The file encrypt module allows you to encrypt files uploaded via Drupal using the encrypt and key modules. When the files are requested, they'll get decrypted automatically.

Ideally first configure a different path at which the encrypted files should be stored. Similar to private files you need an entry in settings.php for that:

$settings['encrypted_file_path'] = '';

The next step is to go to your file/image field settings and click on "field settings". Under upload destination choose 'Encrypted files'.

For encrypting metadata like title and description use the field_encrypt method. @TODO

@TODO