Peer-to-Peer (P2P) systems are decentralized, self-organizing distributed systems that cooperate to exchange data. These systems have emerged as the dominant consumer of residential Internet subscribers' bandwidth, and are being increasingly used in many different application domains. In the last few years, research on P2P systems has been quite intensive, and has produced remarkable results in scalability, robustness, location, distributed storage, and system measurements. Consequently, P2P systems continue to evolve, differentiating today's state-of-the-art from earlier instantiations such as Napster, KaZaA, Gnutella, and Morpheus.

The International Workshop on Hot Topics in Peer-to-Peer Systems (Hot-P2P), aims to bring together researchers and practitioners, from both industry and academia, in the fields of systems, networking, and theory, and to represent an occasion to share latest research results and ideas on P2P systems, thereby promoting research activities in this area. Topics of interest include, but are not limited to:

• P2P applications and infrastructures
• Performance evaluation and workload characterization
• Trust and reputation in P2P systems
• Security and privacy in P2P systems
• Routing and fault-tolerance in P2P systems
• Resource discovery/management in P2P systems
• Network support for P2P systems
• Self-organization and self-management of P2P environments