@ARTICLE{6637046, author={Xiao, Liang and Yan, Qiben and Lou, Wenjing and Chen, Guiquan and Hou, Y. Thomas}, journal={IEEE Transactions on Information Forensics and Security}, title={Proximity-Based Security Techniques for Mobile Users in Wireless Networks}, year={2013}, volume={8}, number={12}, pages={2089-2100}, doi={10.1109/TIFS.2013.2286269}}