标准模型下高效安全的基于证书密钥封装机制

发布时间：2018-01-10 18:29

本文关键词：标准模型下高效安全的基于证书密钥封装机制　出处：《计算机研究与发展》2014年07期 　论文类型：期刊论文

【摘要】：基于证书密码体制有机结合了传统公钥密码体制和基于身份密码体制,不仅克服了基于身份密码体制固有的密钥托管和密钥分发问题,而且简化了传统公钥基础设施中复杂的公钥证书管理,是一种颇受关注的新型公钥密码体制.基于证书密钥封装机制,将密钥封装机制与基于证书密码体制相结合,具备基于证书密码体制的优良特性.基于双线性对,提出了一个高效的并且可证明安全的基于证书密钥封装机制方案.在标准模型下基于判定性截断q-ABDHE问题和判定性1-BDHI问题的困难性,该方案被证明满足适应性选择密文攻击下的不可区分安全性,即满足选择密文安全性.与已有的标准模型下安全的基于证书密钥封装机制方案相比,该方案具有更高的计算效率和更低的通信带宽要求.
[Abstract]:Certificate based cryptosystem combines the traditional public key cryptosystem with the identity-based cryptosystem. It not only overcomes the problems of key escrow and key distribution inherent in the identity-based cryptosystem. Moreover, it simplifies the complex public key certificate management in the traditional public key infrastructure, and is a new public key cryptosystem, which is based on the certificate key encapsulation mechanism. Combining the key encapsulation mechanism with the certificate based cryptosystem, it has the excellent characteristics of the certificate based cryptosystem and the bilinear pair. In this paper, an efficient and verifiable certificate based key encapsulation scheme is proposed. It is difficult to truncate q-ABDHE problem based on decision and 1-BDHI problem in standard model. This scheme has been proved to satisfy the indistinguishable security under adaptive selection ciphertext attack, that is, to satisfy the security of selected ciphertext. Compared with the existing standard model security scheme based on certificate key encapsulation mechanism. This scheme has higher computing efficiency and lower communication bandwidth.
【作者单位】：河海大学计算机与信息学院;
【基金】：国家自然科学基金项目(61272542)
【分类号】：TN918.4
【正文快照】： 基于证书密码体制(certificate-based cryptography,CBC)是Gentry[1]在2003年的欧洲密码会议上提出的一种新型公钥密码体制.该体制有机结合了传统公钥密码体制和基于身份密码体制,具有这2种密码体制的一些优点.在基于证书密码体制中,每个用户首先自行生成自己的公私钥对,然后

【参考文献】