Abstract: A general provider of a core registration service provides registration services to a special service provider. In one implementation, a first party presents a user registration form to a second party on behalf of a third party The first party receives registration provisioning data from the third party, which is used by the first party to generate a custom registration form. Responsive to receiving a request from a second party to register for a specialized service provided by a third party, the first party communicates the custom registration form to second party.

Abstract: Secure site-to-site transactional communication between at least two network servers coupled to a data communication network, including secure registration by an authentication server associated with a multi-site user authentication system. A network server receives a request via a browser f of a client computer. In response, the network server initiates a transaction with the authentication server and defines a data structure, such as a query string, associated with the transaction. The network server also generates a digital signature of the data structure and then adds it to the data structure before directing the client computer from the network server to the authentication server with the data structure and the added digital signature. The network server also adds an index to the data structure. The index is associated with the transaction and unique, per transaction, to the network server initiating the transaction.

Abstract: Methods and system of sharing information among network servers coupled to a data communication network for providing services to a user via a client on the network and data structure for use therewith. Related services provided by the network servers are grouped into service groups. A database stores user-specific information, including operational information to be shared within the service groups. A central server coupled to the network receives a request from the user for a selected service and determines whether the selected service belongs to one of the service groups. In response to the request, the central server retrieves user-specific information identifying the user with respect to the selected service. The retrieved information includes operational information to be shared within each of the service groups to which the selected service belongs.

Abstract: A general provider of a core registration service provides registration services to a special service provider. In one implementation, a first party presents a user registration form to a second party on behalf of a third party The first party receives registration provisioning data from the third party, which is used by the first party to generate a custom registration form. Responsive to receiving a request from a second party to register for a specialized service provided by a third party, the first party communicates the custom registration form to second party.