An Efficient Certificateless Aggregate Signature Scheme for Blockchain-Based Medical Cyber Physical Systems

Abstract

Different from the traditional healthcare field, Medical Cyber Physical Systems (MCPS) rely more on wireless wearable devices and medical applications to provide better medical services. The secure storage and sharing of medical data are facing great challenges. Blockchain technology with decentralization, security, credibility and tamper-proof is an effective way to solve this problem. However, capacity limitation is one of the main reasons affecting the improvement of blockchain performance. Certificateless aggregation signature schemes can greatly tackle the difficulty of blockchain expansion. In this paper, we describe a two-layer system model in which medical records are stored off-blockchain and shared on-blockchain. Furthermore, a multi-trapdoor hash function is proposed. Based on the proposed multi-trapdoor hash function, we present a certificateless aggregate signature scheme for blockchain-based MCPS. The purpose is to realize the authentication of related medical staffs, medical equipment, and medical apps, ensure the integrity of medical records, and support the secure storage and sharing of medical information. The proposed scheme is highly computationally efficient because it does not use bilinear maps and exponential operations. Many certificateless aggregate signature schemes without bilinear maps in Internet of things (IoT) have been proposed in recent years, but they are not applied to the medical field, and they do not consider the security requirements of medical data. The proposed scheme in this paper has high computing and storage efficiency, while meeting the security requirements in MCPS.

A Cross‐Domain Authentication Optimization Scheme between Heterogeneous IoT Applications

“…To validate the performance of the proposed DSP-CCAS cross-domain authentication processing, it includes identity signature time, signature verification time, authority verification time, and communication volume. Compare the proposed scheme (the certificate-less crossdomain authentication scheme DSP-CCAS that supports different system parameters) with the existing blockchainbased certificate-less cross-domain authentication schemes, including IRBA proposed by Jia et al [34] and MCPSP proposed by Shu et al [35]. From the comparison of the two indicators of computation time consuming and communication cost, three authentication schemes were loaded on the simulation experiment platform, and two security domains were selected for 100 cross-domain requests, and the average value was taken compare.…”

“…Shu et al [35] described a two-tier system model for medical data sharing, in which medical records are stored outside the blockchain and shared in the blockchain. In this model, a blockchain-based MCP certificate-less set signature scheme is proposed by using the proposed multinotch hash function.…”

Computer-Aided-Diagnosis as a Service on Decentralized Medical Cloud for Efficient and Rapid Emergency Response Intelligence

“…Dai et al [ 20 ] proposed a blockchain-enabled Internet of Medical Things (IoMT) to address the security and privacy concerns of IoMT systems. Shu et al [ 21 ] proposed a certificate-less scheme, which offers secure storage for sharing medical data on the blockchain. They stated that their scheme would satisfy the security requirements (integrity, privacy, and traceability) in medical cyber-physical systems (MCPS).…”

A Decentralized Threshold Signature Scheme of Blockchain-Based Medical Cyber Physical Systems

“…In the medical cyber physical system, patient's medical data security and privacy can not be ignored. Data security means the integrity, validity and authenticity of medical data [3]. The safe storage, transmission, and access of the medical cyber physical system are the most important guarantee for medical data sharing and informatization, ensuring the data that can complete the medical diagnosis and treatment without leakage, loss, or tampering.…”