WS-Trust comprises a protocol that systems and applications use when requesting a service to issue, validate, and exchange security tokens.
Organizations can leverage WS-Trust to centralize their security-token processing. The WS-Trust specification defines the role of a Security Token Service (STS) as the entity responsible for responding to requests using the protocol. In this role, the STS creates new security tokens, validates existing security tokens, exchanges security tokens of one type for those of another, or any combination of these.
The WS-SX (Secure Exchange) technical committee manages the WS-Trust specification through its contribution to the OASIS standards organization. For more information, see www.oasis-open.org/committees/tc_home.php?wg_abbrev=ws-sx.