Patent Document ID: 9870486
Application ID: 14864300
Patent Flag: 1

Claim One:
1. A method comprising: generating decoy database proprietor identifiers based on probability density functions; querying a database proprietor using panelist database proprietor identifiers and the decoy database proprietor identifiers to obtain demographic information associated with the panelist database proprietor identifiers; in response to querying the database proprietor using the panelist database proprietor identifiers and the decoy database proprietor identifiers: receiving (a) demographic information corresponding to the panelist database proprietor identifiers and the decoy database proprietor identifiers that are associated with subscribers to the database proprietor, and (b) errors indicating that particular ones of the decoy database proprietor identifiers are not associated with the subscribers to the database proprietor; and regenerating the probability density functions based on the panelist database proprietor identifiers and the decoy database proprietor identifiers that are associated with the subscribers to the database proprietor; and assigning the panelist database proprietor identifiers to panelists based on the demographic information obtained from the database proprietor.