In this recipe, we implemented an LPPM that uses PIR and a dummy query called MaPIR. It created a mapping function for points of interest that allowed us to query using different scales. It also included redundancy in the answer, providing privacy protection, as it did not reveal the actual location of the user.
The process required for calculating the mapping of a dataset should be stored in a table that will be used for a user’s queries. In the MaPIR paper, it was shown that despite the multiple results, the execution time of the MaPIR queries took less than half the time, compared to the geopraphical queries based on distance.
