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

Area of Science:

• Cybersecurity
• Medical Informatics
• Blockchain Technology

Background:

• Medical Cyber Physical Systems (MCPS) leverage wireless devices for enhanced healthcare services, but face significant challenges in secure medical data storage and sharing.
• Blockchain technology offers decentralization and tamper-proof features, ideal for securing sensitive health data.
• Existing blockchain solutions struggle with capacity limitations, hindering performance and scalability.

Purpose of the Study:

• To address the security and scalability challenges in blockchain-based MCPS.
• To propose an efficient and secure data sharing mechanism for medical records.
• To ensure the authentication of medical personnel, devices, and applications.

Main Methods:

• A two-layer system model storing medical records off-blockchain and sharing them on-blockchain.
• Development of a novel multi-trapdoor hash function.
• Presentation of a certificateless aggregate signature scheme tailored for blockchain-based MCPS.

Main Results:

• The proposed scheme achieves efficient authentication of medical staff, equipment, and applications.
• Ensures the integrity of medical records and supports secure data storage and sharing.
• Demonstrates high computational and storage efficiency, avoiding complex operations like bilinear maps.

Conclusions:

• The developed certificateless aggregate signature scheme effectively enhances security and efficiency in blockchain-based MCPS.
• This approach provides a robust solution for the secure storage and sharing of medical information, meeting specific healthcare security needs.
• The scheme is computationally efficient and suitable for the Internet of Medical Things (IoMT) applications.