POLICY ADAPTATION AND EXCHANGE
IN TRUST NEGOTIATION
Policy-driven negotiation allows parties to iteratively communicate, increasing the level of knowledge on each other after each iteration. This is crucial in e.g. access control in which disclosure of information may not be allowed till a specific level of trust has been reached. There exists several systems for Trust Negotiation like TrustBuilder or PeerTrust. The Protune language brings in many advantages like, among others, strong and lightweight evidence, policy filtering, explanations and integration of legacy systems.