Patent ID: 8595058

Claim:
A computer-implemented method, comprising: receiving, in a computing apparatus, first user data associated with first user identifiers used by a first user tracker to track first online activities of users, wherein the first user identifiers are browser cookie based identifiers, and the first user data includes at least first data fields for timestamp, and Internet Protocol (IP) address; receiving, in the computing apparatus, second user data associated by a second user tracker with second online activities of respective first account identifiers that uniquely identify accounts in a transaction handler, wherein the first account identifiers are account numbers of financial transaction cards, the first user tracker and the second user tracker are operated by different web servers, and the second user data includes at least second data fields for timestamp, and Internet Protocol (IP) address; and matching, by the computing apparatus, at least the first data fields for timestamp and Internet Protocol (IP) address in the first user data with at least the second data fields for timestamp and Internet Protocol (IP) address in the second user data to identify mapping between the first user identifiers and the first account identifiers.