MSO and multiple communities

[Tony Linde]

Is there any reason why we would want to implement MSO? 

To my mind it adds nothing that cannot be achieved with groups since anyone
can be made a member of a group regardless of the community to which they
first registered. And it introduces the complexity of trying to recognise
where multiple accounts belong to the same person and reconciling the
privileges associated with each account.

There won't be anything to stop a person having more than one account but if
they do so they can only use the privileges associated with their sign-on
account - under SSO that is. I suppose that if there is a later need for MSO
recognised then it is something that can be added onto the VObs standards.
But if we implement MSO, there'll be no going back to SSO - and it'll take a
lot more to design it right and get it working I would have thought.

Can anyone think of use cases which demonstrate an advantage to MSO?

> to federate communities and to allow 
> credentials for an SSO session to be collected from more than 
> one server.

How do these relate to SSO vs MSO? (My apologies if these have already been
discussed - I've been tied up recently - point me at past threads if so.)

Cheers,
Tony. 

> -----Original Message-----
> From: owner-grid at eso.org [mailto:owner-grid at eso.org] On 
> Behalf Of Guy Rixon
> Sent: 06 July 2004 12:17
> To: grid at ivoa.net
> Subject: MSO and multiple communities
> 
> In light of Tony's last message, I ask the group whether we 
> are to proceed with the abilities to have accounts at more 
> than one community, to federate communities and to allow 
> credentials for an SSO session to be collected from more than 
> one server. If not, then the nature of the system is changed; 
> some processes are simplified and some are made impossible.
> 
> I don't mind changing tack if there is consensus, but I need 
> to know which way we're going before I finish the SSO document-set.
> 
> Cheers,
> Guy
> 
> Guy Rixon 				        gtr at ast.cam.ac.uk
> Institute of Astronomy   	                Tel: +44-1223-337542
> Madingley Road, Cambridge, UK, CB3 0HA		Fax: 
> +44-1223-337523
>