摘要
签密能够在一个合理的逻辑步骤内同时完成数字签名和公钥加密两项功能,而其计算量和通信成本都要低于传统的"先签名后加密"。文章总结和分析了签密体制的研究进展,根据公钥认证方法将其归类为基于PKI的签密体制、基于身份的签密体制和无证书签密体制。每一类签密体制又进一步分为基本签密体制、具有特殊性质的签密体制和混合签密体制。文章给出了基于PKI的签密体制和基于身份的签密体制的形式化模型。指出了需要进一步研究的问题。该文有助于理解1997年至2011年之间签密体制的研究情况。
Signcryption is a cryptographic primitive that fulfills both the functions of digital signature and public key encryption simultaneously, at a cost significantly lower than that required by the traditional signature-then-encryption approach. In this article, the state-of-the-art of signcryption is surveyed. This paper classifies signcryption as PKI-based signcryption, identity-based signcryption and certificateless signcryption according to the authentication method of public keys. Each classification is classified further as basic signcryption, signcryption with special properties and hybrid signcryption. The formal models of PKI-based signcryption and identity-based signcryption are also given. Some possible future work is pointed out. The survey helps in understanding the research work that has been carried out in the area of signcryption from the year 1997 to 2011.
出处
《信息网络安全》
2011年第12期1-8,共8页
Netinfo Security
基金
国家自然科学基金[60803133
61073176]
中央高校基本科研业务费专项资金
关键词
密码学
签密
PKI
基于身份
无证书
cryptography
signcryption
PKI
identity-based
certificateless
