Encrypt Decrypt in Node using crypto

crypto_test.js

var SecurityUtil = (function(key) {
	var crypto = require('crypto');
	var secret=new Buffer(key);
	var encrypt = function(text) {
		var cipher = crypto.createCipher('aes-256-cbc', secret);
		cipher.update(text, 'utf8', 'hex');
		var cipherText = cipher.final('hex');
		return cipherText;
	};

	var decrypt = function(encryptedText) {
	    try {
		  var decipher = crypto.createDecipher('aes-256-cbc', secret);
		  decipher.update(encryptedText, 'hex', 'utf8');
		  return decipher.final('utf8');	
		} catch (e) {
		  return undefined;
		}
	};
	return {
	  encrypt: encrypt,
	  decrypt: decrypt
	};
});


var util = SecurityUtil('some stuff to encrypt');
var encrypted = util.encrypt('test this out')
console.log(encrypted);
var original = util.decrypt(encrypted);
console.log(original);