Patent ID: 8843391

Claim:
A computer-implemented method, comprising: receiving, in a computing apparatus, first user data to track first online activities of users, the first user data identifying first user identifiers, times of the first online activities of the first identifiers, and Internet Protocol (IP) addresses of the first online activities of the first identifiers; receiving, in the computing apparatus, second user data to track second online activities, the second user data identifying first account identifiers configured to identify payment accounts in which payment transactions are processed via a transaction handler of a payment processing network, times of the second online activities of the first account identifiers, and Internet Protocol (IP) addresses of the second online activities of the first account identifiers; and matching, by the computing apparatus, the times of the first online activities and the Internet Protocol (IP) addresses of the first online activities identified in the first user data with the times of the second online activities and the Internet Protocol (IP) addresses of the second online activities identified in the second user data to identify mapping between the first user identifiers and the first account identifiers.