Research Article

LPPS: A Distributed Cache Pushing Based K-Anonymity Location Privacy Preserving Scheme

Table 1

Statistics of trace datasets.

Traces GeolifeCabspotting

Number of users 178536
Region BeijingSan Francisco
Duration 4 years30 days
Number of stay points 13,6661,894,208
Number of queries generated 7,6939,266,161
Number of grids