Secure data monitoring utilizing secure private set intersection

Methods for secure data monitoring utilizing secure private set intersections are disclosed. In embodiments, a computer-implemented method includes: generating a garbled circuit program compiled into a first and second half; sending the second half of the garbled circuit program to a client server of a client; receiving social network data from a social network provider; and generating search results, utilizing the first half of the garbled circuit program in cooperation with the second half of the garbled circuit program, based on client data input at the second half of the garbled circuit program. The client data is private with respect to the social network provider and the social network data is private with respect to the client.