1. National Institute of Informatics (NII), Tokyo, Japan
2. Dept. Computer Science, Worcester Polytechnic Institute, Worcester, MA, USA
3. Inst. Software & Systems Engineering, University of Augsburg, Augsburg, Germany
4. Cyber Physical Security Research Center, Tokyo, Japan
5. Graduate School of Informatics, Kyoto University, Kyoto, Japan
6. Mazda Motor Corporation, Fuchu, Japan