nonrepudiation

This model mainly solve Authentication , Nonrepudiation, Privacy and Integrity existed in the current mail system.

该模型主要解决了邮件系统中存在的身份鉴别、止抵赖 、 密性、整性等安全问题.

It provides not only confidentiality but also the data authentication, integrity and nonrepudiation.

它不仅具有传统的信息加密能力,并且能够保证信息的真实性, 完整性和有效性.

because nonrepudiation is a direct result of authentication, message encryption also does not provide nonrepudiation.

由于认可是身份验证的直接结果，因此邮件加密也不提供认可。

As Levy observes, This nonrepudiation feature is the electronic equivalent of a notary public seal.

正如列维认为:“这种不可否认性特征是公证人印章的电子等价物.”

signature is proof of origin (nonrepudiation)

签字为原件的证明（非拒绝）

thus, the authentication that a signature provides gives the means to enforce nonrepudiation.

因此，签名所提供的身份验证提供了一种强制认可的手段。

The CA mechanism is executed by using the no-inverse digital signature scheme, and the complexity of computing is reduced. The mutual signatures of communication realize the nonrepudiation. The security analysis of the protocol is given.

应用无求逆数字签名方案实现CA认证，简化了计算复杂度，并通过通讯双方数字签名实现不可抵赖性，最后给出了协议安全分析。

digital signatures also play a role in nonrepudiation.

数字签名也可用于认可。

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）。