J-Crypto

This package was developed to enable programmers to encode and decode messages using a numerical cipher method.

installing J-Crypto

npm i j-crypto-change

Example for Caesar (Shift) Cipher

const { encode, decode, createCipher } = require("j-crypto-change");

encode("hello"); // "khoor" decode("khoor"); // "hello" const cipher = createCipher(5); console.log(cipher.encode("hello")); // "mjqqt" cipher.decode("mjqqt"); // "hello"

Playfair

const { playfairEncode, playfairDecode } = require('./playfair'); playfairEncode("HELLO", "KEY"); // "DAVVRO" (varies by key) playfairDecode("DAVVRO", "KEY"); // "HELXLO" (X is padding)

Frequency Analysis

const { frequencyAnalysis } = require("j-crypto");

const result = frequencyAnalysis("khoor zruog");