[Zope] users and passwords

I'm thinking about using zope to manage a portal that I want to setup. The problem is that certain parts of the site will call for "non-zope" applications; possibilities include squirlmail and phpbb. What I'd like to know is whether it's possible to 'synchronize' or 'share' the authentication of logins and passwords between, say, zope and phpbb. Thank you inadvance -- G. Clifford Williams gcw-python@rezidew.net