Appendix A Additional Experiments

In this section, we present some additional experiments. Section A.1, we conduct experiments using different number of parties (as opposed to three parties Section A.3, we test our methods in VKMC with different number of centers; and finally in Section A.4, we conduct experiments on another dataset ( KC House Dataset [35]). In this section, we test our algorithms using different number of parties. Empirical setup Most of the experimental setups are the same as those in Section 6, except that now we use 5 parties instead of 3 parties. Empirical results Figure 4 and 5 summarize our results for VRLR and VKMC respectively.