[Term] WS-Federation passive requester profile [Definition] 
The WS-Federation Passive Requester Profile describes how the cross-trust realm identity, authentication, and authorization federation mechanisms that are defined in WS-Federation can be used by passive requesters, such as web browsers, to provide identity services. Passive requesters of this profile are limited to the HTTP protocol. For more information about the WS-Federation Passive Requester Profile, see WS-Federation: Passive Requestor Profile.