《计算机应用》唯一官方网站 ›› 2023, Vol. 43 ›› Issue (9): 2798-2805.DOI: 10.11772/j.issn.1001-9081.2022081268

• 网络空间安全 • 上一篇    下一篇

NTRU格上基于身份的环签名方案

李金波, 张平(), 张冀, 刘牧华   

  1. 河南科技大学 数学与统计学院,河南 洛阳 471023
  • 收稿日期:2022-08-26 修回日期:2022-11-21 接受日期:2022-12-01 发布日期:2023-01-11 出版日期:2023-09-10
  • 通讯作者: 张平
  • 作者简介:李金波(1997—),男,河南郑州人,硕士研究生,主要研究方向:信息安全、密码学
    张冀(1983—),男,河南洛阳人,高级实验师,博士,主要研究方向:信息安全、编码理论
    刘牧华(1987—),男,河南洛阳人,讲师,博士,主要研究方向:密码学、信息安全、区块链应用。
  • 基金资助:
    国家自然科学基金资助项目(62102134);河南省科技攻关项目(222102210053);河南省教育厅高等学校重点科研项目(21A510003)

Identity-based ring signature scheme on number theory research unit lattice

Jinbo LI, Ping ZHANG(), Ji ZHANG, Muhua LIU   

  1. School of Mathematics and Statistics,Henan University of Science and Technology,Luoyang Henan 471023,China
  • Received:2022-08-26 Revised:2022-11-21 Accepted:2022-12-01 Online:2023-01-11 Published:2023-09-10
  • Contact: Ping ZHANG
  • About author:LI Jinbo, born in 1997, M. S. candidate. His research interests include information security, cryptography.
    ZHANG Ji, born in 1983, Ph. D., senior experimentalist. His research interests include information security, coding theory.
    LIU Muhua, born in 1987, Ph. D., lecturer. His research interests include cryptography, information security, blockchain application.
  • Supported by:
    National Natural Science Foundation of China(62102134);Key Science and Technology Research Project of Henan Province(222102210053);Key Scientific Research Project of Colleges and Universities of Department of Education of Henan Province(21A510003)

摘要:

针对格基环签名方案的陷门基尺寸过大以及环成员的公钥需要数字证书认证的问题,提出一种NTRU(Number Theory Research Unit)格上的身份基环签名方案(NTRU-IBRS)。首先,使用NTRU格上的陷门生成算法生成系统的主公私钥对;然后,将主私钥作为陷门信息并对单向函数进行求逆运算以得到环成员的私钥;最后,基于小整数解(SIS)问题使用拒绝抽样技术生成环签名。安全性分析表明,NTRU-IBRS在随机预言机模型下具有匿名性以及适应性选择消息和身份攻击下的存在不可伪造性。性能分析与实验仿真表明,与理想格上的环签名方案和NTRU格上的身份基可链接环签名方案相比,在存储开销方面,NTRU-IBRS的系统私钥长度下降了0~99.6%,签名私钥长度的下降了50.0%~98.4%;在时间开销方面,NTRU-IBRS的总时间开销减少了15.3%~21.8%。将NTRU-IBRS应用于动态车联网(IoV)场景中,模拟结果表明NTRU-IBRS在车辆交互期间能够同时保证隐私安全和提高通信效率。

关键词: NTRU格, 身份基环签名, 小整数解问题, 拒绝抽样技术, 车联网

Abstract:

Concerning the problems that the size of the trapdoor base is too large and the public key of ring members needs digital certificate authentication in the lattice-based ring signature schemes, an NTRU (Number Theory Research Unit) lattice-based Identity-Based Ring Signature scheme (NTRU-IBRS) was proposed. Firstly, the trapdoor generation algorithm on NTRU lattice was used to generate the system master public-private key pairs. Secondly, the master private key was taken as the trapdoor information and the one-way function was reversely operated to obtain the private key of every ring member. Finally, based on the Small Integer Solution (SIS) problem, the ring signature was generated by using the rejection sampling technology. Security analysis shows that NTRU-IBRS is anonymous and existentially unforgeable under adaptive chosen message and chosen identity attacks. Performance analysis and experimental simulation show that compared with the ring signature scheme on ideal lattice and the identity-based linkable ring signature scheme on NTRU lattice: in storage overhead, NTRU-IBRS has the system private key length decreased by 0 to 99.6% and the signature private key length decreased by 50.0% to 98.4%; and in time overhead, NTRU-IBRS has the total time overhead reduced by 15.3% to 21.8%. Simulation results of applying NTRU-IBRS to the dynamic Internet of Vehicles (IoV) scenario show that NTRU-IBRS can ensure privacy security and improve communication efficiency during vehicle interaction at the same time.

Key words: NTRU (Number Theory Research Unit) lattice, identity-based ring signature, Small Integer Solution (SIS) problem, rejection sampling technology, Internet of Vehicles (IoV)

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