A system and method provides security features for inter-computer communications. After a user has proved an association with one of several firms, a user identifier of the user that cannot be used to log the user in to a data consolidating system is received by a matching system from the data consolidating system. The validity of the user and the firm is checked at the matching system and, in response to the checking, the user identifier is converted to a different user identifier and the different user identifier is provided to a data providing system by the matching system. The data providing system provides the data of the user in response, and the matching system forwards the data to the data consolidating system.