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MedExChain: Enabling Secure and Efffcient PHR Sharing Across Heterogeneous Blockchains

Yongyang Lv, Xiaohong Li, Kui Chen, Zhe Hou, Guangdong Bai, Ruitao Feng

TL;DR

MedExChain tackles secure cross-chain sharing of real-time IoMT-generated PHR across heterogeneous blockchains. It blends a proxy re-encryption backbone with Cryptographic Reverse Firewalls and a blockchain audit mechanism, supported by BAN logic, Scyther verification, CPA and ASA security analyses. The scheme significantly reduces computation and communication overhead on IoMT devices while maintaining correctness, confidentiality, and integrity during cross-chain data access and transfer. Extensive theoretical and experimental evaluations demonstrate favorable performance against multiple baselines and robust security properties suitable for cross-chain medical data circulation. This work advances practical cross-chain PHR sharing, enabling real-time, secure, and scalable data access across diverse healthcare blockchains.

Abstract

With the proliferation of intelligent healthcare systems, patients' Personal Health Records (PHR) generated by the Internet of Medical Things (IoMT) in real-time play a vital role in disease diagnosis. The integration of emerging blockchain technologies signiffcantly enhanced the data security inside intelligent medical systems. However, data sharing across different systems based on varied blockchain architectures is still constrained by the unsolved performance and security challenges. This paper constructs a cross-chain data sharing scheme, termed MedExChain, which aims to securely share PHR across heterogeneous blockchain systems. The MedExChain scheme ensures that PHR can be shared across chains even under the performance limitations of IoMT devices. Additionally, the scheme incorporates Cryptographic Reverse Firewall (CRF) and a blockchain audit mechanism to defend against both internal and external security threats. The robustness of our scheme is validated through BAN logic, Scyther tool, Chosen Plaintext Attack (CPA) and Algorithm Substitution Attack (ASA) security analysis veriffcation. Extensive evaluations demonstrate that MedExChain signiffcantly minimizes computation and communication overhead, making it suitable for IoMT devices and fostering the efffcient circulation of PHR across diverse blockchain systems.

MedExChain: Enabling Secure and Efffcient PHR Sharing Across Heterogeneous Blockchains

TL;DR

MedExChain tackles secure cross-chain sharing of real-time IoMT-generated PHR across heterogeneous blockchains. It blends a proxy re-encryption backbone with Cryptographic Reverse Firewalls and a blockchain audit mechanism, supported by BAN logic, Scyther verification, CPA and ASA security analyses. The scheme significantly reduces computation and communication overhead on IoMT devices while maintaining correctness, confidentiality, and integrity during cross-chain data access and transfer. Extensive theoretical and experimental evaluations demonstrate favorable performance against multiple baselines and robust security properties suitable for cross-chain medical data circulation. This work advances practical cross-chain PHR sharing, enabling real-time, secure, and scalable data access across diverse healthcare blockchains.

Abstract

With the proliferation of intelligent healthcare systems, patients' Personal Health Records (PHR) generated by the Internet of Medical Things (IoMT) in real-time play a vital role in disease diagnosis. The integration of emerging blockchain technologies signiffcantly enhanced the data security inside intelligent medical systems. However, data sharing across different systems based on varied blockchain architectures is still constrained by the unsolved performance and security challenges. This paper constructs a cross-chain data sharing scheme, termed MedExChain, which aims to securely share PHR across heterogeneous blockchain systems. The MedExChain scheme ensures that PHR can be shared across chains even under the performance limitations of IoMT devices. Additionally, the scheme incorporates Cryptographic Reverse Firewall (CRF) and a blockchain audit mechanism to defend against both internal and external security threats. The robustness of our scheme is validated through BAN logic, Scyther tool, Chosen Plaintext Attack (CPA) and Algorithm Substitution Attack (ASA) security analysis veriffcation. Extensive evaluations demonstrate that MedExChain signiffcantly minimizes computation and communication overhead, making it suitable for IoMT devices and fostering the efffcient circulation of PHR across diverse blockchain systems.
Paper Structure (64 sections, 15 equations, 9 figures, 4 tables)

This paper contains 64 sections, 15 equations, 9 figures, 4 tables.

Table of Contents

  1. Introduction
  2. Related Works
  3. Medical Data Sharing Based on ABE
  4. Medical Data Sharing Based on SE
  5. Preliminaries
  6. Bilinear Pairing
  7. Cryptographic Reverse Firewalls
  8. BAN Logic
  9. Scyther Tool
  10. System Overview
  11. System Model
  12. Hospital (${\text{Hospital}_\text{i}}$)
  13. Data Owner (DO)
  14. Data User (DU)
  15. Relay-Chain (Relay)
  16. ...and 49 more sections

Figures (9)

  • Figure 1: The model of sharing PHR across chains
  • Figure 2: The MedExChain scheme model
  • Figure 3: Workflow of MedExChain scheme
  • Figure 4: Scyther tool verification results for MedExChain
  • Figure 5: Comparison of Computational Overhead
  • ...and 4 more figures

Theorems & Definitions (4)

  • Definition 1
  • proof
  • Definition 2
  • Definition 3