1. A computer program product, comprising a non-transitory computer usable medium having a computer readable program code embodied therein, the computer readable program code adapted to be executed to implement a method, the method comprising: storing for each of a plurality of entities policy data corresponding thereto for governing interaction with at least one of the entities utilizing an interoperability network, including: storing first policy data of a first one of the entities, the first one of the entities including a user and the first policy data particular to the user and used for authorization of the user by requiring from the user submission of a valid password credential, and storing second policy data of a second one of the entities, the second one of the entities including one of an application and a service and the second policy data particular to the one of the application and the service and used for control of access to information of the one of the application and the service; receiving a message from the user for being transmitted in the interoperability network to the one of the application and the service, the message for accessing by the user the information of the one of the application and the service; in response to the receipt of the message, identifying the first policy data of the user and the second policy data of the one of the application and the service; merging the identified first policy data of the user and the identified second policy data of the one of the application and the service to produce a combined policy that is honored by both of the user and the one of the application and the service with respect to the transmission of the message from the user in the interoperability network to the one of the application and the service; evaluating the combined policy at run-time with respect to the received message; determining whether the message is associated with a policy violation, based on the evaluation of the combined policy; rejecting the message when the determination is that the message is associated with the policy violation; and transmitting the message when the determination is that the message is not associated with the policy violation.