Little Secret protected text encoder/decoder

This is a lightweight text encoder that encodes UTF-8 text using a secret key and stores the result as Base64-encoded ASCII text. It makes use of TextEncoder web API which may not be supported by some older browsers. See https://developer.mozilla.org/en-US/docs/Web/API/TextEncoder for details.

NOTE: This encoder is NOT intended to be used for cryptography purposes ;)

Usage

• Link lscoder.js (or lscoder.min.js) to a web page using a script tag;

• Provide locally handled input for the secret key to manage data coming from/to the server only on the client side.

• Encode data before uploading to the server and decode upon downloading back to the client.

    <script src="lscoder.js"></script>
    <script>
      var secret = "my secret key 😎";
      var Coder = new LittleSecret(secret);
      var originalText = "A text to encode, so nobody 👀 this 💩.";
      var encodedText = Coder.encode(originalText);
      var decodedText = Coder.decode(encodedText);
  
      console.log(encodedText); // RipuMGk6IXJhg5PavzstMWc9ZTETDOJILRa93YKe7HTZdGVPpDxvaGh+IQ==
      console.log(decodedText === originalText); // true
    </script>
  

Examples

Use test.html to test LittleSecret in browser without server-side back-end.

"Secret Notes" PHP demo application in demo.php might give you more clues about how and why to use this thing.