Privacy and anonymity in Trust Negotiations.

Nov 09, 2005

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Abstract

Trust negotiation is an emerging approach for establishing trust in open
systems, where sensitive interactions may often occur between entities with
no prior knowledge of each other. Although several proposals today exist of
systems for the management of trust negotiation, none of them provides a
comprehensive approach to the problem of privacy preservation. Trust
negotiation systems, however, by their very nature may represent a threat to
privacy. Credentials, exchanged during negotiations, often contain sensitive
personal information that thus needs to be selectively released. As we
believe that trust negotiation systems must effectively address privacy
issues to be widely acceptable, we have investigated privacy in the context
of trust negotiations. In this talk, we will propose the main results
obtained so far in the area of trust negotiation as part of the Ph.D.
activity. We propose a set of privacy preserving features to be included in
any trust negotiation system, such as the support for the P3P standard, as
well as a number of innovative features such as a novel format to encode
digital credentials specifically designed for preserving privacy. Finally, we
illustrate techniques for supporting anonymous trust negotiations as part of
a privacy-preserving trust negotiations, to carry on trust negotiations
without revealing identity related information.