A method of determining a connection between a source party and a target party includes constructing a host database, the host database including a plurality of records, each record including a number of data fields, each of the data fields including identification information of a party, the identification information being extracted from non-restricted sources; constructing a client database, the client database including a plurality of records, each record including a number of data fields, each of the data fields including identification information of a party, the identification information being extracted from a client's private sources; receiving identification information of a source party and a target party; identifying a record in the client database including identification information of the source party; identifying a record in the host database including identification information of the target party; searching the data fields in the records of at least one of the client database and the host database to locate identification information commonalities between the source party record and at least one intermediate party record; searching the data fields in the records of at least one of the client database and the host database to locate identification information commonalities between the at least one intermediate party record and the target party record; and upon locating at least one identification information commonality between the at least one intermediate party record and the target party record, generating a list including the at least one intermediate party record.