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Friends for Free: Self-Organizing Artificial Social Networks for Trust and Cooperation Hales, David Arteconi, Stefano Evolution of cooperation Evolving Networks P2P Prisoner's Dilemma Tags By harvesting friendship networks from e-mail contacts or instant message "buddy lists" Peer-to-Peer (P2P) applications can improve performance in low trust environments such as the Internet. However, natural social networks are not always suitable, reliable or available. We propose an algorithm (SLACER) that allows peer nodes to create and manage their own friendship networks. We evaluate performance using a canonical test application, requiring cooperation between peers for socially optimal outcomes. The Artificial Social Networks (ASN) produced are connected, cooperative and robust - possessing many of the disable properties of human friendship networks such as trust between friends (directly linked peers) and short paths linking everyone via a chain of friends. In addition to new application possibilities, SLACER could supply ASN to P2P applications that currently depend on human social networks thus transforming them into fully autonomous, self-managing systems. Schloss Dagstuhl – Leibniz-Zentrum für Informatik David Hales and Stefano Arteconi 2006 Is Part Of Dagstuhl Seminar Proceedings, Volume 5361, Algorithmic Aspects of Large and Complex Networks (2006) InProceedings Text doc-type:ResearchArticle publishedVersion application/pdf doi:10.4230/DagSemProc.05361.8 urn:nbn:de:0030-drops-5659 https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.05361.8 eng https://creativecommons.org/licenses/by/4.0/legalcode