Privilege negotiation agents for distributed authorisation on World Wide Web

Privilege negotiation agents migrate from the security servers of different administrative domains on the Internet to the user´s secure client agent environment. They work cooperatively for trust establishment and authorisation in an automated way. Agent communication protocols are expressed through the Knowledge Query and Manipulation Language (KQML). Security issues for interaction between agents are discussed. The user-centred approach enables a user to enforce his own privacy policies during the privilege negotiation process.