Abstract: An identity based service system is provided, in which an identity is created and managed for a user or principal, such that at least a portion of the identity is available to use between one or more system entities. A discovery service enables a system entity to discover a service descriptor, given a service name and a name identifier of the user, whereby system entities can find and invoke the user's other personal web services. The discovery service preferably provides a translation between a plurality of namespaces, to prevent linkable identity information over time between system entities.

Abstract: It is useful to provide a mechanism to allow, at least temporarily, communications to occur without blocking between a first entity and a second entity with whom communications with the first entity are likely/anticipated and desirable, generally through use of a white-list having transactional entries. For example, to allow communications between a communications user and an intended recipient, the user may be added to global and/or personal white-lists for or until a specified transaction or duration. Thereafter, the user may be removed from the white-lists upon occurrence of an end trigger, which may include an event or expiration of a specified time. The disclosed systems and methods thus permit the transactional white-listing of users for a limited time necessary to ensure the intended recipient receives the anticipated communications. Thereby, the systems and methods guard against the anticipated communications being accidentally blocked as spam by other communications filters.