jqueryencryptionserializationcryptography

Javascript encryption for JSON object

I have a JSON object that I generate from serializeArray on a form which I would like to encrypt. The application I am working on is intended to run only as a local file. What would be the best option for encrypting the data?

Solution

  • Just an idea. Use cryptoJS as suggested in this sample: 

    var secret = "My Secret Passphrase";
var plainText = "the brown fox jumped over the lazy dog";
var encrypted = CryptoJS.AES.encrypt(plainText, secret);
var decrypted = CryptoJS.AES.decrypt(encrypted, secret);

document.getElementById("m1").innerHTML = encrypted;
document.getElementById("m2").innerHTML = decrypted;
document.getElementById("m3").innerHTML = decrypted.toString(CryptoJS.enc.Utf8);
    <script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.2/rollups/aes.js"></script>
<label>encrypted</label>
<div id="m1"></div>
<br>
<label>decrypted</label>
<div id="m2"></div>
<br>
<label>Original message</label>
<div id="m3"></div>

    and encrypt all your data before placing it in localstorage. I do not see how you can implement this beside asking some sort of password from the user.