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

Table 2

Performance comparison.

Comparison	LPPS	The classical -anonymity strategy
Basic idea	Push-based strategy	Pull-based strategy
Privacy preservation	Guarantee -anonymity	Guarantee -anonymity
Service coverage ratio	when	No proxy, just query data directly
Cache hit ratio	to when and	No cache, just query data directly
Communication overhead	of the classical -anonymity strategy in the best case	Much higher than LPPS