{"id":147,"date":"2010-04-17T23:30:38","date_gmt":"2010-04-18T08:30:38","guid":{"rendered":"\/blog\/?p=147"},"modified":"2023-09-21T09:39:19","modified_gmt":"2023-09-21T00:39:19","slug":"public-key-infrastructure","status":"publish","type":"post","link":"https:\/\/hasu0707.duckdns.org\/blog\/?p=147","title":{"rendered":"Public Key Infrastructure"},"content":{"rendered":"\nPublic Key Infrastructure<\/SPAN>

(1) Public Key Infrastructure ?<\/B>

\ubcf4\ud1b5 \uc904\uc5ec\uc11c PKI\ub77c\uace0 \ubd80\ub974\ub294 Public Key \uad6c\uc870\ub294 \uc55e\uc5d0\uc11c \uc124\uba85\ud55c \ub300\uce6d\ud0a4 \uae30\ubc95\uacfc\ub294 \ub2e4\ub978 \uc54c\uace0\ub9ac\uc998\uc744 \uac00\uc9c0\uace0 \uc788\ub2e4. \ubb3c\ub860 \uc554\ud638\ud654\ub97c \ud558\uaca0\ub2e4\ub294 \uae30\ubcf8\uc801\uc778 \uc0dd\uac01\uc740 \ucc28\uc774\uac00 \uc5c6\ub2e4. \ub300\uce6d\ud0a4\ub97c \uc0ac\uc6a9\ud558\ub294\ub370 \uc788\uc5b4\uc11c\uc758 \ubb38\uc81c\uc810\uc73c\ub85c 2\uac00\uc9c0\ub97c \uac70\ub860\ud588\ub294\ub370 Public Key\ub294 \uc774\uac83\uc744 \ud574\uacb0\ud574 \uc8fc\uace0 \uc788\ub2e4.

Public Key\ub97c \ub2e4\ub978 \uc6a9\uc5b4\ub85c \ud45c\ud604\ud55c\ub2e4\uba74 \ube44\ub300\uce6d\ud0a4, \ud398\uc5b4\ud0a4(Pair Key)\ub77c\ub294 \uc6a9\uc5b4\ub97c \ub4e4 \uc218 \uc788\ub2e4. \uc6a9\uc5b4\uc5d0\uc11c \ub290\uaef4\uc9c0\ub294 \uac83\uc774 \uc788\uc744 \uac83\uc774\ub2e4. \uc55e\uc5d0\uc11c \uc124\uba85\ud55c \ub300\uce6d\ud0a4 \uc54c\uace0\ub9ac\uc998\uc740 \uc7a0\uadf8\ub294 \ud0a4(\uc554\ud638\ud654\ud0a4)\uc640 \ud478\ub294 \ud0a4(\ubcf5\ud638\ud654\ud0a4)\uac00 \ub3d9\uc77c\ud558\ub2e4\ub294 \uc758\ubbf8\uc5d0\uc11c \ub300\uce6d\ud0a4\ub77c\uace0 \ubd88\ub9ac\uc6b4\ub2e4\uace0 \ud588\ub2e4. \uadf8\ub807\ub2e4\uba74 \ube44\ub300\uce6d\ud0a4\ub77c\ub294 \ub73b\uc740 \uc774 \ub450\uac1c\uc758 \ud0a4\uac00 \uc11c\ub85c \uac19\uc9c0 \uc54a\ub2e4\ub294 \uac83\uc744 \uc758\ubbf8\ud558\ub294 \uac83? \uadf8\ub807\ub2e4. Public Key\uc54c\uace0\ub9ac\uc998\uc5d0\uc11c\ub294 \uc554\ud638\ud654\ud0a4\uc640 \ubcf5\ud638\ud654\ud0a4\uac00 \ud55c\uc30d\uc758 \ud0a4(Pair Key)\ub97c \uc774\ub8e8\uace0 \uc788\ub2e4.

\uc774 \ud55c\uc30d\uc758 \ud0a4\ub294 Public Key(\uacf5\uc6a9\ud0a4)\uc640 Private Key(\uac1c\uc778\ud0a4)\ub85c \uad6c\uc131\ub418\uc5b4 \uc788\ub2e4. \uacf5\uc6a9\ud0a4\ub294 \ub204\uad6c\ub77c\ub3c4 \uc0ac\uc6a9\ud560 \uc218 \uc788\ub3c4\ub85d \uacf5\uac1c\uac00 \ub418\uba70, \uac1c\uc778\ud0a4\ub294 HDD, Smart Card\ub4f1\uc758 \uacf5\uac04\uc5d0 \ubcf4\uad00\ud558\uba74\uc11c \uc624\ub85c\uc9c0 \ud0a4\uc30d\uc744 \ub9cc\ub4e0 \uc8fc\uccb4\ub9cc \uc0ac\uc6a9\ud560 \uc218 \uc788\ub2e4\ub294 \uac83\uc774 \ubcf4\uc7a5\ub418\uc5b4\uc57c \ud55c\ub2e4.

\uc774 \ud0a4\ub4e4\uc740 \ub2e4\uc74c\uacfc \uac19\uc774 \uc0ac\uc6a9\ub41c\ub2e4. Public Key \uae30\ubc95\uc744 \uc0ac\uc6a9\ud558\uae30 \uc704\ud574\uc11c\ub294 \uba3c\uc800 '\uacf5\uc6a9\ud0a4'\uc640 '\uac1c\uc778\ud0a4'\ub77c\ub294 \ud55c\uc30d\uc758 \ud0a4\ub97c \uc0dd\uc131\ud574\uc57c \ud558\uace0, \uacf5\uc6a9\ud0a4\ub85c \uc554\ud638\ud654\ud55c \ub370\uc774\ud130\ub294 \uc624\uc9c1 \ud574\ub2f9 \uacf5\uc6a9\ud0a4\uc640 \ud55c\uc30d\uc73c\ub85c \uc0dd\uc131\ub41c \uac1c\uc778\ud0a4\ub85c\ub9cc \ud574\ub3c5\ud560 \uc218 \uc788\ub2e4\ub294 \uac83\uc774\ub2e4. \uadf8\ub807\ub2e4\uace0 \ubb34\uc870\uac74 \uacf5\uc6a9\ud0a4\ub294 \uc554\ud638\ud654\ud0a4\uc774\uace0 \uac1c\uc778\ud0a4\ub294 \ubcf5\ud638\ud654\ud0a4\ub77c\ub294 \uac1c\ub150\uc740 \uc544\ub2c8\ub2e4. \ubc18\ub300\uc0c1\ud669\ub3c4 \uc788\ub2e4. \uac1c\uc778\ud0a4\ub85c \ub370\uc774\ud130\ub97c \uc554\ud638\ud654\ud558\uba74? \uc774\ubc88\uc5d0\ub294 \ud55c\uc30d\uc5d0 \ud574\ub2f9\ud558\ub294 \uacf5\uc6a9\ud0a4\ub85c\ub9cc \ud574\ub3c5\uc774 \uac00\ub2a5\ud558\ub2e4.

\uacf5\uc6a9\ud0a4\ub294 \uc774\ub984\uc5d0\uc11c \ub290\uaef4\uc9c0\ub294 \uac83\ucc98\ub7fc \ub204\uad6c\ub098 \uc0ac\uc6a9\ud560 \uc218 \uc788\ub294 \ud0a4\ub2e4. \uacf5\uac1c\uac00 \ub418\ub294 \ud0a4\ub77c\ub294 \ub73b\uc774\ub2e4. \uc774 \ud0a4\ub294 \uc6f9\uc11c\ubc84\uc5d0 \uac8c\uc2dc\ub418\uac70\ub098 \ud30c\uc77c\uc11c\ubc84\uc5d0 \uacf5\uc720\ub418\uac70\ub098 \uc548\uc804\ud558\uc9c0 \uc54a\uc740 \uc804\uc790\uba54\uc77c\uc744 \ud1b5\ud574\uc11c \uc0c1\ub300\ubc29\uc5d0\uac8c \ubcf4\ub0b4\uc838\ub3c4 \uc544\ubb34 \ubb38\uc81c\uac00 \uc5c6\ub2e4. \ub300\uce6d\ud0a4\uc5d0\uc11c \uac00\uc84c\ub358 \ube44\ubc00\ud0a4 \uc804\uc1a1\uc758 \ubb38\uc81c\uc810\uc744 \ud574\uacb0\ud574 \uc8fc\ub294 \uac83\uc774\ub2e4. \uc608\ub97c \ub4e4\uc5b4 \uc6f9\uc11c\ubc84\uac00 \ud0a4\uc30d\uc744 \ub9cc\ub4e0\ub2e4\uc74c \uc568\ub9ac\uc2a4\uc5d0\uac8c \uacf5\uc6a9\ud0a4\ub97c \uc804\uc1a1\ud574 \uc8fc\uc5c8\ub2e4\uace0 \ud558\uc790. '\uc568\ub9ac\uc2a4'\ub294 \uacf5\uc6a9\ud0a4\ub97c \uc774\uc6a9\ud574\uc11c \uc6f9\uc11c\ubc84\ub85c \ubcf4\ub0b4\ub294 \ub370\uc774\ud130\ub97c \uc554\ud638\ud654\ud560 \uac83\uc774\ub2e4. '\uc774\ube0c'\uc5ed\uc2dc \uc774 \uacf5\uc6a9\ud0a4\ub97c \uad6c\ud558\ub294 \uac83\uc774 \uc5b4\ub835\uc9c0 \uc54a\ub2e4. \ud558\uc9c0\ub9cc \uacf5\uc6a9\ud0a4\ub97c \uc774\uc6a9\ud574\uc11c \uc568\ub9ac\uc2a4\uc758 \uc554\ud638\ud654\ub41c \ub370\uc774\ud130\ub97c \ud574\ub3c5\ud558\ub294 \uac83\uc740 \ubd88\uac00\ub2a5\ud558\ub2e4. \uacf5\uc6a9\ud0a4\ub85c \uc554\ud638\ud654\ub41c \ub370\uc774\ud130\ub294 \ud55c\uc30d\uc774 \ub418\ub294 \uac1c\uc778\ud0a4\ub85c\ub9cc \ud574\ub3c5\uc774 \uac00\ub2a5\ud558\uae30 \ub54c\ubb38\uc774\ub2e4.
\uadf8\ub7ec\ub2e4 \ubcf4\ub2c8 \uc774\uc81c \uc6f9\uc11c\ubc84\ub294 1\ub9cc\uba85\uc758 \ud68c\uc6d0\uc744 \uc704\ud574\uc11c 1\ub9cc\uac1c\uc758 \ud0a4\ub97c \uc0dd\uc131\ud560 \ud544\uc694\uac00 \uc5c6\ub2e4. \uc624\uc9c1 \ud558\ub098\uc758 \uacf5\uc6a9\ud0a4\ub9cc \uac00\uc9c0\uba74 \ub418\ub294 \uac83\uc774\ub2e4. 1\ub9cc\uba85\uc758 \ud68c\uc6d0\ub4e4\uc774 \ub3d9\uc77c\ud55c \uacf5\uc6a9\ud0a4\ub97c \uac00\uc9c0\uac8c \ub420 \ud14c\uc9c0\ub9cc \uc774\ub4e4\uc740 \uacf5\uc6a9\ud0a4\ub85c \uc554\ud638\ud654\ub97c \ud560 \uc218\ub294 \uc788\uc9c0\ub9cc \uacf5\uc6a9\ud0a4\ub85c \uc554\ud638\ud654\ub41c \ub370\uc774\ud130\ub97c \ud574\ub3c5\ud558\ub294\ub370 \uc0ac\uc6a9\ud560 \uc218\ub294 \uc5c6\ub2e4\ub294 \uac83\uc744 \uae30\uc5b5\ud558\ub77c.

\uac1c\ub150\uc744 \uc54c\uace0 \ub098\uba74 \ub2e8\uc9c0 \uadf8\ub807\uad6c\ub098! \ub77c\uace0 \uc0dd\uac01\ud560 \uc218 \uc788\uaca0\uc9c0\ub9cc \ucc98\uc74c \uc774\ub7ec\ud55c \uc54c\uace0\ub9ac\uc998\uc744 \ub9cc\ub4e0 \uc0ac\ub78c\ub4e4\uc740 \ub300\ub2e8\ud558\ub2e4\ub294 \uc0dd\uac01\uc774 \ub4e0\ub2e4. Public Key \uc54c\uace0\ub9ac\uc998\uc740 MIT\uacf5\ub300\uc5d0\uc11c \uac1c\ubc1c\ub418\uc5c8\ub2e4\uace0 \ud55c\ub2e4. \uac1c\ubc1c\ud55c \uc0ac\ub78c\ub4e4\uc758 \uc774\ub2c8\uc15c\uc744 \ub534 RSA \ud504\ub85c\ud1a0\ucf5c\uc774 \uac00\uc7a5 \ub110\ub9ac \uc0ac\uc6a9\ub418\uace0 \uc788\ub2e4.

(2) Public Key \uc554\ud638\ud654 (Confidentiality \uc81c\uacf5)<\/B>

Public Key\ub97c \uc774\uc6a9\ud55c \uc554\ud638\ud654\uc5d0 \ub300\ud574\uc11c \uc544\ub798\uc758 \uadf8\ub9bc\uc744 \ubcf4\uba74\uc11c \uc0b4\ud3b4\ubcf4\ub3c4\ub85d \ud558\uc790. \uc568\ub9ac\uc2a4\uac00 \ubc25\uc5d0\uac8c \ub370\uc774\ud130\ub97c \uc804\uc1a1\ud558\ub824\uace0 \ud55c\ub2e4. \uc911\uc694\ud55c \ub370\uc774\ud130\uc778\ub370 \uc774\ube0c\uc758 \ub3c4\uccad\uc774 \uc5fc\ub824\uc2a4\ub7fd\ub2e4. \uc548\uc804\ud558\uac8c \ubcf4\ub0b4\uae30 \uc704\ud574\uc11c \ub370\uc774\ud130\ub97c \uc554\ud638\ud654\ud558\uae30\ub85c \uacb0\uc815\ud588\ub294\ub370 \uc554\ud638\ud654\ud0a4\uac00 \ud544\uc694\ud558\ub2e4. \uc554\ud638\ud654\ud0a4\ub85c\uc368 \ub370\uc774\ud130\ub97c \uc554\ud638\ud654\ud574\uc11c \ubcf4\ub0b4\uba74 \ub370\uc774\ud130\ub97c \ubc1b\uc740 \ubc25\uc740 \ubcf5\ud638\ud654\ub97c \ud574\uc57c \ud55c\ub2e4. \uc5ed\uc2dc \ubcf5\ud638\ud654\ud0a4\uac00 \ud544\uc694\ud560 \uac83\uc774\ub2e4.


<\uacf5\uc6a9\ud0a4\ub97c \uc774\uc6a9\ud55c \uc554\ud638\ud654>

\uba3c\uc800 \uc568\ub9ac\uc2a4\ub294 \ubc25\uc758 \uacf5\uc6a9\ud0a4\ub97c \uad6c\ud558\ub294 \uac83\uc774 \uc120\ud589\ub418\uc5b4\uc57c \ud55c\ub2e4. \uadf8 \ub2e4\uc74c\uc5d0 \uc790\uc2e0\uc774 \ubcf4\ub0b4\uace0\uc790 \ud558\ub294 \ub370\uc774\ud130\ub97c \ubc25\uc758 \uacf5\uc6a9\ud0a4\ub85c\uc11c \uc554\ud638\ud654\ud558\uc5ec \uc804\uc1a1\ud574 \uc900\ub2e4. \ubc25\uc740 \uc554\ud638\ud654\ub41c \uba54\uc2dc\uc9c0\ub97c \ubc1b\uc740 \ub2e4\uc74c \uc568\ub9ac\uc2a4\uac00 \uc554\ud638\ud654\ud558\ub294\ub370 \uc0ac\uc6a9\ud55c \uacf5\uc6a9\ud0a4\uc640 \ud55c\uc30d\uc73c\ub85c \uc0dd\uc131\ud574 \ub450\uc5c8\ub358 \uac1c\uc778\ud0a4\ub97c \uc774\uc6a9\ud574\uc11c \ubcf5\ud638\ud654\ud558\uac8c \ub41c\ub2e4. \uacb0\uad6d \ub370\uc774\ud130\ub97c \uaebc\ub0bc \uc218\uac00 \uc788\uac8c \ub418\uc5c8\ub2e4.

\ud55c\uac00\uc9c0\ub294 \uc815\ub9ac\ud558\uace0 \uac00\uc790. PKI\ub97c \uc774\uc6a9\ud558\uace0\uc790 \ud560 \ub54c \uc0c1\ub300\ubc29\uc5d0\uac8c \uc548\uc804\ud558\uac8c \uc554\ud638\ud654\ub41c \ub370\uc774\ud130\ub97c \uc804\uc1a1\ud558\uace0 \uc2f6\ub2e4\uba74 \uc0c1\ub300\ubc29\uc758 \uacf5\uc6a9\ud0a4\ub97c \uc5bb\ub294 \uac83\uc774 \uccab\ubc88\uc9f8 \ud560\uc77c\uc774\ub2e4. \ub370\uc774\ud130\uc5d0\ub294 \uc5ec\ub7ec\uac00\uc9c0\uac00 \uc788\uc744 \uac83\uc774\ub2e4. \uc778\ud130\ub137 \uc1fc\ud551\ubab0\uc774 \uc6b4\uc601\ub418\uace0 \uc788\ub294 \uc6f9\uc11c\ubc84\ub85c \uc2e0\uc6a9\uce74\ub4dc\uc640 \uc720\ud6a8\uae30\uac04 \ub4f1\uc758 \uc815\ubcf4\ub97c \ubcf4\ub0bc \uc218\ub3c4 \uc788\uc744 \uac83\uc774\uace0, \ud68c\uc0ac\uc758 \uc911\uc694\ub370\uc774\ud130\ub97c \ub2f4\uc740 \uc804\uc790\uba54\uc77c \uba54\uc2dc\uc9c0\uc77c \uc218\ub3c4 \uc788\ub2e4. \uc6f9\uc11c\ubc84\uc640\uc758 \uc548\uc804\ud55c \ud1b5\uc2e0\uc744 \uc704\ud574\uc11c\ub294 \uc6f9\uc11c\ubc84\ub85c\ubd80\ud130, \uc804\uc790\uba54\uc77c\uc744 \ubcf4\ub0b4\uace0\uc790 \ud55c\ub2e4\uba74 \uc0c1\ub300\ubc29\uc73c\ub85c\ubd80\ud130, \uba3c\uc800 \ud560 \uc77c\uc740 \uacf5\uc6a9\ud0a4\ub97c \uc5bb\uc5b4\ub0b4\ub294 \uacfc\uc815\uc774 \ud544\uc694\ud558\ub2e4\ub294 \uac83\uc774\ub2e4. \uadf8 \uacf5\uc6a9\ud0a4\ub85c\uc368 \uc554\ud638\ud654\ub97c \ud588\uc744 \ub54c \ud574\ub3c5\ud560 \uc218 \uc788\ub294 \uc0ac\ub78c\uc740 \uc624\uc9c1 \uacf5\uc6a9\ud0a4\uc640 \uc30d\uc774 \ub418\ub294 \uac1c\uc778\ud0a4\ub97c \uc18c\uc720\ud55c \uc0ac\ub78c\uc774\ub2e4.

(3) Private Key \uc554\ud638\ud654 (Authenticity\uc81c\uacf5)<\/B>

\uc774\ubc88\uc5d4 \ub2e4\ub978 \uad00\uc810\uc774\ub2e4. \uac1c\uc778\ud0a4\ub97c \uc774\uc6a9\ud55c \uc554\ud638\ud654\uac00 \uc5b4\ub5a0\ud55c \uc6a9\ub3c4\ub85c \uc0ac\uc6a9\ub418\ub294\uc9c0\uc5d0 \ub300\ud574 \uc815\ub9ac\ud574 \ubcf8\ub2e4. \uc774\ubc88\uc5d4 \ubc25\uc758 \uc785\uc7a5\uc5d0\uc11c \uace0\ub824\ub97c \ud574 \ubcf4\uc790. \ubc25\uc774 \uc568\ub9ac\uc2a4\ub77c\uace0 \uc8fc\uc7a5(?)\ud558\ub294 \uc0ac\ub78c\uc73c\ub85c\ubd80\ud130 \uba54\uc2dc\uc9c0\ub97c \ubc1b\uc558\ub2e4\uace0 \uac00\uc815\ud55c\ub2e4. \ubc25\uc740 \uc790\uc2e0\uc774 \ubc1b\uc740 \uba54\uc2dc\uc9c0\uac00 \uc815\ub9d0 \uc568\ub9ac\uc2a4\uac00 \ubcf4\ub0b8 \uac83\uc778\uc9c0\ub97c \ud655\uc778\ud558\uace0 \uc2f6\uc5b4\ud55c\ub2e4.

\ud604\uc2e4\uc138\uacc4\uc5d0\uc11c \uc694\uc998 \uac70\uc758 \uc885\uc774\uc5d0 \ud39c\uc744 \uc774\uc6a9\ud574\uc11c \uae00\uc528\ub97c \uc4f0\uace0 \ud3b8\uc9c0\ub97c \ubcf4\ub0b4\ub294 \uc77c\uc774 \ub4dc\ubb38\uc77c\uc774 \ub418\uc5c8\ub2e4. \uc6b0\ub9ac\ub294 \ubb34\uc5c7\uc778\uac00 \ubb38\uc11c\ub97c \ub9cc\ub4e4\uace0 \ub098\uc11c \uc790\uc2e0\uc774 \ud655\uc778\ud588\ub2e4\ub294 \ud45c\uc2dc\ub85c '\uc790\ud544\uc11c\uba85'\uc774\ub77c\ub294 \uac83\uc744 \ud558\uace4 \ud55c\ub2e4. \uadf8\ub7ec\uba74 \uc0c1\ub300\ubc29\uc740 \uadf8 \uc11c\uba85\uc744 \ud1b5\ud574\uc11c \ubc1b\uc740 \ud3b8\uc9c0\ub97c \uc2e0\ub8b0\ud55c\ub2e4. \ub514\uc9c0\ud138 \uc138\uc0c1\uc5d0\uc11c\ub3c4 \uc774\uc640 \ub3d9\uc77c\ud55c \uc54c\uace0\ub9ac\uc998\uc758 \uc791\uc5c5\uc774 \ud589\ud574\uc9c0\uace0 \uc788\ub2e4.

\uc568\ub9ac\uc2a4\ub294 \ubc25\uc5d0\uac8c \ubcf4\ub0bc \uba54\uc2dc\uc9c0\ub97c \ub9cc\ub4e0 \ub2e4\uc74c \uc790\uc2e0\uc774 \ubcf4\ub0c8\ub2e4\ub294 \uac83\uc744 \uc99d\uba85\ud558\uae30 \uc704\ud574 \"\uc11c\uba85\"\uc744 \ud55c\ub2e4. \ubc14\ub85c \uc804\uc790\uc11c\uba85\uc774 \ub418\ub294 \uac83\uc774\ub2e4. \uc11c\uba85\uc774 \uc720\ud6a8\ud558\uae30 \uc704\ud574\uc11c\ub294 \uc9c0\ucf1c\uc838\uc57c \ud560 \uc870\uac74\uc774 \uc788\ub2e4. \ub2f9\uc0ac\uc790\uac00 \uc544\ub2cc \ub2e4\ub978 \uc0ac\ub78c\uc740 \ub3d9\uc77c\ud55c \uc11c\uba85\uc744 \ud560 \uc218 \uc788\uc5b4\uc11c\ub294 \uc548\ub41c\ub2e4\ub294 \uac83\uc774\ub2e4. \uadf8\ub807\ub2e4\uba74 \uc568\ub9ac\uc2a4\uac00 \ubc25\uc5d0\uac8c \ubcf4\ub0bc \uba54\uc2dc\uc9c0\uc5d0 \uc11c\uba85\uc744 \ud560\ub54c\ub294 \ub2e4\ub978 \uc0ac\ub78c\uc740 \uac00\uc9c0\uace0 \uc788\uc9c0 \ubabb\ud55c \uc790\uc2e0\ub9cc\uc774 \uac00\uc9c4 \uc720\uc77c\ud55c \uc99d\ud45c\ub97c \uc0ac\uc6a9\ud574\uc57c \ud560 \uac83\uc774\ub2e4. \uadf8\uac83\uc740 \ubc14\ub85c \uc790\uc2e0\uc758 Private Key(\uac1c\uc778\ud0a4)\ub97c \uc774\uc6a9\ud558\ub294 \uac83\uc774\ub2e4. \uc55e\uc5d0\uc11c \uacf5\uc6a9\ud0a4\ub294 \ub204\uad6c\uc5d0\uac8c\ub098 \uacf5\uac1c\uac00 \ub418\uc9c0\ub9cc \uac1c\uc778\ud0a4\ub294 \uc624\uc9c1 \ud0a4\uc30d\uc744 \uc0dd\uc131\ud55c \uc8fc\uccb4\ub9cc\uc774 \uac00\uc9c0\uace0 \uc788\ub2e4\uace0 \ud55c \uac83\uc744 \uae30\uc5b5\ud558\uba74 \ub420 \uac83\uc774\ub2e4.


<\uac1c\uc778\ud0a4\ub97c \uc774\uc6a9\ud55c \uc554\ud638\ud654>

\uadf8\ub9bc\uc5d0\uc11c \uc568\ub9ac\uc2a4\ub294 \ubc25\uc5d0\uac8c \ub370\uc774\ud130\ub97c \uc804\uc1a1\ud558\uace0\uc790 \ud55c\ub2e4. \ubc25\uc5d0\uac8c \uc790\uc2e0\uc774 \ubcf4\ub0b4\ub294 \uba54\uc2dc\uc9c0\ub77c\ub294 \uac83\uc744 \uc2e0\ub8b0\ud560 \uc218 \uc788\ub3c4\ub85d \ud558\uae30 \uc704\ud574\uc11c \uc790\uc2e0\ub9cc\uc774 \uac00\uc9c0\uace0 \uc788\ub294 \uac1c\uc778\ud0a4\ub97c \uc774\uc6a9\ud558\uc5ec \uba54\uc2dc\uc9c0\ub97c \uc554\ud638\ud654\ud55c\ub2e4. \uc774\uac83\uc744 \uac00\ub9ac\ucf1c\uc11c \"Digital Signature (\uc804\uc790\uc11c\uba85)\"\uc774\ub77c\uace0 \ubd80\ub978\ub2e4. \uacb0\uad6d \uc568\ub9ac\uc2a4\ub294 \uc790\uc2e0\uc774 \uc11c\uba85\ud55c \uba54\uc2dc\uc9c0\ub97c \ub124\ud2b8\uc6cc\ud06c\ub97c \ud1b5\ud574\uc11c \ubc25\uc5d0\uac8c \ubcf4\ub0b8\ub2e4. \uc774 \uba54\uc2dc\uc9c0\ub97c \ubc1b\uc740 \ubc25\uc740 \uc568\ub9ac\uc2a4\uc758 \uacf5\uc6a9\ud0a4\ub97c \uc774\uc6a9\ud574\uc11c \ubcf5\ud638\ud654\ub97c \ud558\uace0, \uc568\ub9ac\uc2a4\uc758 \uacf5\uc6a9\ud0a4\ub85c\uc368 \ubcf5\ud638\ud654\uac00 \uc774\ub8e8\uc5b4\uc9c0\uba74 \uc790\uc2e0\uc774 \ubc1b\uc740 \uba54\uc2dc\uc9c0\uac00 \uc568\ub9ac\uc2a4\uac00 \ubcf4\ub0b8 \uac83\uc774 \ub9de\ub2e4\uace0 \ud310\ub2e8\uc744 \ud55c\ub2e4. \uc568\ub9ac\uc2a4\ub97c \uac00\uc7a5\ud55c \uc81c3\uc790\uac00 \ubcf4\ub0b8 \uba54\uc2dc\uc9c0\ub77c\uba74 \uc568\ub9ac\uc2a4\uc758 \uacf5\uc6a9\ud0a4\ub85c \ud574\ub3c5\uc774 \ub418\uc9c0 \uc54a\uc744 \uac83\uc774\ub2e4.

\ub9cc\uc77c \uc774 \uba54\uc2dc\uc9c0\ub97c \ub3c4\uc911\uc5d0 \uc774\ube0c\uac00 \uac00\ub85c\ucc58\ub2e4\uba74? \uc774\ube0c\ub294 \ub2f9\uc5f0\ud788 \uc774 \uba54\uc2dc\uc9c0\ub97c \uc77d\uc744 \uc218\uac00 \uc788\ub2e4. \uc568\ub9ac\uc2a4\uc758 \uacf5\uc6a9\ud0a4\ub9cc \uc788\ub2e4\uba74 \uc5bc\ub9c8\ub4e0\uc9c0 \ud574\ub3c5\uc774 \uac00\ub2a5\ud560 \uac83\uc774\uae30 \ub54c\ubb38\uc774\ub2e4. \uae30\ubc00\uc131\uc740 \uc81c\uacf5\ub418\uc9c0 \uc54a\ub294\ub2e4\ub294 \uac83\uc744 \uc758\ubbf8\ud55c\ub2e4.

\uc774\ub807\ub4ef \uac1c\uc778\ud0a4\ub97c \uc774\uc6a9\ud574\uc11c \uc554\ud638\ud654\ud558\ub294 \uac83(\uc804\uc790\uc11c\uba85)\uc740 \uc81c3\uc790\uac00 \ub370\uc774\ud130\ub97c \uc5f4\uc9c0 \ubabb\ud558\uac8c \ud558\uae30 \uc704\ud55c \ubc29\ubc95\uc740 \uc544\ub2c8\ub2e4. \ub2e4\ub9cc \uc0c1\ub300\ubc29\uc5d0\uac8c \uc790\uc2e0\uc744 \uac00\uc7a5\ud55c \uc81c3\uc790\uac00 \uc544\ub2cc \uc9c4\uc9dc \uc790\uc2e0\uc774 \ubcf4\ub0b8 \uba54\uc2dc\uc9c0\ub77c\ub294 \uac83\uc744 \uc54c\ub824\uc8fc\uae30 \uc704\ud55c \ubc29\ubc95\uc77c \ubfd0\uc774\ub2e4.

\n\n\n\n
\uacf5\uc6a9\ud0a4\uc640 \uac1c\uc778\ud0a4\uc758 \uc0ac\uc6a9\uc6a9\ub3c4<\/B><\/FONT>

(1)\uacf5\uc6a9\ud0a4<\/B> : \ub370\uc774\ud130\ub97c \uc554\ud638\ud654\ud558\uc5ec \uae30\ubc00\uc131\uc744 \uc720\uc9c0\ud55c\ub2e4. \ub610\ud55c \uc0c1\ub300\ubc29\uc774 \uac1c\uc778\ud0a4\ub85c \uc554\ud638\ud654\ud55c \uba54\uc2dc\uc9c0\ub97c \ud574\ub3c5\ud558\uc5ec \uc0c1\ub300\ubc29\uc744 \ud655\uc778\ud560 \uc6a9\ub3c4\ub85c \uc0ac\uc6a9\ud55c\ub2e4.

(2)\uac1c\uc778\ud0a4<\/B> : \uc0c1\ub300\ubc29\uc774 \uc790\uc2e0\uc758 \uacf5\uc6a9\ud0a4\ub97c \uc774\uc6a9\ud574 \uc554\ud638\ud654\ud574\uc11c \ubcf4\ub0b8 \uba54\uc2dc\uc9c0\ub97c \ud574\ub3c5\ud558\ub294\ub370 \uc0ac\uc6a9\ud55c\ub2e4. \ub610\ud55c \uc790\uc2e0\uc758 \uba54\uc2dc\uc9c0\uc5d0 \uc804\uc790\uc11c\uba85\uc744 \ub9cc\ub4dc\ub294\ub370 \uc0ac\uc6a9\ud55c\ub2e4.<\/TD><\/TR><\/TBODY><\/TABLE>

(4) Hash\ud568\uc218\uc640 Digest (Integrity \uc81c\uacf5)<\/B>

\uac1c\uc778\ud0a4\ub97c \uc774\uc6a9\ud55c \uc804\uc790\uc11c\uba85\uacfc \ub354\ubd88\uc5b4 \ucd94\uac00\ub85c \uace0\ub824\ud574\uc57c \ud558\ub294 \ub0b4\uc6a9\uc774 \uc788\ub2e4. \ubc25\uc774 \uc568\ub9ac\uc2a4\ub85c\ubd80\ud130 \ub370\uc774\ud130\ub97c \ubc1b\uc558\uc744 \ub54c \ubc25\uc740 \uc774 \ub370\uc774\ud130\uac00 \uc568\ub9ac\uc2a4\uac00 \ubcf4\ub0b8 \uc6d0\ubcf8\ub370\uc774\ud130 \uadf8\ub300\ub85c\uc778\uc9c0, \uc989 \uc911\uac04\uc5d0\uc11c \ubcc0\uc870\uac00 \ub418\uc5c8\ub2e4\uac70\ub098 \ubc14\uc774\ub7ec\uc2a4\ucf54\ub4dc\uac00 \ucd94\uac00\ub418\uc5c8\ub2e4\uac70\ub098 \ud558\ub294 \ub4f1\uc758 \ud6fc\uc190\ub41c \uac83\uc740 \uc544\ub2cc\uc9c0\ub97c \uc54c\uace0 \uc2f6\ub2e4\ub294 \uac83\uc774\ub2e4. \uacb0\uad6d \ubb34\uacb0\uc131(integrity)\uc774 \ubcf4\uc7a5\ub418\uc5b4\uc57c \ud55c\ub2e4\ub294 \uac83\uc778\ub370, \uc774\uac83\uc740 \ubc14\ub85c Hash(\ud574\uc2dc)\ub77c\uace0 \ubd80\ub974\ub294 \ud568\uc218(Function)\uc640 \uad00\ub828\uc774 \uc788\ub2e4.

\ud574\uc2dc\ub294 \uc8fc\ub85c \uc6d0\ubcf8\uc744 \uac10\ucd94\uace0 \ud655\uc778\ud558\uae30 \uc704\ud55c \uc6a9\ub3c4\uc758 \ud568\uc218\uc778\ub370, '\ub2e8\ubc29\ud5a5 \ud568\uc218'\uc774\uba70 \uc6d0\ubcf8\uc774 1\ube44\ud2b8\ub9cc \ub2ec\ub77c\uc838\ub3c4 \ub450 \uac1c\uc758 \ubb38\uc11c\ub294 \uc11c\ub85c \ub2e4\ub978 \uacb0\uacfc\uac12\uc744 \uac00\uc9c4\ub2e4\ub294 \ud2b9\uc9d5\uc744 \uac00\uc9c0\uace0 \uc788\ub2e4. Y=f(x) \ub77c\ub294 \uc77c\ubc18\uc801\uc778 \uacf5\uc2dd\uc5d0 \ub300\uc785\uc2dc\ucf1c \ubcf4\uc790. \ud574\uc2dc\ud568\uc218 \uc5ed\uc2dc \ubaa8\ub4e0 \ud568\uc218\uac00 \uadf8\ub807\ub4ef\uc774 x\uac12\uc744 \ub300\uc785\uc2dc\ud0a4\uba74 \uacb0\uacfc\uac12(y)\uc774 \ub098\uc624\ub294\ub370, \uac70\uafb8\ub85c y\uac12\uc744 \uac00\uc9c0\uace0\ub294 x\uac00 \ubb34\uc5c7\uc774\uc5c8\ub294\uc9c0\ub97c \uad6c\ud560 \uc218\uac00 \uc5c6\ub2e4\ub294 \ud2b9\uc9d5\uc744 \uac00\uc9c4 \ud568\uc218\uc774\uae30 \ub54c\ubb38\uc5d0 '\ub2e8\ubc29\ud5a5 \ud568\uc218'\ub77c\uace0 \ubd80\ub978\ub2e4. \uc774\uac83\uc740 \ub124\ud2b8\uc6cc\ud06c \uc0c1\uc5d0\uc11c \uc0c1\ub2f9\ud788 \uc720\uc6a9\ud558\uac8c \uc4f0\uc77c \uc218 \uc788\ub2e4. \uc5b4\ub5a4 \uc0ac\uc6a9\uc790\uac00 \uc11c\ubc84\ub85c \uc790\uc2e0\uc758 \uc554\ud638\uc778 1234 \ub97c \uc804\uc1a1\ud558\uace0 \uc788\ub2e4\uace0 \uac00\uc815\uc744 \ud588\uc744 \ub54c, 1234\ub97c \uadf8\ub300\ub85c \uc804\uc1a1\ud558\uba74 \uc81c3\uc790\uc758 \ub3c4\uccad\uc704\ud5d8\uc5d0 \ub178\ucd9c\ub418\uac8c \ub41c\ub2e4. \ud558\uc9c0\ub9cc 1234\ub97c \uadf8\ub300\ub85c \uc804\uc1a1\ud558\ub294 \uac83\uc774 \uc544\ub2c8\ub77c \ud574\uc2dc\ud568\uc218\ub97c \uc774\uc6a9\ud574\uc11c \ud574\uc2dc\ud558\uc5ec \uc804\uc1a1\ud558\uac8c \ub418\uba74 \uc124\uc0ac \uc81c3\uc790\uac00 \uc774 \ud328\ud0b7\uc744 \ub3c4\uccad\ud588\ub2e4\uace0 \ud558\ub354\ub77c\ub3c4 1234\ub77c\ub294 \uc554\ud638\ub294 \uac10\ucd9c \uc218\uac00 \uc788\uae30 \ub54c\ubb38\uc774\ub2e4.

\uc81c3\uc790\ub294 \uc774 \ud328\ud0b7\uc744 \uac00\uc9c0\uace0 \uc6d0\ub798 \uc554\ud638\ub97c \uc54c\uc544\ub0b4\uae30 \uc704\ud574 \ub178\ub825\ud558\uaca0\uc9c0\ub9cc \ud574\uc2dc\ud568\uc218\uc758 \ud2b9\uc131\uc0c1 \uc6d0\ubcf8\uc744 \uc54c\uc544\ub0b4\ub294 \uac83\uc740 \uc5b4\ub835\ub2e4\uace0 \ud310\ub2e8\ub41c\ub2e4. \ud574\ud0b9\uc5d0 \uc870\uae08 \uad00\uc2ec\uc744 \uac00\uc9c4 \ub3c5\uc790\ub77c\uba74 \ud754\ud788 '\ud328\uc2a4\uc6cc\ub4dc \ud06c\ub799\ud0b9 \ud234'\ub4e4\uc5d0 \ub300\ud55c \uc774\uc57c\uae30\ub97c \uc811\ud560 \uc218 \uc788\uc744 \uac83\uc774\ub2e4. \uc774\ub7ec\ud55c \uc554\ud638 \ud06c\ub799\ud0b9 \ud234\ub4e4\uc911\uc5d0\ub294 \"\uc0ac\uc804\uacf5\uaca9(Dictionary Attack)'\uc774\ub77c\ub294 \uacf5\uaca9\ubc29\ubc95\uc744 \uc774\uc6a9\ud558\ub294 \ud234\ub4e4\uc774 \ub9ce\uc740\ub370, \uc774\ub7ec\ud55c \ud234\ub4e4\uc740 \ud574\uc2dc\uac12\uc744 \uc5ed\uc73c\ub85c \ucd94\uc801\ud574\uc11c \uc6d0\ubcf8\ub370\uc774\ud130\ub97c \uc54c\uc544\ub0b4\ub294 \uac83\uc774 \uc544\ub2c8\ub77c \uc6d0\ubcf8\ub370\uc774\ud130\ub97c \uc720\ucd94\ud558\ub294 \ubc29\uc2dd\uc744 \uc0ac\uc6a9\ud55c\ub2e4. \uc989 \uc554\ud638\ub97c \uc9d0\uc791\ud558\uc5ec \uc0dd\uc131\ud55c \ub2e4\uc74c \ud574\uc2dc\ud568\uc218\ub97c \uc774\uc6a9\ud558\uc5ec \ud574\uc2dc\ud558\uace0 \uadf8 \uac12\uc744 \uc790\uc2e0\uc774 \ub124\ud2b8\uc6cc\ud06c\uc5d0\uc11c \ud6d4\uccd0\ub0b8 \uac12\uacfc \ube44\uad50\ud558\ub294 \ubc29\ubc95\uc744 \uc774\uc6a9\ud55c\ub2e4. \ub450 \uac12\uc774 \uac19\uc73c\uba74 \uc790\uc2e0\uc774 \uc720\ucd94\ud55c \uc554\ud638\uac00 \uc0ac\uc6a9\uc790\uc758 \uc554\ud638\ub77c\uace0 \ud310\ub2e8\ud558\ub294 \uac83\uc774\ub2e4. \uc774 \ub54c \uc6d0\ubcf8\ub370\uc774\ud130\uc5d0 \ud574\ub2f9\ud558\ub294 \ub2e8\uc5b4\ub4e4\uc744 \uc815\uc758\ud55c \uc0ac\uc804\ud30c\uc77c\uc744 \uc0ac\uc6a9\ud558\uace0 \uc788\uc5b4\uc11c \uc774\ub97c \"\uc0ac\uc804\uacf5\uaca9(Dictionary Attack)'\uc774\ub77c\uace0 \ud55c\ub2e4. \ub300\ubd80\ubd84\uc758 \ubcf4\uc548\uc9c0\uce68\uc5d0\uc11c '\uc0ac\uc804\uc5d0\uc11c \uc27d\uac8c \ucc3e\uc744 \uc218 \uc788\ub294 \ub2e8\uc5b4\ub97c \uc554\ud638\ub85c \uc0ac\uc6a9\ud558\uc9c0 \ub9d0\ub77c'\ub77c\uace0 \ud558\ub294 \uc774\uc720\ub294 \ubc14\ub85c \uc774\ub7ec\ud55c \uacf5\uaca9\uc758 \uc704\ud5d8\uc744 \uc5fc\ub450\uc5d0 \ub454 \uac83\uc774\ub2e4.

\uc6d0\ubcf8\ub370\uc774\ud130\ub97c \ud574\uc2dc\ud568\uc218\ub97c \uc774\uc6a9\ud558\uc5ec \uacc4\uc0b0\ud558\uc5ec \ub098\uc624\ub294 \uac12\uc744 Digest(\uc694\uc57d)\uc774\ub77c\uace0 \ubd80\ub978\ub2e4. \uc6d0\ubcf8\ub370\uc774\ud130\uc911\uc5d0\uc11c \ubf51\uc544\ub0b8 \uc694\uc57d\ub41c \ube44\ud2b8\ub77c\ub294 \uc758\ubbf8\uc5d0\uc11c\ub2e4.

\uad6c\uccb4\uc801\uc73c\ub85c \ubb34\uacb0\uc131(Integrity)\uc744 \ubcf4\uc7a5\ud558\uae30 \uc704\ud574\uc11c \uc5b4\ub5bb\uac8c \ud574\uc2dc\ud568\uc218\uac00 \uc0ac\uc6a9\ub418\ub294\uc9c0 \uc544\ub798\uc758 \uadf8\ub9bc\uc744 \ud1b5\ud574\uc11c \uc124\uba85\ud55c\ub2e4. \uadf8\ub9bc\uc758 \ubc88\ud638\uc21c\uc73c\ub85c \ucc28\uadfc\ucc28\uadfc \uc811\uadfc\ud574 \ubcf4\uc790.


<\ud574\uc2dc\ud568\uc218\ub97c \uc774\uc6a9\ud55c \ubb34\uacb0\uc131 \ubcf4\uc7a5>

\uadf8\ub9bc\uc5d0\uc11c\ub294 \uc568\ub9ac\uc2a4\uac00 \ubc25\uc5d0\uac8c \ub370\uc774\ud130\ub97c \uc804\uc1a1\ud558\ub824\uace0 \ud55c\ub2e4. \uba3c\uc800 \uc568\ub9ac\uc2a4\ub294 \ub370\uc774\ud130\ub97c \ud574\uc2dc\ud558\uc5ec \ub2e4\uc774\uc81c\uc2a4\ud2b8\ub97c \uc0dd\uc131\ud55c\ub2e4. \ub2e4\uc774\uc81c\uc2a4\ud2b8\ub294 \ud574\uc2dc\ud568\uc218\ub97c \uc774\uc6a9\ud558\uc5ec \uc5bb\uc740 \uacb0\uacfc\uac12\uc774\ub2e4. \uc774 \ub2e4\uc774\uc81c\uc2a4\ud2b8\ub97c \uc790\uc2e0\uc758 \uac1c\uc778\ud0a4\ub97c \uc774\uc6a9\ud558\uc5ec \uc554\ud638\ud654\ud55c\ub2e4. \uac1c\uc778\ud0a4\ub97c \uac00\uc9c4 \uc0ac\ub78c\ub9cc\uc774 \ud560 \uc218 \uc788\ub294 \uc774 \uc791\uc5c5\uc774 '\uc804\uc790\uc11c\uba85'\uc774\ub77c\uace0 \uc124\uba85\ud55c \ubc14 \uc788\ub2e4. \uadf8 \ub2e4\uc74c\uc5d0 \ub124\ud2b8\uc6cc\ud06c\ub97c \ud1b5\ud574\uc11c \ubc25\uc5d0\uac8c '\uc804\uc790\uc11c\uba85\ub41c \ub370\uc774\ud130'\ub97c \uc804\uc1a1\ud55c\ub2e4. '\uc804\uc790\uc11c\uba85\ub41c \ub370\uc774\ud130'\ub77c\ub294 \ud45c\ud604\uc744 \uc798 \uc74c\ubbf8\ud574 \ubcf4\ub77c. \uc568\ub9ac\uc2a4\uac00 \uc804\uc790\uc11c\uba85\uc744 \uc5b4\ub5bb\uac8c \ub9cc\ub4e0 \uac83\uc778\uc9c0\ub97c \ubcf4\uba74 \uacb0\uad6d \uc568\ub9ac\uc2a4\uac00 \ubcf4\ub0b4\ub294 '\uc804\uc790\uc11c\uba85\ub41c \ub370\uc774\ud130'\uac00 \uc758\ubbf8\ud558\ub294 \uac83\uc740 '\uc6d0\ubcf8\ub370\uc774\ud130+\ub2e4\uc774\uc81c\uc2a4\ud2b8'\ub77c\ub294 \uac83\uc744 \uc54c \uc218 \uc788\uc744 \uac83\uc774\ub2e4.

\uc774 \uba54\uc2dc\uc9c0\ub97c \ubc1b\uc740 \ubc25\uc740 \uba87 \uac00\uc9c0 \uc791\uc5c5\uc744 \uac70\uce5c\ub2e4. \uba3c\uc800 \uc568\ub9ac\uc2a4\uac00 \ubcf4\ub0b8 \uba54\uc2dc\uc9c0\ub77c\ub294 \uac83\uc744 \ud655\uc778\ud558\uae30 \uc704\ud574 \uc568\ub9ac\uc2a4\uc758 \uacf5\uc6a9\ud0a4\ub97c \uc774\uc6a9\ud574\uc11c '\uc804\uc790\uc11c\uba85'\uc774\ub77c\ub294 \uc554\ud638\ubb38\uc744 \ud574\ub3c5\ud55c\ub2e4. \uc774 \ubcf5\ud638\ud654\uc758 \uacb0\uacfc\ub85c \uc5bb\ub294 \uac83\uc740 \uc568\ub9ac\uc2a4\uac00 \ubcf4\ub0b4\uc900 '\ub2e4\uc774\uc81c\uc2a4\ud2b8'\uc774\ub2e4. \uadf8 \ub2e4\uc74c\uc5d0 \uc6d0\ubcf8\ub370\uc774\ud130\ub97c \uc568\ub9ac\uc2a4\uac00 \uc0ac\uc6a9\ud55c \uac83\uacfc \ub3d9\uc77c\ud55c \ud574\uc2dc\ud568\uc218\ub85c \ud574\uc2dc\ud558\uc5ec \ub2e4\uc774\uc81c\uc2a4\ud2b8\ub97c \uc0dd\uc131\ud55c\ub2e4. \uadf8\ub9ac\uace0 2\uac1c\uc758 \ub2e4\uc774\uc81c\uc2a4\ud2b8\ub97c \ube44\uad50\ud558\ub294 \uc77c\uc744 \ud55c\ub2e4. \uc774 2\uac1c\uc758 \ub2e4\uc774\uc81c\uc2a4\ud2b8\uac00 \uc815\ud655\ud788 \uc77c\uce58\ud55c\ub2e4\ub294 \uac83\uc774 \ubc1d\ud600\uc9c0\uba74 \ub2e4\uc774\uc81c\uc2a4\ud2b8\ub97c \uc0dd\uc131\ud55c \uc6d0\ubcf8\uc774 \ub3d9\uc77c\ud558\ub294 \uac83\uc744 \uc99d\uba85\ud574 \uc8fc\ub294 \uac83\uc774\ub2e4. \ubc25\uc774 \ubc1b\uc740 \ub370\uc774\ud130\uac00 \ub3c4\uc911\uc5d0 \ud6fc\uc190\ub418\uc5c8\ub2e4\uba74 \ubc25\uc774 \uc9c1\uc811 \uc0dd\uc131\ud55c \ub2e4\uc774\uc81c\uc2a4\ud2b8\ub294 \uc568\ub9ac\uc2a4\uac00 \ub9cc\ub4e4\uc5b4\uc11c \ubcf4\ub0b8 \ub2e4\uc774\uc81c\uc2a4\ud2b8\uc640 '\ubd88\uc77c\uce58'\ub77c\ub294 \uacb0\uacfc\ub97c \ubcf4\uc77c \uac83\uc774\ub2e4.

\uc774\ub7ec\ud55c \ubc29\ubc95\uc744 \uc774\uc6a9\ud574\uc11c \ub370\uc774\ud130 \ubb34\uacb0\uc131\uc744 \ubcf4\uc7a5\ud574 \uc904 \uc218 \uc788\ub2e4.

\uadf8\ub9bc\uc758 \ub0b4\uc6a9\uc744 \ub2e4\uc2dc \uc694\uc57d\ud574 \ubcf4\uc558\ub2e4.

\n\n\n\n
\u2460 Alice\ub294 \uc790\uc2e0\uc774 \ub9cc\ub4e0 \ub370\uc774\ud130\ub97c Hash\ud55c \ub2e4\uc74c \uc790\uc2e0\uc758 \uac1c\uc778\ud0a4\ub85c \uc11c\uba85\ud55c\ub2e4.
\u2461 \uc804\uc790\uc11c\uba85\ub41c \uc6d0\ubcf8 \ub370\uc774\ud130\ub97c \uc804\uc1a1\ud55c\ub2e4.
\u2462 Bob\uc740 Alice\uc758 \uacf5\uc6a9\ud0a4\ub97c \uc774\uc6a9\ud558\uc5ec \uc804\uc790\uc11c\uba85\uc744 \ud574\ub3c5\ud55c\ud6c4 Alice\uc758 \uc2e0\uc6d0\uc744 \ud655\uc778\ud558\uace0 Digest\ub97c \uaebc\ub0b8\ub2e4.
\u2463 \ubc1b\uc740 \ub370\uc774\ud130\ub97c \ub3d9\uc77c\ud55c \ud568\uc218\ub85c Hash\ud558\uc5ec Digest\ub97c \uc0dd\uc131\ud55c\ub2e4.
\u2464 \uc774 \ub450 Digest\ub97c \ube44\uad50\ud558\uc5ec \uc815\ud655\ud788 \uc77c\uce58\ud558\uba74 \uc6d0\ubcf8\uc758 \ud6fc\uc190\uc774 \uc5c6\uc5c8\ub2e4\ub294 \uac83\uc774 \ubcf4\uc7a5\ub41c\ub2e4.(\ubb34\uacb0\uc131) Digest\uac00 \ub2e4\ub978 \uacb0\uacfc\uac00 \ub098\uc654\ub2e4\uba74 \uc6d0\ubcf8\uc774 \ud6fc\uc190\ub418\uc5c8\ub2e4\ub294 \uc758\ubbf8\ud55c\ub2e4.<\/TD><\/TR><\/TBODY><\/TABLE>\n","protected":false},"excerpt":{"rendered":"

Public Key Infrastructure (1) Public Key Infrastructure ? \ubcf4\ud1b5 \uc904\uc5ec\uc11c PKI\ub77c\uace0 \ubd80\ub974\ub294 Public Key \uad6c\uc870\ub294 \uc55e\uc5d0\uc11c \uc124\uba85\ud55c \ub300\uce6d\ud0a4 \uae30\ubc95\uacfc\ub294 \ub2e4\ub978 \uc54c\uace0\ub9ac\uc998\uc744 \uac00\uc9c0\uace0 \uc788\ub2e4. \ubb3c\ub860 \uc554\ud638\ud654\ub97c \ud558\uaca0\ub2e4\ub294 \uae30\ubcf8\uc801\uc778 \uc0dd\uac01\uc740 \ucc28\uc774\uac00 \uc5c6\ub2e4. \ub300\uce6d\ud0a4\ub97c \uc0ac\uc6a9\ud558\ub294\ub370 \uc788\uc5b4\uc11c\uc758 \ubb38\uc81c\uc810\uc73c\ub85c 2\uac00\uc9c0\ub97c \uac70\ub860\ud588\ub294\ub370 Public Key\ub294 \uc774\uac83\uc744 \ud574\uacb0\ud574 \uc8fc\uace0 \uc788\ub2e4. Public Key\ub97c \ub2e4\ub978 \uc6a9\uc5b4\ub85c \ud45c\ud604\ud55c\ub2e4\uba74 \ube44\ub300\uce6d\ud0a4, \ud398\uc5b4\ud0a4(Pair Key)\ub77c\ub294 \uc6a9\uc5b4\ub97c \ub4e4 \uc218 \uc788\ub2e4. \uc6a9\uc5b4\uc5d0\uc11c […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[12],"tags":[],"class_list":["post-147","post","type-post","status-publish","format-standard","hentry","category-computing_security"],"_links":{"self":[{"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/147","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=147"}],"version-history":[{"count":0,"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/147\/revisions"}],"wp:attachment":[{"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=147"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=147"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=147"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}