{"id":44207,"date":"2021-07-19T14:05:46","date_gmt":"2021-07-19T05:05:46","guid":{"rendered":"https:\/\/www.charlezz.com\/?p=44207"},"modified":"2021-07-19T14:05:46","modified_gmt":"2021-07-19T05:05:46","slug":"%ea%b3%a0%ec%a0%84%ec%95%94%ed%98%b8-%ea%b5%ac%ed%98%84%ed%95%b4%eb%b3%b4%ea%b8%b0%ec%8b%9c%ec%a0%80-%ec%95%94%ed%98%b8-%eb%b9%84%ec%a6%88%eb%84%a4%eb%a5%b4-%ec%95%94%ed%98%b8","status":"publish","type":"post","link":"https:\/\/charlezz.com\/?p=44207","title":{"rendered":"\uace0\uc804\uc554\ud638 \uad6c\ud604\ud574\ubcf4\uae30(\uc2dc\uc800 \uc554\ud638, \ube44\uc988\ub124\ub974 \uc554\ud638)"},"content":{"rendered":"

\uace0\uc804\uc554\ud638<\/h2>\n

\uace0\uc804\uc554\ud638(Classical cipher)\ub294 \uacfc\uac70\uc5d0 \uc0ac\uc6a9\ub418\uc5c8\uc73c\ub098 \uc9c0\uae08\uc740 \uc0ac\uc6a9\ud558\uc9c0 \uc54a\ub294 \uc554\ud638\uc758 \ud615\ud0dc\uc774\ub2e4. \uc9c0\uae08\uc740 \ucef4\ud4e8\ud130\ub85c \ube44\ud2b8\ub97c \ub2e4\ub8e8\ub294 \uc554\ud638\ub97c \uc0ac\uc6a9\ud558\uc9c0\ub9cc \uacfc\uac70\uc5d0\ub294 \uc0ac\ub78c\uc774 \uc554\ud638\ud654\uc640 \ubcf5\ud638\ud654\ub97c \ud574\uc57c\ud588\uae30 \ub54c\ubb38\uc5d0 \uace0\uc804\uc554\ud638\ub294 \uc624\ub298\ub0a0\uc758 \uc554\ud638\ubcf4\ub2e4 \ud6e8\uc52c \ub2e8\uc21c\ud558\ub2e4.\u00a0<\/p>\n

\uace0\uc804\uc554\ud638\uc5d0\uc11c \uac00\uc7a5 \ub300\ud45c\uc801\uc778 \uc2a4\ud0a4\ud14c\uc77c \uc554\ud638, \uc2dc\uc800 \uc554\ud638, \ube44\uc988\ub124\ub974 \uc554\ud638\uc5d0 \ub300\ud574\uc11c \uc54c\uc544\ubcf4\uc790.<\/p>\n

\uc2a4\ud0a4\ud14c\uc77c \uc554\ud638(Scytale cipher)<\/h3>\n

\uace0\ub300 \uadf8\ub9ac\uc2a4\uc758 \uc5ed\uc0ac\ud559\uc790 \ud50c\ub8e8\ud0c0\ub974\ud06c\uc5d0 \ub530\ub974\uba74 \uc57d 2,500\ub144 \uc804 \uadf8\ub9ac\uc2a4 \uc9c0\uc5ed\uc758 \uc61b \ub098\ub77c\uc778 \uc2a4\ud30c\ub974\ud0c0\uc5d0\uc11c\ub294 \uc804\uc7c1\ud130\uc5d0 \ub098\uac00\uc788\ub294 \uad70\ub300\uc5d0 \ube44\ubc00\uba54\uc2dc\uc9c0\ub97c \uc804\ud560 \ub54c \uc554\ud638\ub97c \uc0ac\uc6a9\ud588\ub2e4. \uc774\ub4e4\uc758 \uc554\ud638\ub294 \uc138\uc6d4\uc774 \ud750\ub978 \ud6c4 \uc624\ub298\ub0a0\uc758 \uc2dc\uac01\uc5d0\uc11c \ubcf4\uba74 \ubbfc\uac04\uc778\ub3c4 \uae08\uc138 \uc54c\uc544\ucc28\ub9b4\uc218 \uc788\uc744 \uc815\ub3c4\ub85c \ub9e4\uc6b0 \uac04\ub2e8\ud558\ub2e4. \ud558\uc9c0\ub9cc \uadf8\ub54c \ub2f9\uc2dc\ub85c\uc11c\ub294 \uc544\ubb34\ub098 \uc27d\uac8c \uc554\ud638\ubb38\uc744 \uc5f4\uc5b4 \ubcfc\uc218 \uc5c6\ub294, \uc544\uc8fc \uad50\ubb18\ud558\uace0\ub3c4 \ud68d\uae30\uc801\uc778 \ubc29\ubc95\uc774\uc5c8\ub2e4. \uc774\ub54c \uc0ac\uc6a9\ud55c \uc554\ud638\ud654\ubc29\ubc95\uc740 \uc2a4\ud0a4\ud14c\uc77c(Scytale)\uc554\ud638\ub77c \ud558\uace0 \ub2f9\uc2dc\uc758 \uc804\uc7c1\ud130\uc5d0\uc120 \ub2e4\uc74c\uacfc \uac19\uc740 \ubc29\ubc95\uc73c\ub85c \uc554\ud638\ud654\ud558\uc600\ub2e4.<\/p>\n

\"\"<\/a><\/p>\n

\uc2a4\ud0a4\ud14c\uc77c, \uadf8\ub9ac\uc2a4\uc5b4\ub85c \ubc14\ud1a4\uc774\ub77c\ub294 \ub73b\uc774\ub2e4.<\/p>\n<\/div>\n

    \n
  1. \uc804\uc7c1\ud130\uc5d0 \ub098\uac08 \uad70\ub300\uc640 \ubcf8\uad6d\uc5d0 \ub0a8\uc544\uc788\ub294 \uc815\ubd80\ub294 \uac01\uc790, \uc2a4\ud0a4\ud14c\uc77c(Scytale)\uc774\ub77c\uace0 \ud558\ub294 \uad75\uae30\uc758 \uc6d0\ud1b5\ud615 \ub9c9\ub300\uae30\ub97c \ub098\ub204\uc5b4 \uac16\ub294\ub2e4.<\/li>\n
  2. \ube44\ubc00\ub9ac\uc5d0 \ubcf4\ub0b4\uc57c \ud560 \uba54\uc2dc\uc9c0\uac00 \uc0dd\uae30\uba74, \ubcf8\uad6d \uc815\ubd80\uc758 \uc554\ud638 \ub2f4\ub2f9\uc790\ub294 \uc2a4\ud0a4\ud14c\uc77c\uc5d0 \uac00\ub290\ub2e4\ub780 \uc591\ud53c\uc9c0 \ub9ac\ubcf8\uc744 \uc704\uc5d0\uc11c \uc544\ub798\ub85c \uac10\uc740 \ub2e4\uc74c \uc606\uc73c\ub85c \uba54\uc2dc\uc9c0\ub97c \uc801\ub294\ub2e4.<\/li>\n
  3. \ub9ac\ubcf8\uc744 \ud480\uc5b4\ub0b4\uc5b4 \ud3bc\uce58\uba74 \uba54\uc2dc\uc9c0\uc758 \ub0b4\uc6a9\uc740 \uc544\ubb34\ub098 \uc77d\uc744 \uc218 \uc5c6\uac8c \ub41c\ub2e4.<\/li>\n
  4. \uc804\uc7c1\ud130\uc5d0 \ub098\uac00\uc788\ub294 \uc624\ub85c\uc9c0 \uac19\uc740 \uad75\uae30\uc758 \uc6d0\ud1b5\ub9c9\ub300\uae30\ub97c \uac00\uc9c4 \uc0ac\ub78c\ub9cc\uc774 \uba54\uc2dc\uc9c0\ub97c \uc77d\uc744 \uc218 \uc788\ub2e4.<\/li>\n<\/ol>\n

     <\/p>\n

    \uc2dc\uc800 \uc554\ud638(Caesar cipher)<\/h3>\n

    \ub85c\ub9c8\uc758 \ud669\uc81c \uc728\ub9ac\uc6b0\uc2a4 \uce74\uc774\uc0ac\ub974\uc758 \uc774\ub984\uc744 \ub530\uc11c \ub9cc\ub4e0 \uc554\ud638\uc774\ub2e4. \uadf8\ub807\uae30 \ub54c\ubb38\uc5d0 \uce74\uc774\uc0ac\ub974 \uc554\ud638 \ub610\ub294 \uc2dc\uc800 \uc554\ud638\ub77c\uace0 \ud55c\ub2e4. \uce74\uc774\uc0ac\ub974\uac00 \uc368\uc11c \uc720\uba85\ud574\uc9c4 \uac83\uc774\uc9c0, \uadf8\ubcf4\ub2e4 \uc55e\uc11c\uc11c \uc0ac\uc6a9\ud55c \uc0ac\ub78c\ub4e4\uc774 \uc788\ub2e4\uace0 \ud55c\ub2e4. \uc2dc\uc800 \uc554\ud638\ub294 \uc554\ud638\ud654\ud558\uace0\uc790 \ud558\ub294 \ub0b4\uc6a9\uc744 \uc77c\uc815\ud55c \uac70\ub9ac\ub9cc\ud07c \ubc00\uc5b4\uc11c \ub2e4\ub978 \uc54c\ud30c\ubcb3\uc73c\ub85c \uce58\ud658\ud558\ub294 \ubc29\uc2dd\uc774\ub2e4. \u00a0\uc608\ub97c \ub4e4\uc5b4 3\uae00\uc790\uc529 \ubc00\uc5b4\ub0b4\ub294 \uce74\uc774\uc0ac\ub974 \uc554\ud638\ub85c ‘COME TO ROME’\uc744 \uc554\ud638\ud654\ud558\uba74 ‘FRPH WR URPH’\uac00 \ub41c\ub2e4. \uc5ec\uae30\uc11c \ubc00\uc5b4\ub0b4\ub294 \uae00\uc790 \uc218\ub294 \uc554\ud638\ub97c \ubcf4\ub0b4\ub294 \uc0ac\ub78c\uacfc \ud568\uaed8 \uc815\ud574 \ub354 \uc5b4\ub824\uc6b4 \uc554\ud638\ub97c \ub9cc\ub4e4 \uc218 \uc788\ub2e4.<\/span><\/p>\n

    \"\"<\/a>\ucf54\ud2c0\ub9b0\uc73c\ub85c \uc791\uc131\ud55c \uc2dc\uc800 \uc54c\uace0\ub9ac\uc998\uc740 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/span><\/p>\n

    class CaesarCipher(private val shiftCount: Int = 3) : Cipher {\r\n    override fun encrypt(plainText: String): String {\r\n        var result = StringBuffer()\r\n        for (i in plainText.indices) {\r\n            var char: Char = plainText.elementAt(i)\r\n            if (Character.isLowerCase(char)) {\r\n                char = 'a' + (char - 'a' + shiftCount) % 26\r\n            } else if (Character.isUpperCase(char)) {\r\n                char = 'A' + (char - 'A' + shiftCount) % 26\r\n            }\r\n            result.append(char)\r\n        }\r\n        return result.toString()\r\n    }\r\n\r\n    override fun decrypt(cipherText: String): String {\r\n        var result = StringBuffer()\r\n        for (i in cipherText.indices) {\r\n            var char: Char = cipherText.elementAt(i)\r\n            if (Character.isLowerCase(char)) {\r\n                char = 'z' + (char - 'z' - shiftCount) % 26\r\n            } else if (Character.isUpperCase(char)) {\r\n                char = 'Z' + (char - 'Z' - shiftCount) % 26\r\n            }\r\n            result.append(char)\r\n        }\r\n        return result.toString()\r\n    }\r\n}<\/pre>\n
    \ud558\uc9c0\ub9cc \uc2dc\uc800\uc554\ud638\ub294 \ube48\ub3c4 \ubd84\uc11d\ubc95\uc744 \ud1b5\ud574 \uc27d\uac8c \ud480 \uc218 \uc788\ub2e4\ub294 \ub2e8\uc810\uc774 \uc788\ub2e4.<\/p>\n
    \uc5ec\ub2f4\uc774\uc9c0\ub9cc, \uc2e4\uc81c\ub85c \uce74\uc774\uc0ac\ub974\ub294 \ud68c\uc758 \ucc38\uc11d\uc804\uc5d0\u00a0RUSQHUVKBVEHQIIQIYDQJEH\uc774\ub77c\ub294 \uc554\ud638\ub97c \ubc1b\uc558\uace0, \ud574\ub3c5\ud558\uba74 \uc554\uc0b4\uc790\ub97c \uc870\uc2ec\ud574\ub77c(BECAREFULFORASSASINATOR)\ub77c\ub294 \ub73b\uc774 \ub41c\ub2e4. \ud558\uc9c0\ub9cc \uc554\uc0b4\uc790\uac00 \ub204\uad70\uc9c0\ub294 \uc54c \uc218 \uc5c6\uc5c8\uace0 \ud68c\uc758\uc5d0 \ucc38\uc11d\ud558\ub294 \uac83\uc744 \uac15\ud589\ud588\ub2e4. \uacb0\uad6d \ubbff\uc5c8\ub358 \ube0c\ub8e8\ud22c\uc2a4\uc5d0\uac8c \uce7c\uc744 \ub9de\uac8c \ub418\uace0 \uc774\ub54c \uadf8 \uc720\uba85\ud55c “\ube0c\ub8e8\ud22c\uc2a4 \ub108\ub9c8\uc800..” \ub77c\ub294 \ub9d0\uc744 \ub0a8\uae30\uace0 \uc8fd\uc2b5\ub2c8\ub2e4. \uc2e4\uc81c\ub85c \ud55c \ub9d0\uc774 \uc544\ub2c8\ub77c\ub294\uac8c \uc815\uc124\uc774\uc9c0\ub9cc \uc6cc\ub099 \uc720\uba85\ud55c \uc138\uc775\uc2a4\ud53c\uc5b4\uac00 \uc4f4 \ud76c\uace1 “\uc904\ub9ac\uc5b4\uc2a4 \uc2dc\uc800”\uc758 \ub300\uc0ac\ub2e4.<\/span><\/p>\n
    \ube44\uc988\ub124\ub974 \uc554\ud638(Vigenere cipher)<\/h3>\n
    \uc2dc\uc800\uc554\ud638\ub97c \uac1c\uc120\ud55c \uc554\ud638\uac00 \ube44\uc988\ub124\ub974 \uc554\ud638\ub2e4. 16\uc138\uae30\uc5d0 \uc9c0\uc624\ubc18 \ubc14\ud2f0\uc2a4\ud0c0 \ubca8\ub77c\uc18c\ub77c\ub294 \uc774\ud0dc\ub9ac \uc0ac\ub78c\uc774 \ub9cc\ub4e4\uc5c8\ub2e4. \ube44\uc988\ub124\ub974 \uc554\ud638\ub294 \uc2dc\uc800 \uc554\ud638\ub791 \ube44\uc2b7\ud558\uc9c0\ub9cc \uae00\uc790\ub97c \ubb34\uc870\uac74 3\uce78 \uc774\ub3d9 \ud558\ub294 \uac83\uc774 \uc544\ub2c8\ub77c \ubb38\uc790\uc5f4\uc744 \ud0a4\ub85c \uac16\ub294\ub2e4. \uc608\ub97c\ub4e4\uc5b4 CAN\uc774\ub77c\ub294 \ud0a4\uac00 \uc788\ub2e4\uba74 \uac01 \uc54c\ud30c\ubcb3\uc758 \uc21c\uc11c\ub294 C(2) , A(0), N(13) \uc774\ubbc0\ub85c \ud3c9\ubb38\uc758 \uae00\uc790\ub4e4\uc744 \uc21c\uc11c\ub300\ub85c \uc21c\ud658\ud558\uba70 2,0,13 \uc790\ub9ac \uc774\ub3d9\ud558\uac8c \ub41c\ub2e4.\u00a0<\/p>\n
    \ub9cc\uc57d Hello\ub77c\ub294 \ubb38\uc790\uc5f4\uc5d0 CAN\uc774\ub77c\ub294 Key\ub97c \uc801\uc6a9\ud55c \ube44\uc988\ub124\ub974 \uc554\ud638\ud654\ub97c \uc801\uc6a9\ud558\uba74 Jeyno\ub77c\ub294 \ubb38\uc790\uc5f4\uc774 \ub3c4\ucd9c\ub41c\ub2e4.<\/p>\n
    \uc554\ud638\ud654\uc640 \ubcf5\ud638\ud654\ub97c \uc704\ud574 \ubcf4\ud1b5 \ub2e4\uc74c\uacfc \uac19\uc740 \ube44\uc988\ub124\ub974\ud45c\ub97c \uc0ac\uc6a9\ud55c\ub2e4.<\/p>\n
    \"\"<\/a>\ube44\uc988\ub124\ub974 \uc554\ud638\ud654 \uc54c\uace0\ub9ac\uc998\uc744 \ucf54\ud2c0\ub9b0\uc73c\ub85c \uc791\uc131\ud558\uba74 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n
    class VigenereCipher(private val key: String) : Cipher {\r\n    override fun encrypt(plainText: String): String {\r\n        val result = StringBuffer()\r\n        var keyCharIndex = 0\r\n        for (i in plainText.indices) {\r\n            var char = plainText[i]\r\n            if (Character.isLetter(char)) {\r\n                char = if (Character.isUpperCase(char)) {\r\n                    val shiftCount = key.elementAt(keyCharIndex).toUpperCase().toInt()\r\n                    ((char.toInt() + shiftCount - (2 * 'A'.toInt())) % 26 + 'A'.toInt()).toChar()\r\n                } else {\r\n                    val shiftCount = key.elementAt(keyCharIndex).toLowerCase().toInt()\r\n                    ((char.toInt() + shiftCount - (2 * 'a'.toInt())) % 26 + 'a'.toInt()).toChar()\r\n                }\r\n                keyCharIndex = ++keyCharIndex % key.length\r\n            }\r\n            result.append(char)\r\n        }\r\n        return result.toString()\r\n    }\r\n\r\n    override fun decrypt(cipherText: String): String {\r\n        val result = StringBuffer()\r\n        var keyCharIndex = 0\r\n        for (i in cipherText.indices) {\r\n            var char: Char = cipherText[i]\r\n            if (Character.isLetter(char)) {\r\n                char = if (Character.isUpperCase(char)) {\r\n                    val shiftCount = key.elementAt(keyCharIndex).toUpperCase().toInt()\r\n                    'A' + ((char - shiftCount + 26).toInt() % 26)\r\n                } else {\r\n                    val shiftCount = key.elementAt(keyCharIndex).toLowerCase().toInt()\r\n                    'a' + ((char - shiftCount + 26).toInt() % 26)\r\n                }\r\n                keyCharIndex = ++keyCharIndex % key.length\r\n            }\r\n            result.append(char)\r\n        }\r\n        return result.toString()\r\n    }\r\n\r\n}<\/pre>\n
    \ube44\uc988\ub124\ub974 \uc554\ud638\uac00 \uc2dc\uc800 \uc554\ud638\ubcf4\ub2e4 \ud6e8\uc52c \uc548\uc804\ud558\uc9c0\ub9cc \uadf8\ub798\ub3c4 \uc554\ud638\ub97c \uae68\ub07c\ub294 \uc27d\ub2e4. \uc554\ud638\ud654\ub41c \ubb38\uc790\uc5f4\uc5d0\uc11c \ub4f1\uc7a5\ud558\ub294 \ubc18\ubcf5\ub418\ub294 \ubb38\uc790\uc5f4\uc744 \ud1b5\ud574 \ud0a4\uc758 \uac1c\uc218\ub97c \ucd94\ub860\ud558\uace0, \uadf8 \uc774\ud6c4 \ube48\ub3c4\ubd84\uc11d\uc744 \ud1b5\ud574 \uc2e4\uc81c \ud0a4\ub97c \ud655\uc815\ud560 \uc218 \uc788\ub2e4. \uc554\ud638\ub85c\uc11c\ub294 \ube44\uad50\uc801 \uc57d\ud55c \ud3b8\uc774\uc9c0\ub9cc \uadf8 \uc2dc\uc808\uc5d0 \uc0ac\uc6a9\ud558\uae30\uc5d0\ub294 \ubcf4\uc548\uc131\uc774 \ucda9\ubd84\ud588\ub2e4.<\/p>\n
     <\/p>\n","protected":false},"excerpt":{"rendered":"
    \uace0\uc804\uc554\ud638 \uace0\uc804\uc554\ud638(Classical cipher)\ub294 \uacfc\uac70\uc5d0 \uc0ac\uc6a9\ub418\uc5c8\uc73c\ub098 \uc9c0\uae08\uc740 \uc0ac\uc6a9\ud558\uc9c0 \uc54a\ub294 \uc554\ud638\uc758 \ud615\ud0dc\uc774\ub2e4. \uc9c0\uae08\uc740 \ucef4\ud4e8\ud130\ub85c \ube44\ud2b8\ub97c \ub2e4\ub8e8\ub294 \uc554\ud638\ub97c \uc0ac\uc6a9\ud558\uc9c0\ub9cc \uacfc\uac70\uc5d0\ub294 \uc0ac\ub78c\uc774 \uc554\ud638\ud654\uc640 \ubcf5\ud638\ud654\ub97c \ud574\uc57c\ud588\uae30 \ub54c\ubb38\uc5d0 \uace0\uc804\uc554\ud638\ub294 \uc624\ub298\ub0a0\uc758 \uc554\ud638\ubcf4\ub2e4 \ud6e8\uc52c \ub2e8\uc21c\ud558\ub2e4.\u00a0 \uace0\uc804\uc554\ud638\uc5d0\uc11c \uac00\uc7a5 \ub300\ud45c\uc801\uc778 \uc2a4\ud0a4\ud14c\uc77c \uc554\ud638, \uc2dc\uc800 \uc554\ud638, \ube44\uc988\ub124\ub974 \uc554\ud638\uc5d0 \ub300\ud574\uc11c \uc54c\uc544\ubcf4\uc790. \uc2a4\ud0a4\ud14c\uc77c \uc554\ud638(Scytale cipher) \uace0\ub300 \uadf8\ub9ac\uc2a4\uc758 \uc5ed\uc0ac\ud559\uc790 \ud50c\ub8e8\ud0c0\ub974\ud06c\uc5d0 \ub530\ub974\uba74 \uc57d 2,500\ub144 \uc804 \uadf8\ub9ac\uc2a4 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"inline_featured_image":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"categories":[16],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/44207"}],"collection":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=44207"}],"version-history":[{"count":1,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/44207\/revisions"}],"predecessor-version":[{"id":44211,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/44207\/revisions\/44211"}],"wp:attachment":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=44207"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=44207"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=44207"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}