share identity between two web modules

[larry.vladechko.gmail.com]

is it possible to share identity between two web modules in one ear application?

For example I have two web modules in one enterprise application.
I have authenticated to first web module (with login and password).
Will identity be propagated to second web module? Or do I have to enter login and password again in second module?

[niox.nikospara.yahoo.com]

Googling for jboss single sign on provided this. It might be useful.

[jeanluc]

and search this forum for SSO.