An Efficient Revocable Identity-Based Aggregate Signature Scheme With Designated Verifiers in Healthcare Wireless Sensor Networks
Wenjie Yang, Junzhe Fan, Futai Zhang, Anjia Yang, Zhiquan Liu · IEEE Internet of Things Journal · 2025
In healthcare wireless sensor networks (HWSNs), a process of medical diagnosis heavily relies on the medical data collected by lightweight sensors, as any malicious modification may result in severe consequences. Furthermore, large-scale data transmission in HWSNs would impose significant communication overhead. Therefore, efficiently guaranteeing the availability of these data while reducing the communication cost is crucial in HWSNs. Aggregate signatures suit the resource-limited environments, but existing ones still face several challenges, including vulnerability to coalition attacks, privacy preservation, and revocation of misbehaving signers. In this paper, we propose an efficient revocable identity-based aggregate signature scheme with designated verifiers (R-IBAS-DV) for HWSNs. In our proposed scheme, numerous individual signatures on the collected medical data can be aggregated into a succinct aggregate signature and their validity is equivalent to that of the aggregate signature. The equivalence property of our proposed scheme is sound even under coalition attacks and exclusively verifiable by designated healthcare professionals. Meanwhile, our proposed scheme is rooted in Hess’s practical identity-based signature, thereby circumventing costly certificate management. Additionally, it incorporates RSA accumulators to facilitate the efficient revocation of malicious signers. Security analysis and performance comparisons demonstrate that our R-IBAS-DV scheme offers enhanced security and lower computation overhead, making it particularly suitable for resource-constrained HWSNs.