Take a look through the most frequently asked questions. If you still have questions about this plugin, feel free to contact us.
The configuration is stored in a file at wp-content/gf_encryption_configuration.php
You should keep a copy of this file backed up somewhere. If you ever lose the key that is stored in it then there is no way to decrypt your data.
Yes, Gravity Forms Encryption works with WordPress Multisite. The only limitation at this time is the same encryption key is used for all sites on the multisite.
AES 256 encryption is used with the openssl PHP extension to encrypted the data. It uses a 32 byte key as the encryption passprase.
Gravity Forms Encryption requires PHP 7.2 or later with the openssl PHP extension.