2.7.6 Protocol between Credentials and Privacy Negotiation Agent and Service

The protocol to realise the credentials and privacy negotiation functionality has yet to be finalised. Candidate protocols are:

1. the one used by TrustBuilder 2 [TrustBuilder2]

2. one based on the Web Service Profile of XACML [Anderson07] as enhanced by [Mbanaso09]

3. one based on an enhanced Liberty Discovery Service [Disco2]

Whichever protocol is finally chosen it must be able to support a ceremony to gaining incremental levels of mutual trust. The Web GUI of the Front End MUST support the ceremony.