摘要： 针对后量子时代的网络通信安全问题，对编码密码中的Niederreiter密码体制进行研究，将基于改进Niederreiter密码的双公钥加密方案与Xinmei签名方案相结合，构造一种抗量子签密方案。安全性分析结果表明，该方案能够满足IND-CPA与EUF-CMA安全，并可实现对直接译码攻击以及ISD攻击的良好防御，相比先签名后加密的签密方法，其密文量下降50%，能够为后量子时代用户的网络通信提供机密性与不可伪造性的安全防护。

关键词: 编码密码, 双公钥加密, Niederreiter密码体制, 签密, 安全性分析

Abstract: To address security issues of network communication in the post-quantum era,this paper studies the Niederreiter cryptosystem in code-based cryptography,and combines the double public key cryptographic scheme based on the improved Niederreiter scheme with the Xinmei signature scheme to construct an anti-quantum signcryption scheme.Security analysis results show that the proposed signcryption scheme can meet the security requirements of IND-CPA and EUF-CMA,and can achieve excellent defense against direct decoding attacks and ISD attacks.Compared with signcryption schemes that implement encryption after signing,the proposed scheme can reduce the amount of ciphertext by 50%,providing confidentiality and unforgeable security for network communication in the post-quantum era.

Key words: code-based cryptography, double public key cryptography, Niederreiter cryptosystem, signcryption, security analysis

中图分类号: 

• TP309.7