基于RSA的多重签密方案

指出原有多重签密方案存在的缺陷,并提出一种新的基于RSA的多重签密方案。本方案以RSA密码体制为基础,借鉴了原有多重签密方案的结构特点。改善了原有多重签密方案的缺陷,在安全性上实现了消息保密性、不可伪造性、不可否认等特性,同时考虑了原始消息的安全发送问题。在同等安全下,本方案比传统的先签名再加密方式,在执行效率和执行灵活性方面具有更多优势。基于RSA密码体制的广泛应用,方案简洁且易于建立,适合在电子政务和电子商务环境下为消息的安全传递提供认证加密保护。

Multi-signcryption scheme based on RSA

This paper pointed out the weaknesses of the previous multi-signcryption schemes.And then presented a new multi-signcryption scheme.The new scheme was based on the RSA and used the previous schemes' structural feature for reference.The model considered the security of original message transmitting and improved the weaknesses of previous schemes.The new scheme provided message confidentiality,unforgeability,non-repudiation services.At the same security level the new scheme was more efficient and flexible than traditional "signature then encryption" approach.Due to the widely use of RSA,the new scheme was simple and could be set up easily.It's fit to provide useful cryptographic protection for message circulation in E-commerce and E-government environment.