This section addresses Req. D1.2-7.17-Increm.
Trust and Privacy Negotiation logistics and flows are subject to TAS3 research. A future version of this deliverable (D2.1 M30) will report on these mechanisms in detail.
To give rough overview, the Trust and Privacy Negotiation can be carried at two levels: on Front Channel a user interface (Web GUI of a Front End) will step user through sequence of mutually revealing more information until agreement can be reached and transaction can be completed. This may involve the user agreeing to relax policies on his data, or the Service Provider agreeing to honour some additional user policy that it did not offer originally. The second level is Trust and Privacy Negotiation in the back channel. The Discovery Service plays a large role in the Trust and Privacy Negotiation at this level. The mechanics are further described in [TAS3D41ID].