此属性用于指定 SOAP 接收方所支持的验证机制。验证机制提供了用户验证、数据完整性和加密。默认情况下，所有可用的验证机制都处于选定状态。如果 Web 服务使用方 (WSC) 使用未选定的验证机制发送请求，则系统将拒绝该请求。以下是支持的验证机制的列表：
urn:liberty:security:2003-08:null:null
urn:liberty:security:2003-08:null:X509
urn:liberty:security:2003-08:null:SAML
urn:liberty:security:2004-04:null:Bearer
urn:liberty:security:2003-08:TLS:null
urn:liberty:security:2003-08:TLS:X509
urn:liberty:security:2003-08:TLS:SAML
urn:liberty:security:2004-04:TLS:Bearer
urn:liberty:security:2003-08:ClientTLS:null
urn:liberty:security:2003-08:ClientTLS:X509
urn:liberty:security:2003-08:ClientTLS:SAML
urn:liberty:security:2004-04:ClientTLS:Bearer