This project intends to solve the case when two people share common interests, such as fruits they like, but are unwilling to reveal any of them unless it matches the other person's interests. This is a common problem known as Private Set Intersections or PSI. The idea is to let people know whether they share something in common with someone else while keeping their preferences private. There are multiple approaches to the problem, and we focused primarily on checking if the size of the intersection (i.e. cardinality) is greater than 0.