h2>Ho\u1ea1t \u0111\u1ed9ng b\u00ean trong c\u1ee7a m\u00e3 h\u00f3a<\/h2>\n<p>Qu\u00e1 tr\u00ecnh m\u00e3 h\u00f3a b\u1eaft \u0111\u1ea7u b\u1eb1ng v\u0103n b\u1ea3n g\u1ed1c (d\u1eef li\u1ec7u c\u00f3 th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c) tr\u1ea3i qua thu\u1eadt to\u00e1n m\u00e3 h\u00f3a c\u00f9ng v\u1edbi kh\u00f3a m\u00e3 h\u00f3a. Thu\u1eadt to\u00e1n m\u00e3 h\u00f3a x\u00e1o tr\u1ed9n b\u1ea3n r\u00f5 d\u1ef1a tr\u00ean kh\u00f3a m\u00e3 h\u00f3a \u0111\u1ec3 t\u1ea1o ra b\u1ea3n m\u00e3. Ch\u1ec9 c\u00f3 kh\u00f3a gi\u1ea3i m\u00e3 ch\u00ednh x\u00e1c m\u1edbi c\u00f3 th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c qu\u00e1 tr\u00ecnh v\u00e0 bi\u1ebfn b\u1ea3n m\u00e3 tr\u1edf l\u1ea1i d\u1ea1ng b\u1ea3n r\u00f5 ban \u0111\u1ea7u.<\/p>\n<p>Trong qu\u00e1 tr\u00ecnh m\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng, c\u00f9ng m\u1ed9t kh\u00f3a \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u1ea3 m\u00e3 h\u00f3a v\u00e0 gi\u1ea3i m\u00e3. Kh\u00f3a n\u00e0y ph\u1ea3i \u0111\u01b0\u1ee3c chia s\u1ebb an to\u00e0n gi\u1eefa ng\u01b0\u1eddi g\u1eedi v\u00e0 ng\u01b0\u1eddi nh\u1eadn.<\/p>\n<p>Ng\u01b0\u1ee3c l\u1ea1i, m\u00e3 h\u00f3a b\u1ea5t \u0111\u1ed1i x\u1ee9ng bao g\u1ed3m m\u1ed9t c\u1eb7p kh\u00f3a: kh\u00f3a chung \u0111\u1ec3 m\u00e3 h\u00f3a v\u00e0 kh\u00f3a ri\u00eang \u0111\u1ec3 gi\u1ea3i m\u00e3. Kh\u00f3a c\u00f4ng khai \u0111\u01b0\u1ee3c ph\u00e2n ph\u1ed1i c\u00f4ng khai, trong khi kh\u00f3a ri\u00eang \u0111\u01b0\u1ee3c ch\u1ee7 s\u1edf h\u1eefu gi\u1eef b\u00ed m\u1eadt. B\u1ea5t k\u1ef3 ai c\u0169ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng kh\u00f3a chung \u0111\u1ec3 m\u00e3 h\u00f3a tin nh\u1eafn, nh\u01b0ng ch\u1ec9 ch\u1ee7 s\u1edf h\u1eefu kh\u00f3a ri\u00eang m\u1edbi c\u00f3 th\u1ec3 gi\u1ea3i m\u00e3 \u0111\u01b0\u1ee3c.<\/p>\n<h2>C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a m\u00e3 h\u00f3a<\/h2>\n<ul>\n<li>\n<p><strong>B\u1ea3o m\u1eadt<\/strong>: M\u00e3 h\u00f3a b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u b\u1eb1ng c\u00e1ch l\u00e0m cho nh\u1eefng c\u00e1 nh\u00e2n kh\u00f4ng c\u00f3 th\u1ea9m quy\u1ec1n kh\u00f4ng th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c d\u1eef li\u1ec7u \u0111\u00f3. Ch\u1ec9 nh\u1eefng ng\u01b0\u1eddi c\u00f3 kh\u00f3a ch\u00ednh x\u00e1c m\u1edbi c\u00f3 th\u1ec3 gi\u1ea3i m\u00e3 v\u00e0 truy c\u1eadp d\u1eef li\u1ec7u g\u1ed1c.<\/p>\n<\/li>\n<li>\n<p><strong>Ch\u00ednh tr\u1ef1c<\/strong>: V\u1edbi m\u00e3 h\u00f3a, c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n xem d\u1eef li\u1ec7u c\u00f3 b\u1ecb gi\u1ea3 m\u1ea1o trong qu\u00e1 tr\u00ecnh truy\u1ec1n hay kh\u00f4ng.<\/p>\n<\/li>\n<li>\n<p><strong>X\u00e1c th\u1ef1c<\/strong>: M\u00e3 h\u00f3a kh\u00f3a chung gi\u00fap x\u00e1c minh danh t\u00ednh c\u1ee7a ng\u01b0\u1eddi g\u1eedi v\u00ec ng\u01b0\u1eddi g\u1eedi m\u00e3 h\u00f3a d\u1eef li\u1ec7u b\u1eb1ng kh\u00f3a ri\u00eang duy nh\u1ea5t c\u1ee7a h\u1ecd.<\/p>\n<\/li>\n<li>\n<p><strong>Kh\u00f4ng b\u00e1c b\u1ecf<\/strong>: M\u00e3 h\u00f3a b\u1ea5t \u0111\u1ed1i x\u1ee9ng c\u0169ng \u0111\u1ea3m b\u1ea3o kh\u00f4ng b\u1ecb ch\u1ed1i b\u1ecf, v\u00ec tin nh\u1eafn \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a b\u1eb1ng kh\u00f3a ri\u00eang ch\u1ec9 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3i m\u00e3 b\u1eb1ng kh\u00f3a chung t\u01b0\u01a1ng \u1ee9ng, cung c\u1ea5p b\u1eb1ng ch\u1ee9ng v\u1ec1 danh t\u00ednh c\u1ee7a ng\u01b0\u1eddi g\u1eedi.<\/p>\n<\/li>\n<\/ul>\n<h2>C\u00e1c lo\u1ea1i m\u00e3 h\u00f3a<\/h2>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 hai lo\u1ea1i m\u00e3 h\u00f3a ch\u00ednh:<\/p>\n<ol>\n<li>\n<p><strong>M\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng<\/strong>: \u0110\u00e2y l\u00e0 ki\u1ec3u m\u00e3 h\u00f3a trong \u0111\u00f3 c\u00f9ng m\u1ed9t kh\u00f3a \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u1ea3 m\u00e3 h\u00f3a v\u00e0 gi\u1ea3i m\u00e3.<\/p>\n<p>V\u00ed d\u1ee5 v\u1ec1 m\u00e3 h\u00f3a \u0111\u1ed1i x\u1ee9ng:<\/p>\n<table>\n<thead>\n<tr>\n<th>Thu\u1eadt to\u00e1n<\/th>\n<th>K\u00edch th\u01b0\u1edbc ph\u00edm<\/th>\n<th>K\u00edch th\u01b0\u1edbc kh\u1ed1i<\/th>\n<th>Ghi ch\u00fa<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>DES<\/td>\n<td>56 bit<\/td>\n<td>64 bit<\/td>\n<td>Hi\u1ec7n \u0111\u01b0\u1ee3c coi l\u00e0 kh\u00f4ng an to\u00e0n cho h\u1ea7u h\u1ebft c\u00e1c \u1ee9ng d\u1ee5ng<\/td>\n<\/tr>\n<tr>\n<td>3DES<\/td>\n<td>168 bit<\/td>\n<td>64 bit<\/td>\n<td>An to\u00e0n h\u01a1n DES nh\u01b0ng ch\u1eadm h\u01a1n<\/td>\n<\/tr>\n<tr>\n<td>AES<\/td>\n<td>128\/192\/256 bit<\/td>\n<td>128 bit<\/td>\n<td>Thu\u1eadt to\u00e1n \u0111\u1ed1i x\u1ee9ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i nh\u1ea5t hi\u1ec7n nay<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n<li>\n<p><strong>M\u00e3 h\u00f3a b\u1ea5t \u0111\u1ed1i x\u1ee9ng<\/strong>: C\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u00e3 h\u00f3a kh\u00f3a chung, lo\u1ea1i n\u00e0y s\u1eed d\u1ee5ng hai kh\u00f3a: m\u1ed9t kh\u00f3a chung (\u0111\u1ec3 m\u00e3 h\u00f3a) v\u00e0 m\u1ed9t kh\u00f3a ri\u00eang (\u0111\u1ec3 gi\u1ea3i m\u00e3).<\/p>\n<p>V\u00ed d\u1ee5 v\u1ec1 m\u00e3 h\u00f3a b\u1ea5t \u0111\u1ed1i x\u1ee9ng:<\/p>\n<table>\n<thead>\n<tr>\n<th>Thu\u1eadt to\u00e1n<\/th>\n<th>K\u00edch th\u01b0\u1edbc ph\u00edm<\/th>\n<th>Ghi ch\u00fa<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>RSA<\/td>\n<td>1024\/2048\/4096 bit<\/td>\n<td>Thu\u1eadt to\u00e1n kh\u00f3a c\u00f4ng khai \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t<\/td>\n<\/tr>\n<tr>\n<td>ECC<\/td>\n<td>160-521 bit<\/td>\n<td>Cung c\u1ea5p b\u1ea3o m\u1eadt t\u01b0\u01a1ng t\u1ef1 nh\u01b0 RSA nh\u01b0ng v\u1edbi k\u00edch th\u01b0\u1edbc kh\u00f3a nh\u1ecf h\u01a1n nhi\u1ec1u<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n<\/ol>\n<h2>Vi\u1ec7c s\u1eed d\u1ee5ng, v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p trong m\u00e3 h\u00f3a<\/h2>\n<p>M\u00e3 h\u00f3a c\u00f3 m\u1eb7t kh\u1eafp n\u01a1i trong cu\u1ed9c s\u1ed1ng s\u1ed1 c\u1ee7a ch\u00fang ta, b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u khi truy\u1ec1n v\u00e0 khi l\u01b0u tr\u1eef. N\u00f3 b\u1ea3o v\u1ec7 th\u00f4ng tin nh\u1ea1y c\u1ea3m c\u1ee7a ch\u00fang t\u00f4i tr\u00ean internet, b\u1ea3o m\u1eadt li\u00ean l\u1ea1c qua email, b\u1ea3o v\u1ec7 c\u00e1c giao d\u1ecbch t\u00e0i ch\u00ednh v\u00e0 h\u01a1n th\u1ebf n\u1eefa.<\/p>\n<p>Tuy nhi\u00ean, m\u00e3 h\u00f3a kh\u00f4ng ph\u1ea3i l\u00e0 kh\u00f4ng c\u00f3 v\u1ea5n \u0111\u1ec1. Qu\u1ea3n l\u00fd kh\u00f3a l\u00e0 m\u1ed9t th\u00e1ch th\u1ee9c v\u00ec n\u1ebfu m\u1ea5t kh\u00f3a, d\u1eef li\u1ec7u \u0111\u00e3 m\u00e3 h\u00f3a s\u1ebd kh\u00f4ng th\u1ec3 ph\u1ee5c h\u1ed3i \u0111\u01b0\u1ee3c. H\u01a1n n\u1eefa, m\u00e3 h\u00f3a m\u1ea1nh c\u00f3 th\u1ec3 t\u1ed1n nhi\u1ec1u t\u00e0i nguy\u00ean v\u00e0 c\u00f3 th\u1ec3 l\u00e0m ch\u1eadm hi\u1ec7u su\u1ea5t h\u1ec7 th\u1ed1ng.<\/p>\n<p>Nh\u1eefng v\u1ea5n \u0111\u1ec1 n\u00e0y \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft b\u1eb1ng c\u00e1ch l\u00e0m theo c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t nh\u01b0 sao l\u01b0u kh\u00f3a th\u00f4ng th\u01b0\u1eddng, s\u1eed d\u1ee5ng kh\u1ea3 n\u0103ng t\u0103ng t\u1ed1c ph\u1ea7n c\u1ee9ng cho c\u00e1c t\u00e1c v\u1ee5 m\u00e3 h\u00f3a v\u00e0 tri\u1ec3n khai ch\u00ednh s\u00e1ch m\u00e3 h\u00f3a m\u1ea1nh m\u1ebd.<\/p>\n<h2>So s\u00e1nh v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m<\/h2>\n<p>M\u00e3 h\u00f3a so v\u1edbi M\u00e3 h\u00f3a so v\u1edbi B\u0103m:<\/p>\n<table>\n<thead>\n<tr>\n<th><\/th>\n<th>M\u00e3 h\u00f3a<\/th>\n<th>M\u00e3 h\u00f3a<\/th>\n<th>B\u0103m<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>M\u1ee5c \u0111\u00edch<\/td>\n<td>T\u00ednh b\u1ea3o m\u1eadt v\u00e0 an ninh<\/td>\n<td>S\u1ef1 mi\u00eau t\u1ea3 d\u1eef li\u1ec7u<\/td>\n<td>X\u00e1c minh d\u1eef li\u1ec7u<\/td>\n<\/tr>\n<tr>\n<td>Ch\u00eca kh\u00f3a<\/td>\n<td>Y\u00eau c\u1ea7u<\/td>\n<td>Kh\u00f4ng y\u00eau c\u1ea7u<\/td>\n<td>Kh\u00f4ng y\u00eau c\u1ea7u<\/td>\n<\/tr>\n<tr>\n<td>Kh\u1ea3 n\u0103ng \u0111\u1ea3o ng\u01b0\u1ee3c<\/td>\n<td>C\u00f3, v\u1edbi ph\u00edm ch\u00ednh x\u00e1c<\/td>\n<td>C\u00f3, v\u1edbi thu\u1eadt to\u00e1n ch\u00ednh x\u00e1c<\/td>\n<td>Kh\u00f4ng, quy tr\u00ecnh m\u1ed9t chi\u1ec1u<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 t\u01b0\u01a1ng lai trong m\u00e3 h\u00f3a<\/h2>\n<p>T\u01b0\u01a1ng lai c\u1ee7a m\u00e3 h\u00f3a n\u1eb1m \u1edf \u0111i\u1ec7n to\u00e1n l\u01b0\u1ee3ng t\u1eed v\u00e0 m\u1eadt m\u00e3 h\u1eadu l\u01b0\u1ee3ng t\u1eed. \u0110i\u1ec7n to\u00e1n l\u01b0\u1ee3ng t\u1eed \u0111\u1eb7t ra m\u1ed1i \u0111e d\u1ecda \u0111\u1ed1i v\u1edbi c\u00e1c thu\u1eadt to\u00e1n m\u00e3 h\u00f3a hi\u1ec7n t\u1ea1i, v\u00ec v\u1ec1 m\u1eb7t l\u00fd thuy\u1ebft, m\u00e1y t\u00ednh l\u01b0\u1ee3ng t\u1eed c\u00f3 th\u1ec3 b\u1ebb kh\u00f3a c\u00e1c thu\u1eadt to\u00e1n n\u00e0y nhanh h\u01a1n m\u00e1y t\u00ednh th\u00f4ng th\u01b0\u1eddng.<\/p>\n<p>\u0110\u1ec3 ch\u1ed1ng l\u1ea1i \u0111i\u1ec1u n\u00e0y, m\u1eadt m\u00e3 h\u1eadu l\u01b0\u1ee3ng t\u1eed \u0111ang \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n, bao g\u1ed3m c\u00e1c thu\u1eadt to\u00e1n m\u00e3 h\u00f3a c\u00f3 th\u1ec3 ch\u1ed1ng l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng t\u1eeb c\u1ea3 m\u00e1y t\u00ednh c\u1ed5 \u0111i\u1ec3n v\u00e0 l\u01b0\u1ee3ng t\u1eed.<\/p>\n<h2>M\u00e1y ch\u1ee7 m\u00e3 h\u00f3a v\u00e0 proxy<\/h2>\n<p>C\u00e1c m\u00e1y ch\u1ee7 proxy, gi\u1ed1ng nh\u01b0 c\u00e1c m\u00e1y ch\u1ee7 do OneProxy cung c\u1ea5p, \u0111\u00f3ng vai tr\u00f2 trung gian gi\u1eefa ng\u01b0\u1eddi d\u00f9ng v\u00e0 internet. M\u1eb7c d\u00f9 vai tr\u00f2 ch\u00ednh c\u1ee7a m\u00e1y ch\u1ee7 proxy kh\u00f4ng ph\u1ea3i l\u00e0 m\u00e3 h\u00f3a nh\u01b0ng n\u00f3 th\u01b0\u1eddng k\u1ebft h\u1ee3p m\u00e3 h\u00f3a \u0111\u1ec3 cung c\u1ea5p c\u00e1c k\u1ebft n\u1ed1i an to\u00e0n.<\/p>\n<p>V\u00ed d\u1ee5: proxy SSL s\u1eed d\u1ee5ng m\u00e3 h\u00f3a SSL \u0111\u1ec3 b\u1ea3o m\u1eadt vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u gi\u1eefa ng\u01b0\u1eddi d\u00f9ng v\u00e0 m\u00e1y ch\u1ee7 proxy. H\u01a1n n\u1eefa, m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng k\u1ebft h\u1ee3p v\u1edbi VPN (M\u1ea1ng ri\u00eang \u1ea3o) \u0111\u1ec3 m\u00e3 h\u00f3a d\u1eef li\u1ec7u v\u00e0 che gi\u1ea5u \u0111\u1ecba ch\u1ec9 IP c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, mang l\u1ea1i s\u1ef1 ri\u00eang t\u01b0 v\u00e0 b\u1ea3o m\u1eadt n\u00e2ng cao.<\/p>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.nist.gov\/publications\/introduction-public-key-technology-and-federal-pki-infrastructure\" target=\"_new\" rel=\"noopener nofollow\">Gi\u1edbi thi\u1ec7u c\u1ee7a NIST v\u1ec1 M\u1eadt m\u00e3 kh\u00f3a c\u00f4ng khai<\/a><\/li>\n<li><a href=\"https:\/\/www.khanacademy.org\/computing\/computer-science\/cryptography\" target=\"_new\" rel=\"noopener nofollow\">Kh\u00f3a h\u1ecdc v\u1ec1 m\u1eadt m\u00e3 c\u1ee7a Khan Academy<\/a><\/li>\n<li><a href=\"https:\/\/www.coursera.org\/learn\/crypto\" target=\"_new\" rel=\"noopener nofollow\">Kh\u00f3a h\u1ecdc m\u1eadt m\u00e3 c\u1ee7a \u0110\u1ea1i h\u1ecdc Stanford<\/a><\/li>\n<\/ul>","protected":false},"featured_media":0,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-477092","wiki","type-wiki","status-publish","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Encryption: An Essential Component of Digital Security<\/mark>","faq_items":[{"question":"What is Encryption?","answer":"<p>Encryption is the process of converting data into an unreadable format to prevent unauthorized access. It plays a crucial role in securing sensitive data from prying eyes and is widely used, from securing online transactions to maintaining confidentiality in emails and messages.<\/p>"},{"question":"When was Encryption first used?","answer":"<p>Encryption has been in use since the times of ancient Rome and Greece. One of the earliest instances of encryption is the Caesar Cipher, used by Julius Caesar to encrypt his military commands. However, in the modern digital era, encryption saw significant advancements with the introduction of symmetric-key algorithms like DES in the 1970s and asymmetric encryption with RSA later in the same decade.<\/p>"},{"question":"How does Encryption work?","answer":"<p>The encryption process involves converting plaintext (readable data) into ciphertext (unreadable data) using an encryption algorithm and a key. In symmetric encryption, the same key is used for encryption and decryption. In contrast, asymmetric encryption uses a public key for encryption and a private key for decryption.<\/p>"},{"question":"What are the key features of Encryption?","answer":"<p>The key features of encryption include confidentiality (it makes data unreadable to unauthorized individuals), integrity (it can detect if data has been tampered with during transmission), authentication (public-key encryption can verify the sender's identity), and non-repudiation (asymmetric encryption provides proof of the sender's identity).<\/p>"},{"question":"What are the types of Encryption?","answer":"<p>There are two main types of encryption: symmetric and asymmetric. Symmetric encryption uses the same key for both encryption and decryption, with DES and AES as examples. Asymmetric encryption, or public-key encryption, uses two different keys - one for encryption and another for decryption, with RSA and ECC as examples.<\/p>"},{"question":"What are some problems and solutions related to Encryption?","answer":"<p>One of the challenges with encryption is key management. If a key is lost, the encrypted data cannot be recovered. Encryption can also be resource-intensive and slow down system performance. Solutions include regular key backups, using hardware acceleration for encryption tasks, and implementing a robust encryption policy.<\/p>"},{"question":"What is the future of Encryption?","answer":"<p>The future of encryption lies in the field of quantum computing and post-quantum cryptography. Quantum computers could potentially crack current encryption algorithms faster than conventional computers. In response, post-quantum cryptography is being developed, which includes encryption algorithms resistant to both classical and quantum computer attacks.<\/p>"},{"question":"How do proxy servers relate to Encryption?","answer":"<p>While the primary role of a proxy server is not encryption, it often incorporates encryption to provide secure connections. SSL proxies use SSL encryption to secure the data transmission between the user and the proxy server. Proxy servers can also be used with VPNs to both encrypt data and mask a user's IP address, providing enhanced privacy and security.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/477092","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\/477092\/revisions"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=477092"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}