istent Identifiers to Improve Inter-Domain Mobility and Security Henry Jerez, Joud Khoury, and Chaouki Abdallah 11 SIP and Vertical Handoffs in Heterogeneous Wireless Networks Jie Zhang, F. Richard Yu, Xiaolei Wang, Henry C. B. Chan, and Victor C. M. Leung 12 NAT Traversal Mario Baldi, Fulvio Risso, and Livio Torrero 13 Multipoint Extensions for SIP Sureswaran Ramadass and Omar Abouabdalla 14 Narrowcasting in SIP: Articulated Privacy Control Sabbir Alam, Michael Cohen, Julián Villegas, and Ashir Ahmed 15 Q-SIP/SDP for QoS-Guaranteed End-to-End Real-Time Multimedia Service Provisioning on Converged Heterogeneous Wired and Wireless Networks Young-Tak Kim and Young-Chul Jung 16 SIP Modeling and Simulation Yanlan Ding, GuiPing Su, and Huaxu Wan 17 SIP-Based Mobility Management and Its Performance Evaluation Nilanjan Banerjee and Kalyan Basu III SECURITY 18 SIP Security: Threats, Vulnerabilities and Countermeasures Dimitris Geneiatakis, Georgios Kambourakis and Costas Lambrinoudakis C 2009 by Taylor & Francis Group, LLC Contents 19 SIP Vulnerabilities for SPIT, SPIT Identification Criteria, Anti-SPIT Mechanisms Evaluation Framework and Legal Issues G. F. Marias, L. Mitrou, M. Theoharidou, J. Soupionis, S. Ehlert, and D. Gritzalis 20 Anonymity in SIP L. Kazatzopoulos, K. Delakourides, and G. F. Marias 21 Secure Intelligent SIP Services Handoura Abdallah 22 SIP Security and Quality of Service Performance Johnson Ihyeh Agbinya 23 A Conceptual Architecture for SPIT Mitigation Yacine Rebahi, Stelios Dritsas, Tudor Golubenco, Benjamin Pannier, and Johan Fredrik Juell 24 Towards a Fraud Detection Framework in VoIP Networks Yacine Rebahi, Thomas Magedanz, and Dorgham Sisalem © 2009 by Taylor & Francis Group, LLC Preface Session Initiation Protocol (SIP) is among the most widely adopted protocols for IP telephony. SIP, as presented by the IETF, forms a flexible, comprehen- sive signaling solution and allows for a lightweight deployment of many, but not all, of the well-known service features. The simpler implementation and ope