Lightweight Access Authentication Method for Terminal Equipment in Coal Mine Power Monitoring System

To address the security risks of eavesdropping, replay, and tampering that terminal devices in coal mine power monitoring systems may encounter, and given the limited computational and storage resources of these devices, this study proposes a lightweight identity authentication method for terminal devices that incorporates blockchain technology. The proposed scheme capitalizes on the decentralization and immutability features of blockchain to secure data storage and access. It utilizes a lightweight Chebyshev chaotic map in conjunction with a digital signature algorithm to significantly reduce the computational complexity during the device authentication process. Furthermore, the introduction of a token-based mechanism simplifies the re-authentication procedure, whereas terminal devices can swiftly re-authenticate by merely presenting a token, which is subsequently verified for validity by edge nodes. Formal verification using the Scyther tool has demonstrated the protocol's ability to withstand multiple network attacks, meeting the security demands for terminal device authentication in underground settings. Performance comparisons reveal a reduction in computational costs of at least 40.5% and a decrease in communication overhead of at least 20.8% when compared to existing solutions, thus effectively addressing the communication security and real-time performance issues in coal mine power monitoring systems.