一种可证安全的PKI和IBC双向匿名异构签密方案的改进

曹素珍; 郎晓丽; 刘祥震; 张玉磊; 王彩芬

doi:10.11999/JEIT180982

一种可证安全的PKI和IBC双向匿名异构签密方案的改进

doi: 10.11999/JEIT180982

西北师范大学计算机科学与工程学院兰州 730070

基金项目: 国家自然科学基金(61163038, 61262056, 61262057)，甘肃省高等学校科研项目(2017A-003, 2018A-207)

详细信息

作者简介:
曹素珍：女，1976年生，副教授，研究方向为公钥密码学和软件安全

郎晓丽：女，1993年生，硕士生，研究方向为密码学与信息安全

刘祥震：男，1991年生，硕士生，研究方向为密码学与信息安全

张玉磊：男，1979年生，博士，副教授，研究方向为密码学和信息安全

王彩芬：女，1963年生，博士，教授，研究方向为密码学和信息安全

通讯作者:
张玉磊　zhangyl@nwnu.edu.cn

中图分类号: TP309
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- 文章访问数: 1950
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- 被引次数: 0
出版历程
- 收稿日期: 2018-10-19
- 修回日期: 2019-03-12
- 网络出版日期: 2019-04-13
- 刊出日期: 2019-08-01

Improvement of a Provably Secure Mutual and Anonymous Heterogeneous Signcryption Scheme Between PKI and IBC

College of Computer Science and Engineering, Northwest Normal University, Lanzhou 730070, China

Funds: The National Natural Science Foundation of China (61163038, 61262056, 61262057), The Higher Educational Scientific Research Foundation of Gansu Province (2017A-003, 2018A-207)

摘要

摘要: 异构签密可以保证异构密码系统之间数据的机密性和不可伪造性。该文分析了一个传统公钥密码(PKI)和身份密码(IBC)之间的PKI→IBC和IBC→PKI双向匿名异构签密方案的安全性，指出PKI→IBC方案和IBC→PKI方案均不能抵挡敌手攻击，敌手在获取密文前提下均可解密密文。为了增强安全性，该文提出一个改进的PKI→IBC和IBC→PKI方案，并在随机预言模型下基于计算性Diffie-Hellman困难问题和双线性Diffie-Hellman困难问题证明新方案满足机密性与不可伪造性。同时效率分析表明，所提方案具有更高的通信效率。
- 异构签密 /
- 选择密文攻击 /
- 机密性 /
- 不可伪造性
Abstract: Heterogeneous signcryption can ensure the confidentiality and unforgeability of information data between different cryptosystems systems. Security for the traditional Public Key Infrastructure (PKI) and Identity-Based Cryptosystem (IBC) two-way and anonymous heterogeneous signcryption scheme between PKI→IBC and IBC→PKI is analyzed. It is pointed out that PKI→IBC scheme and IBC→PKI scheme can not resist adversary attacks. The ciphertext can be decrypted under the adversary obtaining the ciphertext. To enhance security, a new PKI→IBC and IBC→PKI scheme is proposed, and then confidentiality and unforgeability of the scheme in the random oracle model on the basis of the assumptions of Computational Diffie-Hellman problem and Bilinear Diffie-Hellman problem is proved. The efficiency analysis shows that the new scheme has higher communication efficiency.
- Heterogeneous signcryption /
- Chosen ciphertext attack /
- Confidentiality /
- Unforgeability

HTML全文

图 1 PKI→IBC签密时间

下载: 全尺寸图片幻灯片

图 2 PKI→IBC解签密时间

下载: 全尺寸图片幻灯片

图 3 IBC→PKI签密时间

下载: 全尺寸图片幻灯片

图 4 IBC→PKI解签密时间

下载: 全尺寸图片幻灯片

表 1 PKI→IBC异构签密性能比较

方案	通信方向	签密	解签密	总运算量	机密性	不可伪造性
文献[14]	PKI→IBC	1E	3P	1E+3P	√	√
文献[15]	PKI→IBC	1E	3P	1E+3P	√	√
文献[16]	PKI→IBC	1E+1P	3P	1E+4P	×	×
文献[16]	IBC→PKI	1E+1P	1E+3P	2E+4P	×	√
本文方案	PKI→IBC	1E+1P	1P	1E+2P	√	√
本文方案	IBC→PKI	0	2P	2P	√	√

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