[Nsi-wg] Question about message attrbutes..

[Jerry Sobieski]

John - this may be for you...

In reviewing this issue on the RA/PA... I went looking at the UML doc 
Guy circulated as it is a bit easier to read than the raw WSDL...

The messages all have the requesterNSAID and the providerNSAID fields, 
directly folowed by the "sessionSecurityID".   This is the only field I 
see for security attributes.

I thought our conclusion was that there would be two security layers: a 
NSA _/session/_ level authentication/authorization credentials, and a 
/_request_/ level authorization credential that would authorize the 
particular action requested relative to the resource or information 
context of the request.  Does this sessionSecirity field do double duty 
authenticating the remote NSA *and* authorizing the particular service 
request?

I trust the MTL to authenticate the messaging, as the NSI layer should 
never see messages from an unauthenticated NSA.   But the NSI layer does 
need the authorization credentials in order to properly evaluate the 
primitive... The authorization of an NSI request is not an MTL 
function.   So I am just a bit unsure how this field is planned to be 
used within the WSDL.

Thoughts/Comments?
Jerry
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