insequur

A very simple cipher module. I wanted to learn a bit about the Caesar cipher and basic substitution ciphers, and this is the result.

Goes without saying, but this is not to be used for any serious security.

Only supports the following characters:

abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_-+=/

install

npm i insequur
# or
yarn add insequur

usage

const Cipher = require('insequur');
const cipher = new Cipher('mySuperSecretKey');

// The message we wish to make secret
const message = 'Here be a message';

// Encode the string using our cipher
const encodedMessage = cipher.encode(message);

// We get back an encrypted string
console.log(encodedMessage) // => 'TC9yofvRebDiL2eEq'

// Decode that encrypted string with the correct cipher
const decodedMessage = cipher.decode(encodedMessage);

// The message is readable
console.log(decodedMessage) // => 'Here be a message';

// Now let's try to decode with the wrong cipher secret
const wrongCipher = new Cipher('theWrongKey');

// We don't get our original result back.
console.log(wrongCipher.decode(encodedMessage)); // => 'Av5S=7iLK=f5EYync'