

FOLLOWUS
State Key Laboratory of Integrated Services Networks, Xidian University, Xi'an 710071, China
School of Mathematics and Statistics, Minnan Normal University, Zhangzhou 363000, China
School of Cyberspace Security, Xi'an University of Posts & Telecommunications, Xi'an 710061, China
Jiang-shan CHEN, E-mail: JSChen@mnnu.edu.cn
Received:27 June 2019,
Revised:2020-;5-28,
Published Online:02 July 2020,
Published:2021-02
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Jiang-shan CHEN, Yu-pu HU, Hong-mei LIANG, et al. Novel efficient identity-based signature on lattices[J]. Frontiers of Information Technology & Electronic Engineering, 2021, 22(2): 244-250.
Jiang-shan CHEN, Yu-pu HU, Hong-mei LIANG, et al. Novel efficient identity-based signature on lattices[J]. Frontiers of Information Technology & Electronic Engineering, 2021, 22(2): 244-250. DOI: 10.1631/FITEE.1900318.
随着电子信息技术的飞速发展,数字签名已成为人们生活中不可或缺的一部分。由于证书管理的局限性,传统的公钥证书密码系统无法满足现有需求。基于身份的密码系统避免了证书管理问题。量子计算机的发展给传统密码学带来严峻挑战。后量子密码学研究势在必行。目前,几乎所有后量子基于身份的签名方案都是利用高斯采样技术或陷门技术构建的。但是,这两种技术对计算效率有很大影响。为克服该问题,采用Lyubashevsky签名方案构造了格上基于身份的签名方案。基于格上的最短向量问题,该方案既不使用高斯采样技术也不使用陷门技术。在随机谕言机模型中,可以证明该方案对适应性选择的消息和身份攻击是不可伪造的。其安全性级别是强不可伪造的,比其他方案存在性不可伪造的安全性更高。与其他有效方案相比,所提方案在计算复杂度和安全性方面具有优势。
With the rapid development of electronic information technology
digital signature has become an indispensable part of our lives. Traditional public key certificate cryptosystems cannot overcome the limitations of certificate management. Identity-based cryptosystems can avoid the certificate management issues. The development of quantum computers has brought serious challenges to traditional cryptography. Post-quantum cryptography research is imperative. At present
almost all post-quantum identity-based signature (IBS) schemes are constructed using Gaussian sampling or trapdoor technologies. However
these two technologies have a great impact on computational efficiency. To overcome this problem
we construct an IBS scheme on lattices by employing Lyubashevsky's signature scheme. Based on the shortest vector problem on lattices
our scheme does not use Gaussian sampling or trapdoor technologies. In the random oracle model
it is proved that our scheme is strongly unforgeable against adaptive chosen messages and identity attacks. The security level of our scheme is strongly unforgeable
which is a higher level than the existential unforgeability of other schemes. Compared with other efficient schemes
our scheme has advantages in computation complexity and security
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