Colleages of Computer Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 211100 China;
Colleages of Computer Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 211100 China;
Colleages of Computer Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 211100 China;
Colleages of Computer Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 211100 China;
Colleages of Computer Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 211100 China;
TMWSNs; Secure KNN queries; MR-Tree; Privacy; Integrity Communication overhead;