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广义签密具有签密、签名和加密多功能的优势,适用于设计安全的电子邮件协议.为解决电子邮件协议中的安全问题,提出了一个新的无需可信任PKG的广义签密方案,并在此基础上设计一种能够发送私人邮件、公告邮件的多功能电子邮件协议.该协议利用密钥追溯技术解决私钥托管问题,利用身份认证技术有效地阻止垃圾邮件的接收,通过随机预言模型证明方案的安全性.分析表明,提出的协议有效地增强了邮件传输过程中信息的安全性,多功能特性提高了传统电子邮件协议的信息处理能力,方案的效率也有所提高.
Generalized Signcryption has the advantages of multi-signcryption, signature and encryption and is suitable for the design of secure e-mail protocols. To solve the security problem in e-mail protocols, a new generalized signcryption scheme without trust PKG On this basis, we design a multi-functional e-mail protocol that can send private e-mail and bulletin e-mail.This protocol uses the key backtracking technology to solve the problem of private key escrow, and uses the authentication technology to effectively prevent the spam from being received. And proves the security of the scheme.The analysis shows that the proposed protocol effectively enhances the security of information in the mail transmission process, and the multi-functional features improve the information processing capabilities of the traditional e-mail protocol, and the efficiency of the scheme is also improved.