A pair of cipher algorithms.
This is a simple set of functions to generate a private key, encrypt a string, and decrypt a string based on a specified alphabet composed of key value pairs using a shift cipher. The alphabet must only use keys one character in length in this implementation.
This function randomly generates and returns a valid private key integer based on a specified alphabet length, [alphabetLength].
This function encrypts a string type variable, [string], using an integer type variable, [privateKey], and an object with key value pairs where each key is one character in length using a shift cipher.
This function encrypts a string type variable, [string], using an integer type variable, [privateKey], and an object with key value pairs where each key is one character in length using a shift cipher.
The following code will console log the unencrypted string, the private key which will be used in the shift cipher, the encrypted string, and the decrypted string. It uses a variable, alphabet, to define the alphabet of one length characters to be used by the cipher. In this case, the English alphabet.
var alphabet = {'a': 0, 'b': 1, 'c': 2, 'd': 3, 'e': 4, 'f': 5, 'g': 6, 'h': 7, 'i': 8, 'j': 9, 'k': 10, 'l': 11, 'm': 12, 'n': 13, 'o': 14, 'p': 15, 'q': 16, 'r': 17, 's': 18, 't': 19, 'u': 20, 'v': 21, 'w': 22, 'x': 23, 'y': 24, 'z': 25};
var demoString = 'unshifted';
var demoKey = privateKeyGenerator(Object.keys(alphabet).length);
var demoEncryptedString = encryptString(demoString, demoKey, alphabet);
var demoDecryptedString = decryptString(demoEncryptedString, demoKey, alphabet);
console.log('Unencrypted String: ' + demoString);
console.log('Private Key: ' + demoKey);
console.log('Encrypted String: ' + demoEncryptedString);
console.log('Decrypted String: ' + demoDecryptedString);
This is a simple set of functions to generate a private key, encrypt a string, and decrypt a string based on a specified alphabet composed of key value pairs using a vigenère cipher. The alphabet must only use keys one character in length in this implementation.
This function randomly generates and returns a valid private key string of a specified integer length, [length], composed of characters in the specified alphabet, [alphabet].
This function encrypts a string type variable, [string], using a string type variable, [privateKey], and an object with key value pairs where each key is one character in length using a vigenère cipher.
This function encrypts a string type variable, [string], using an integer type variable, [privateKey], and an object with key value pairs where each key is one character in length using a vigenère cipher.
The following code will console log the unencrypted string, the private key which will be used in the vigenère cipher, the encrypted string, and the decrypted string. It uses a variable, alphabet, to define the alphabet of one length characters to be used by the cipher. In this case, the English alphabet.
var alphabet = {'a': 0, 'b': 1, 'c': 2, 'd': 3, 'e': 4, 'f': 5, 'g': 6, 'h': 7, 'i': 8, 'j': 9, 'k': 10, 'l': 11, 'm': 12, 'n': 13, 'o': 14, 'p': 15, 'q': 16, 'r': 17, 's': 18, 't': 19, 'u': 20, 'v': 21, 'w': 22, 'x': 23, 'y': 24, 'z': 25};
var demoString = 'unshifted';
var demoKey = privateKeyGenerator(alphabet, demoString.length);
var demoEncryptedString = encryptString(demoString, demoKey, alphabet);
var demoDecryptedString = decryptString(demoEncryptedString, demoKey, alphabet);
console.log('Unencrypted String: ' + demoString);
console.log('Private Key: ' + demoKey);
console.log('Encrypted String: ' + demoEncryptedString);
console.log('Decrypted String: ' + demoDecryptedString);