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.

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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.”

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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.

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