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本文提出了一个具有完善保密性的可证实电子邮件协议PCCMP,它不仅具有文[1] 中协议的安全性,而且为电子邮件提供了完善的机密性,使包括邮局在内的任何第三方都不能了解电子邮件的内容
In this paper, a confidentiality-proof authentic e-mail protocol PCCMP is proposed, which not only has the protocol security in [1], but also provides perfect confidentiality for e-mail, so that any third party including the post office Can not understand the contents of the email