Proceedings of the 2nd International Workshop on Information Management for Mobile Applications Message from the Workshop Chairs Mobile devices pose tremendous challenges to the design and implementation of information sys- tems suited for mobile environments. While users expect similar functionality on their smart-phone as provided on their laptop or desktop computer, the hardware and communication platforms are still limited. Especially, data-intensive mobile applications require new ways of data management, processing, and analysis. Crucial issues include energy-efficiency, limited CPU power and storage, real-time processing, small displays, and communication costs. The International Workshop on Information Management for Mobile Applications (IMMoA’12) targets to provide a forum for researchers and practitioners to present, share, and discuss insights, advancements, and challenges in technologies and mechanisms which support the management of mobile, complex, integrated, distributed, and heterogeneous data-focused applications. The workshop aims in particular at the challenges of managing complex data and data models in a mobile context. Mobile data management has become an important research area in the field of data management. Therefore, the 38th International Conference on Very Large Databases provides an interesting forum to discuss recent advancements in mobile data management research. The limitations but also new opportunities of mobile devices initiated new research topics which are addressed in this workshop. We received more than ten high quality submissions of which we could accept five as full papers and and one as short paper. The papers have been peer-reviewed by three to four reviewers each. The accepted papers discuss data management techniques for distributed mobile applications and peer-to-peer systems, integration of distributed mobile data sources, mechanisms for privacy preservation, and context-based systems. The workshop program is completed by an invited talk entitled “Dynamic Context Management for Mobile Applications” given by Prof. Dr. Daniela Nick- las from Oldenburg University. We hope that the workshop initiates inspiring and fruitful discussions and that the second edition will be as successful as the first workshop held in 2011. We would like to thank the DFG Research Cluster Ultra High-Speed Mobile Information and Communication (UMIC, http://www.umic. rwth-aachen.de) at RWTH Aachen University, Germany, for their support in organizing this event. Furthermore, we would like to thank the reviewers for their good work. Thierry Delot University of Valenciennes & Inria Lille Sandra Geisler RWTH Aachen University Christoph Quix RWTH Aachen University Bo Xu University of Illinois at Chicago 1 Workshop Chairs and Program Committee Workshop Chairs • Thierry Delot, Dept. of Computer Science, University of Valenciennes & Inria Lille, France • Sandra Geisler, Information Systems, RWTH Aachen University, Germany • Christoph Quix, Information Systems, RWTH Aachen University, Germany • Bo Xu, Department of Computer Science, University of Illinois at Chicago Program Committee Yuan An, Drexel University, USA Jochen Meyer, OFFIS, Germany Ying Cai, Iowa State University, USA Nathalie Mitton, INRIA Lille, France Xinzheng Niu, University of Electronic Science Xin Chen, NavTeq, USA and Technology of China, China Aris Ouksel, University of Illinois at Chicago, Hyung-Ju Cho, Ajou University, Korea USA Christine Collet, Grenoble INP, France Claudia Plant, Florida State University, USA Bruno Defude, Télécom & Management Sud- Florence Sèdes, University Paul Sabatier Paris, France Toulouse, France Marwan Hassani, RWTH Aachen University, David Taniar, Monash University, Australia Germany Hideki Hayashi, Hitachi Central Research Lab- Masaaki Tanizaki, Hitachi Central Research oratory, Japan Laboratory, Japan Sergio Ilarri, University of Zaragoza, Spain Goce Trajcevski, Northwestern University, USA David Kensche, Thinking Networks AG, Ger- Upkar Varshney, Georgia State University, USA many Xiangyang Li, Illinois Institute of Technology, Jari Veijalainen, University of Jyväskylä, Fin- USA land Andreas Lorenz, Deutsche Telekom AG, Ger- Ouri Wolfson, University of Illinois at Chicago, many USA Doug Lundquist, University of Illinois at José-Luis Zechinelli-Martini, Universidad de Las Chicago, USA Americas Puebla, Mexico Sanjay Madria, Missouri University of Science Xianggang Zhang, University of Electronic Sci- and Technology, USA ence and Technology of China, China 2 Table of Contents Keynote: Dynamic Context Management for Mobile Applications 4 Daniela Nicklas (Carl von Ossietzky Universität Oldenburg, Germany) A Hierarchical Approach to Resource Awareness in DHTs for Mobile Data 5 Management Liz Ribe-Baumann (Ilmenau University of Technology, Germany) Kai-Uwe Sattler (Ilmenau University of Technology, Germany) Towards an ambient data mediation system 13 Kim Tâm Huynh (PRiSM Laboratory, University of Versailles, France), Béatrice Finance (PRiSM Laboratory, University of Versailles, France), Mokrane Bouzeghoub (PRiSM Laboratory, University of Versailles, France) Context-Aware Routing Method for P2P File Sharing Systems over MANET 21 Taoufik Yeferny (Dept. of Computer Science, Faculty of Sciences of Tunis, Tunisia), Khedija Arour (Dept. of Computer Science, National Institute of Applied Sciences and Technology of Tunis, Tunisia), Amel Bouzeghoub (Dept. of Computer Science, Télécom SudParis, France) Considering the High Level Critical Situations in Context-Aware Recom- 26 mender Systems Djallel Bouneffouf (Dept. of Computer Science, Télécom SudParis, France), Amel Bouzeghoub (Dept. of Computer Science, Télécom SudParis, France), Alda Lopes Gançarski (Dept. of Computer Science, Télécom SudParis, France) Privacy Preservation for Location-Based Services Based on Attribute Visi- 33 bility Masanori Mano (Graduate School of Information Science, Nagoya University, Japan), Xi Guo (Graduate School of Information Science, Nagoya University, Japan), Tingting Dong (Graduate School of Information Science, Nagoya University, Japan), Yoshiharu Ishikawa (Information Technology Center/Graduate School of Information Science, Nagoya University, Japan) Applying Pervasive and Flexible Access Control to Distributed Multimedia 41 Retrieval Dana Al Kukhun (Université de Toulouse - IRIT - UMR 5505, France), Dana Codreanu (Université de Toulouse - IRIT - UMR 5505, France), Ana-Maria Manzat (Université de Toulouse - IRIT - UMR 5505, France), Florence Sedes (Université de Toulouse - IRIT - UMR 5505, France) 3