If the program uses the same algorithm I don't see why not. Here is a module for Drupal that uses Google Authenticator: http://drupal.org/project/ga_login http:

If the program uses the same algorithm I don't see why not. Here is a module for Drupal that uses Google Authenticator: http://drupal.org/project/ga_login http://drupal.org/project/ga_login This seems to be the implementation it's using: http://code.google.com/p/ga4php/source/browse/trunk/lib/ga4php.php http://code.google.com/p/ga4php/source/browse/trunk/lib/ga4p... Edit: of course, this is just another implementation of the TOTP method. It does not use Google's infrastructure to send you SMS / voice calls containing the code.