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Merge pull request #3759 from Markus-D-M/contracts_encryption
MISC Two new encryption themed contracts - caesar and vigenere
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@ -370,3 +370,35 @@ The list contains the name of (i.e. the value returned by
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| | | aaaaaaaaaaaaa -> 1a91031 |
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| | | aaaaaaaaaaaaaa -> 1a91041 |
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+-----------------------------------------+------------------------------------------------------------------------------------------+
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| Encryption I: Caesar Cipher | | Caesar cipher is one of the simplest encryption technique. It is a type of |
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| | | substitution cipher in which each letter in the plaintext is replaced by a letter some |
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| | | fixed number of positions down the alphabet. For example, with a left shift of 3, D |
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| | | would be replaced by A, E would become B, and A would become X (because of rotation). |
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| | | You are given an array with two elements.The first element is the plaintext, the |
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| | | second element is the left shift value. Return the ciphertext as uppercase string. |
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| | | Spaces remains the same. |
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+-----------------------------------------+------------------------------------------------------------------------------------------+
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| Encryption II: Vigenère Cipher | | Vigenère cipher is a type of polyalphabetic substitution. It uses the Vigenère square |
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| | | to encrypt and decrypt plaintext with a keyword. |
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| | | Vignenère square: |
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| | | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z |
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| | | +---------------------------------------------------- |
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| | | A | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z |
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| | | B | B C D E F G H I J K L M N O P Q R S T U V W X Y Z A |
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| | | C | C D E F G H I J K L M N O P Q R S T U V W X Y Z A B |
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| | | D | D E F G H I J K L M N O P Q R S T U V W X Y Z A B C |
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| | | E | E F G H I J K L M N O P Q R S T U V W X Y Z A B C D |
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| | | ... |
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| | | Y | Y Z A B C D E F G H I J K L M N O P Q R S T U V W X |
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| | | Z | Z A B C D E F G H I J K L M N O P Q R S T U V W X Y |
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| | | For encryption each letter of the plaintext is paired with the corresponding letter of |
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| | | a repeating keyword. For example, the plaintext DASHBOARD is encrypted with the |
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| | | keyword LINUX: |
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| | | Plaintext: DASHBOARD |
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| | | Keyword: LINUXLINU |
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| | | So, the first letter D is paired with the first letter of the key L. Therefore, row D |
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| | | and column L of the Vigenère square are used to get the first cipher letter O. This |
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| | | must be repeated for the whole ciphertext. |
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| | | You are given an array with two elements. The first element is the plaintext, the |
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| | | second element is the keyword. Return the ciphertext as uppercase string. |
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+-----------------------------------------+------------------------------------------------------------------------------------------+
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@ -1653,4 +1653,236 @@ export const codingContractTypesMetadata: ICodingContractTypeMetadata[] = [
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return comprLZDecode(ans) === plain && ans.length <= comprLZEncode(plain).length;
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},
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},
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{
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desc: (data: [string, number]): string => {
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return [
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"Caesar cipher is one of the simplest encryption technique.",
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"It is a type of substitution cipher in which each letter in the plaintext ",
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"is replaced by a letter some fixed number of positions down the alphabet.",
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"For example, with a left shift of 3, D would be replaced by A, ",
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"E would become B, and A would become X (because of rotation).\n\n",
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"You are given an array with two elements:\n",
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` ["${data[0]}", ${data[1]}]\n`,
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"The first element is the plaintext, the second element is the left shift value.\n\n",
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"Return the ciphertext as uppercase string. Spaces remains the same.",
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].join(" ");
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},
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difficulty: 1,
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gen: (): [string, number] => {
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// return [plaintext, shift value]
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const words = [
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"ARRAY",
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"CACHE",
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"CLOUD",
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"DEBUG",
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"EMAIL",
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"ENTER",
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"FLASH",
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"FRAME",
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"INBOX",
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"LINUX",
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"LOGIC",
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"LOGIN",
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"MACRO",
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"MEDIA",
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"MODEM",
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"MOUSE",
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"PASTE",
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"POPUP",
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"PRINT",
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"QUEUE",
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"SHELL",
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"SHIFT",
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"TABLE",
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"TRASH",
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"VIRUS",
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];
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return [
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words
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.sort(() => Math.random() - 0.5)
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.slice(0, 5)
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.join(" "),
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Math.floor(Math.random() * 25 + 1),
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];
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},
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name: "Encryption I: Caesar Cipher",
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numTries: 10,
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solver: (data: [string, number], ans: string): boolean => {
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// data = [plaintext, shift value]
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// build char array, shifting via map and join to final results
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const cipher = [...data[0]]
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.map((a) => (a === " " ? a : String.fromCharCode(((a.charCodeAt(0) - 65 - data[1] + 26) % 26) + 65)))
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.join("");
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return cipher === ans;
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},
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},
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{
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desc: (data: [string, string]): string => {
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return [
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"Vigenère cipher is a type of polyalphabetic substitution. It uses ",
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"the Vigenère square to encrypt and decrypt plaintext with a keyword.\n\n",
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" Vignenère square:\n",
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" A B C D E F G H I J K L M N O P Q R S T U V W X Y Z \n",
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" +----------------------------------------------------\n",
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" A | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z \n",
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" B | B C D E F G H I J K L M N O P Q R S T U V W X Y Z A \n",
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" C | C D E F G H I J K L M N O P Q R S T U V W X Y Z A B\n",
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" D | D E F G H I J K L M N O P Q R S T U V W X Y Z A B C\n",
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" E | E F G H I J K L M N O P Q R S T U V W X Y Z A B C D\n",
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" ...\n",
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" Y | Y Z A B C D E F G H I J K L M N O P Q R S T U V W X\n",
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" Z | Z A B C D E F G H I J K L M N O P Q R S T U V W X Y\n\n",
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"For encryption each letter of the plaintext is paired with the corresponding letter of a repeating keyword.",
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"For example, the plaintext DASHBOARD is encrypted with the keyword LINUX:\n",
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" Plaintext: DASHBOARD\n",
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" Keyword: LINUXLINU\n",
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"So, the first letter D is paired with the first letter of the key L. Therefore, row D and column L of the ",
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"Vigenère square are used to get the first cipher letter O. This must be repeated for the whole ciphertext.\n\n",
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"You are given an array with two elements:\n",
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` ["${data[0]}", "${data[1]}"]\n`,
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"The first element is the plaintext, the second element is the keyword.\n\n",
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"Return the ciphertext as uppercase string.",
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].join(" ");
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},
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difficulty: 2,
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gen: (): [string, string] => {
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// return [plaintext, keyword]
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const words = [
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"ARRAY",
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"CACHE",
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"CLOUD",
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"DEBUG",
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"EMAIL",
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"ENTER",
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"FLASH",
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"FRAME",
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"INBOX",
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"LINUX",
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"LOGIC",
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"LOGIN",
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"MACRO",
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"MEDIA",
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"MODEM",
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"MOUSE",
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"PASTE",
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"POPUP",
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"PRINT",
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"QUEUE",
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"SHELL",
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"SHIFT",
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"TABLE",
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"TRASH",
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"VIRUS",
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];
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const keys = [
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"ALGORITHM",
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"BANDWIDTH",
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"BLOGGER",
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"BOOKMARK",
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"BROADBAND",
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"BROWSER",
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"CAPTCHA",
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"CLIPBOARD",
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"COMPUTING",
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"COMMAND",
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"COMPILE",
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"COMPRESS",
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"COMPUTER",
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"CONFIGURE",
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"DASHBOARD",
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"DATABASE",
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"DESKTOP",
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"DIGITAL",
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"DOCUMENT",
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"DOWNLOAD",
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"DYNAMIC",
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"EMOTICON",
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"ENCRYPT",
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"EXABYTE",
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"FIREWALL",
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"FIRMWARE",
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"FLAMING",
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"FLOWCHART",
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"FREEWARE",
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"GIGABYTE",
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"GRAPHICS",
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"HARDWARE",
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"HYPERLINK",
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"HYPERTEXT",
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"INTEGER",
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"INTERFACE",
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"INTERNET",
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"ITERATION",
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"JOYSTICK",
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"JUNKMAIL",
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"KEYBOARD",
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"KEYWORD",
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"LURKING",
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"MACINTOSH",
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"MAINFRAME",
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"MALWARE",
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"MONITOR",
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"NETWORK",
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"NOTEBOOK",
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"COMPUTER",
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"OFFLINE",
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"OPERATING",
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"PASSWORD",
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"PHISHING",
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"PLATFORM",
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"PODCAST",
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"PRINTER",
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"PRIVACY",
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"PROCESS",
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"PROGRAM",
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"PROTOCOL",
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"REALTIME",
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"RESTORE",
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"RUNTIME",
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"SCANNER",
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"SECURITY",
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"SHAREWARE",
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"SNAPSHOT",
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"SOFTWARE",
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"SPAMMER",
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"SPYWARE",
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"STORAGE",
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"TERMINAL",
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"TEMPLATE",
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"TERABYTE",
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"TOOLBAR",
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"TYPEFACE",
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"USERNAME",
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"UTILITY",
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"VERSION",
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"VIRTUAL",
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"WEBMASTER",
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"WEBSITE",
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"WINDOWS",
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"WIRELESS",
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"PROCESSOR",
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];
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return [
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words
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.sort(() => Math.random() - 0.5)
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.slice(0, 5)
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.join(""),
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keys.sort(() => Math.random() - 0.5)[0],
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];
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},
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name: "Encryption II: Vigenère Cipher",
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numTries: 10,
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solver: (data: [string, string], ans: string): boolean => {
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// data = [plaintext, keyword]
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// build char array, shifting via map and corresponding keyword letter and join to final results
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const cipher = [...data[0]]
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.map((a, i) => {
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return a === " "
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? a
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: String.fromCharCode(((a.charCodeAt(0) - 2 * 65 + data[1].charCodeAt(i % data[1].length)) % 26) + 65);
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})
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.join("");
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return cipher === ans;
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},
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},
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];
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