Location privacy protection method in large-scale indoor location-based service scene

• Main Authors: LI SHIYIN, MIN MINGHUI, XU JUNHUAI, LI-SUN XIAOHE, CUI BOYAN
• Format: Patent
• Language: Chinese; English
• Published: 29.10.2021
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; WIRELESS COMMUNICATIONS NETWORKS

The invention discloses a location privacy protection method in a large indoor location service scene, and belongs to the field of location service and information security. The protection method comprises the following steps: aiming at location privacy leakage caused by an untrusted server or an eavesdropping attacker in a three-dimensional space location service process, simultaneously disturbing X, Y and Z coordinates of a location based on a three-dimensional Laplacian noise adding mechanism by adopting geographical location undistinguishability, and determining a disturbed location by utilizing a discretization and truncation method; then analyzing a mathematical quantization relation of the privacy budget before and after discretization and truncation, and compensating privacy budget degradation caused by discretization by adding extra noise. Herein, the location privacy leakage of a three-dimensional space location service environment is dealt with, and the location data privacy security performance of