A Comprehensive XML Based Approach to Trust Negotiations 109 Copyright © 2005, Idea Group Inc. Copying or distributing in print or electronic forms without written permission of Idea Group Inc. is prohibited. Chapter VI A Comprehensive XML Based Approach to Trust Negotiations Elisa Bertino, Purdue University, USA Elena Ferrari, Università degli Studi dell‘Insubria, Italy Anna Cinzia Squicciarini, Università degli Studi di Milano, Italy Abstract Trust negotiation is a promising approach for establishing trust in open systems like the Internet, where sensitive interactions may often occur between entities at first contact, with no prior knowledge of each other. In this chapter we present Trust- X, a comprehensive XML-based XML framework for trust negotiations, specifically conceived for a peer-to-peer environment. We also discuss the applicability of trust negotiation principles to mobile commerce. We introduce a variety of possible approaches to extend and improve Trust-X in order to fully support mobile commerce transactions and payments. In the chapter, besides presenting the Trust-X system, we present the basic principles of trust negotiation. This chapter appears in the book, Advances in Security and Payment Methods for Mobile Commerce, edited by Wen-Chen Hu, Chung-wei Lee and Weidong Kou. Copyright © 2005, Idea Group Inc. Copying or distributing in print or electronic forms without written permission of Idea Group Inc. is prohibited. 701 E. Chocolate Avenue, Suite 200, Hershey PA 17033-1240, USA Tel: 717/533-8845; Fax 717/533-8661; URL-http://www.idea-group.com 16*#%! IDEA GROUP PUBLISHING