Open Access

ARTICLE

An Efficient Anti-Quantum Blind Signature with Forward Security for Blockchain-Enabled Internet of Medical Things

Gang Xu^1,2,6, Xinyu Fan¹, Xiu-Bo Chen², Xin Liu⁴, Zongpeng Li⁵, Yanhui Mao^6,7, Kejia Zhang^3,*

1 School of Information Science and Technology, North China University of Technology, Beijing, 100144, China
2 State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing, 100876, China
3 School of Mathematical Science, Heilongjiang University, Harbin, 150080, China
4 School of Digtial and Intelligence Industry, Inner Mongolia University of Science and Technology, Baotou, 014010, China
5 Institute for Network Sciences and Cyberspace, Tsinghua University, Beijing, 100084, China
6 Yunnan Key Laboratory of Blockchain Application Technology, Kunming, 650233, China
7 Yunnan Innovation Institute of Beihang University, Kunming, 650233, China

* Corresponding Author: Kejia Zhang. Email:

Computers, Materials & Continua 2025, 82(2), 2293-2309. https://doi.org/10.32604/cmc.2024.057882

Received 29 August 2024; Accepted 08 November 2024; Issue published 17 February 2025

Abstract

Blockchain-enabled Internet of Medical Things (BIoMT) has attracted significant attention from academia and healthcare organizations. However, the large amount of medical data involved in BIoMT has also raised concerns about data security and personal privacy protection. To alleviate these concerns, blind signature technology has emerged as an effective method to solve blindness and unforgeability. Unfortunately, most existing blind signature schemes suffer from the security risk of key leakage. In addition, traditional blind signature schemes are also vulnerable to quantum computing attacks. Therefore, it remains a crucial and ongoing challenge to explore the construction of key-secure, quantum-resistant blind signatures. In this paper, we introduce lattice-based forward-secure blind signature (LFSBS), a lattice-based forward-secure blind signature scheme for medical privacy preservation in BIoMT. LFSBS achieves forward security by constructing a key evolution mechanism using a binary tree structure. This mechanism ensures that even if future encryption keys are leaked, past data can still remain secure. Meanwhile, LFSBS realizes post-quantum security based on the hardness assumption of small integer solution (SIS), making it resistant to potential quantum computing attacks. In addition, we formally define and prove the security of LFSBS in a random oracle model, including blindness and forward-secure unforgeability. Comprehensive performance evaluation shows that LFSBS performs well in terms of computational overhead, with a reduction of 22%–73% compared to previous schemes.

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Keywords

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