Blockchain-Based Privacy-Preserving Cross-Domain Authentication Protocol

doi:10.3969/j.issn.1671-1122.2025.12.010

Abstract

Abstract:

In the Internet of things environment, cross-domain authentication faces the problems of privacy protection and reliance on a trusted third party. To address these challenges, a blockchain-based privacy-preserving cross-domain authentication protocol was proposed. With the support of blockchain technology, this protocol realized identity authentication and key exchange between entities in different parameter domains, and effectively reduced the performance burden of the server and the user. Specifically, the user’s biometric vector was generated by the fuzzy extractor to generate a secret value, and the key was calculated by combining the lattice encryption technology, so as to complete the implicit identity authentication while protecting the user’s biometric privacy. In addition, the pseudo-identity, public key and public parameters of each trust domain generated by the user in the process of cross-domain access were uploaded to the blockchain to ensure the correctness of the verification results and the non-repudiation of the behavior of the participants in the protocol. In the random oracle model, based on the decisional learning with error problem and the discrete logarithm problem, the semantic security of the protocol under the polynomial adversary ability was proved. Compared with the similar protocols, the proposed protocol is compatible with the existing security mechanisms, and has low computation and communication overhead, thus providing a new solution for cross-domain authentication with high efficiency and security.

Key words: biometric authentication, privacy preserving, blockchain, cross-domain authentication

CLC Number:

TP309

ZHANG Guanping, WEI Fushan, CHEN Xi, GU Chunxiang. Blockchain-Based Privacy-Preserving Cross-Domain Authentication Protocol[J]. Netinfo Security, 2025, 25(12): 1948-1960.

Figures/Tables 10

References 25

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参数符号	说明
$q$	生物特征向量分量取值参数
${{q}_{1}}$	安全参数所生成的大素数
${{G}_{1}}$	阶为${{q}_{1}}$的循环群
${{g}_{1}}$	群${{G}_{1}}$的生成元
$m$	模糊提取器输出秘密值的向量维数
$l$	选取的随机向量维数
${{H}_{1}}$	哈希函数${{H}_{1}}:{{\{0,1\}}^{}}\to {{\{0,1\}}^{}}$
${{H}_{2}}$	哈希函数${{H}_{2}}:F_{q}^{l}\to {{\mathbf{Z}}_{q}}$
${{H}_{3}}$	哈希函数${{H}_{3}}:G\times {{\{0,1\}}^{}}\to {{\{0,1\}}^{}}$
$P{{K}_{\text{A}}}$	长期公钥$P{{K}_{\text{A}}}=g_{1}^{s{{k}_{\text{A}}}}$，$s{{k}_{\text{A}}}$是私钥

功能与安全属性	文献[5]方案	文献[8]方案	文献[11]方案	本文协议
抗重放攻击	—	√	√	√
抗仿冒攻击	√	√	√	√
抗内部攻击	√	—	—	√
前向安全性	√	√	√	√
匿名性	√	√	√	√
身份追踪	√	√	√	√
参数兼容性	—	√	√	√

运算操作	符号表示	平均耗时/ms
哈希	hash	0.046
椭圆曲线点加	pa	0.263
椭圆曲线标量乘	pm	0.270
乘方	exp	0.283
双线性配对	bp	1.703
调用链码	cc	0.110

方案	hash /次	pa /次	pm/次	exp/次	bp /次	cc /次	总耗时/ms
文献[5]方案	10	2	9	4	6	2	14.986
文献[8]方案	8	2	大于10	大于50	6	2	大于28.182
文献[11]方案	23	6	19	8	11	3	29.093
本文协议	14	0	0	11	0	2	3.977

方案	发包数量/个	峰值通信量/B	总通信量/B
文献[5]方案	14	164	952
文献[8]方案	12	大于1388	大于2196
文献[11]方案	16	168	1192
本文协议	5	168	592