Hierarchical Identifier: Application to User Privacy Eavesdropping on Mobile Payment App Wang, Yaru ; Zheng, Ning ; Xu, Ming ; Qiao, Tong ; Zhang, Qiang ; Yan, Feipeng ; Xu, Jian Abstract Publication: Sensors Pub Date: July 2019 DOI: 10.3390/s19143052 Bibcode: 2019Senso..19.3052W