Service Security and governance.

Hi Gurus,

I have two questions with respect to enterprise services for which i can't find any answers till now -

1. Is Single sign-own the only option for enabling security in enterprise services. If yes or no, how do we enable them.

2. Can we enable subscription and notification features for the SAP UDDI registry? I have seen those features in the configuration side, but how do we enable it?

Can some one guide me in these.

Thanks and Regards,

Aji.