Frequency-based Randomization for Guaranteeing Differential Privacy in Spatial Trajectories. (arXiv:2207.03722v1 [cs.DB])

With the popularity of GPS-enabled devices, a huge amount of trajectory data
has been continuously collected and a variety of location-based services have
been developed that greatly benefit our daily life. However, the released
trajectories also bring severe concern about personal privacy, and several
recent studies have demonstrated the existence of personally-identifying
information in spatial trajectories. Trajectory anonymization is nontrivial due
to the trade-off between privacy protection and utility preservation.
Furthermore, recovery attack has not been well studied in the …

differential privacy privacy