A method includes, in a server residing in a network of interconnected computers, receiving user data, dissecting the received user data into a plurality of key/value pairs, iterating through the plurality of key/value pairs, generating a new data structure in the memory of the server for each key/value pair that do not exist, inserting a UserID into a set associated for a specific key/value pair, storing the key/value sets, and destroying the received user data.