Sql authentication
Component type
Maintenance status
Development status
Component created
Component changed
SQL authentication is a module that uses the external authentication methods in Drupal to connect to any other database.
Whether that is a PHPbb MySQL database, or another drupal site in postgresql does not really matter. It is fully configurable and easy to use. Multiple hashing algorythms are supported too, configurable in the settings interface.
Its user-end system is similar to the drupalID, with one difference: your data will not go unencrypted over the big bad web.