A system for iteratively matching a plurality of spatiotemporal trajectories of a plurality of users is provided. The system comprises at least one processor, being configured for: receiving a plurality of first spatiotemporal trajectories and a plurality of second spatiotemporal trajectories each generated based on location data. Using a quality classifier for classifying the plurality of first spatiotemporal trajectories into first low quality trajectories and first high quality trajectories and the plurality of second spatiotemporal trajectories into second low quality trajectories and second high quality trajectories the processor identifies a plurality of high quality trajectories pairs and a plurality of low quality pairs; associating to each pairs with a confidence value indicative of a disparity; adjusting the confidence values and re-inputting into the quality classifier all spatiotemporal trajectories which are part of a low quality pair or a high quality trajectories pair whose adjusted confidence value is below the threshold.