The system user perspective is very similar to that of the customer representative, in that users will get to see periodic evidence of progress to ensure that the solution will meet their real needs.

系统用户视角与客户视角非常相象，用户可以看到关于进展的周期性迹象以确保解决方案能够适应他们的实际需要。

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Nonrepudiation provides evidence that a particular action occurred and can be traced to a specific entity (user or business).

抗抵赖性提供了发生过某个动作的证据，并且可以跟踪到特定的实体(用户或者公司)。

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To achieve this, you publish policies asserting that the client runtime must ensure message confidentiality and must provide evidence of the user's identity (user ID/password or a certificate).

要支持各种客户机运行时，请发布断言客户机运行时必须确保消息机密性，并必须提供用户身份的证据（用户 ID/密码或证书）的策略。

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Facebook has revealed it was the target of a "sophisticated attack" by hackers last month, but found no evidence any user data had been compromised.

BBC: Facebook was targeted by 'sophisticated' hackers

Unlike Twitter, Facebook said it has found no evidence that any user information was compromised.

CNN: Facebook hacked, says no user data compromised

"We have no evidence that Facebook user data was compromised in this attack, " Facebook said in its blog post.

BBC: Facebook was targeted by 'sophisticated' hackers