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.
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)。
3
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).