WS-Trust is a WS-* specification and OASIS standard that provides extensions to WS-Security
WS-Trust is a WS-* specification and OASIS standard that provides extensions to WS-Security, specifically dealing with the issuing, renewing, and validating of security tokens, as well as with ways to establish, assess the presence of, and broker trust relationships between participants in a secure message exchange.
WS-Trust defines a number of new elements, concepts and artifacts in support of that goal, including:
- the concept of a Security Token Service (STS) - a web service that issues security tokens as defined in the WS-Security specification.
- the formats of the messages used to request security tokens and the
responses to those messages. - mechanisms for key exchange
