Introduction Editor's Introduction i Feature Articles Developing Adaptive Auction Mechanisms David Pardoe and Peter Stone 1 Allocating Indivisible Goods Ivona Bezakova and Varsha Dani 11 Detection Tests for Identifying Violators of Multi-party Contracts Lai Xu, Manfred A. Jeusfeld, and Paul.W.P.J. Grefen 19 Certifying Authenticity via Fiber-Infused Paper Yuqun Chen, M. Kivanc Mihcak, and Darko Kirovski 29 A Server-mediated Peer-to-peer System S. H. Kwok, K. Y. Chan, and Y. M. Cheung 38 ISSN 1551-9031