1.Security token claims can be endorsed by an authority or left unendorsed.
安全令牌声明可由授权机构核准或不核准。
2.An unendorsed claim can thus be trusted if there is any established trust relationship between the sender and the receiver.
这样，如果发送方和接收方之间有已确立的信任关系，则可信任未经核准的声明。