How to convert to string and back again with CryptoJs

var encrypted = CryptoJS.AES.encrypt(jsonStr, 'youngunicornsrunfree', { format: JsonFormatter });

//convert encrypted to a string for transfer
//convert string back to Crypto object so it can be decrypted.

var decrypted = CryptoJS.AES.decrypt(encrypted, "youngunicornsrunfree", { format: JsonFormatter });
var encrypted = CryptoJS.AES.encrypt(jsonStr, '