To pre-fill a registration form with data from the URL, you need to first encrypt the data.

When you select the registration addon, you will see a tab marked Decryption. Here, you can activate OpenSSL encryption and enter a Cipher. We suggest the use of AES-256-CBC - but another alternative exists as well: AES-128-CBC.

You will then set a Key and IV. The encrypted value has to be base64 encoded. An example of an encryption that works (in PHP):

<?php
$email = 'test@playable.com';

$key = '727AD2941DE192C6';
$iv = '0DE42A46774D10DA';

After choosing the cipher and inserting the key and IV, will enable encryption on the form fields that should be filled by the decrypted values.

You do this by modifying the field and selecting ‘Activate decryption’. After selecting this option, you will see how the data should be formatted.

In the example below, the email field should be sent as a query parameter to the campaign:

?email=encrypted_value_here

In this example, your URL structure would look like this:

$encrypted_email = openssl_encrypt($email, 'AES-256-CBC', $key, 0, $iv);

$query_string = '?email=' . urlencode($encrypted_email);

Things you need to be aware of when setting up the encryption are that:

Example:
​
​Raw: 7HZasofjh0YCS+PQ/qp6qoA24fowiVXBJpyrr1aseFs=
​Encoded: 7HZasofjh0YCS%2BPQ%2Fqp6qoA24fowiVXBJpyrr1aseFs%3D