认证断言要求用户证实自己的身份。
Authentication assertions require that the user prove his identity.
然后，发行认证机构可以根据移动设备客户机提供的凭证发送肯定或否定认证断言。
The issuing authority can then send a positive or negative authentication assertion depending upon the credentials presented by the mobile device client.
对上述请求的响应（如下所示）包含带有指定认证有效的时间段的属性／条件的认证断言。
The response to the above request (shown below) contains the authentication assertion with an attribute/condition that specifies the time period when the authentication is valid.
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