TY - Front. Comput. Sci. A1 - Jiaxun HUA, Yu LIU, Yibin SHEN, Xiuxia TIAN, Yifeng LUO, Cheqing JIN T1 - A privacy-enhancing scheme against contextual knowledge-based attacks in location-based services Y1 - JF - Frontiers of Computer Science JO - Front. Comput. Sci. SP - 143605 EP - VL - 14 IS - 3 UR - https://journal.hep.com.cn/fcs N1 - 10.1007/s11704-019-8300-4 ER -