Single Sign On (SSO) between Drupal and Joomla

Hi there,

I am currently running a drupal company website. A new community site will be created by Joomla. How the user profiles first migrated from drupal to Joomla, and second synchronized and single sign on from main drupal site to a Joomla community site? Any plugins can do the SSO?

Thanks in advanced.


Drupal version: