## The tracker can do better by

- increasing the number of points combined in a single query
- i.e. there exist attacks for which

## n → n → 0

## n → 0 n/k →

## There is a tight lower bound on the limit of n/k such that

## n → n → 0

## i.e, (n → n → 0) lim n/k > 1/C Privacy measure

## Recall: C is max. value of change in entropy