1. Department of Computer and Network Engineering, The University of Electro-Communications, Tokyo, Japan
2. Institute of Scientific and Technological Research and Application, Academy of Cryptography Techniques, Hanoi, Vietnam
3. Faculty of Electronics and Telecommunications, The University of Science, Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
4. Institute of System Integration, Le Quy Don Technical University, Hanoi, Vietnam