The concept of identity infrastructure asaservice fol-lows two major trends: the evolution of it from capital infrastructure to a service, and the consumerization of it.
Provider services still regard the ESB asa trusted user and all requests are made under the identity of the ESB or of a known trusted service on the ESB.
For example, is there a need to propagate client identity through intermediate systems such as brokers to the end-providers of service implementations?