A Conic Curve Digital Signature with Blockchain Mechanism for Securing EHR Data in IOT-Fog-Cloud Environments

Abstract

The use of Internet of Things (IoT) technology and cloud computing in healthcare, outsourcing Electronic Health Records (EHRs) created by IoT devices becomes an important issue. In a real-time scenario, since EHRs might be gathered by multiple divisions within a hospital and sent over intranet or public networks, the situation raises risks for privacy breaches. Many existing studies use cloud-based access control and encryption methods to safeguard outsourced EHRs. Nonetheless, in an IoT cloud data-sharing environment where data comes from a variety of devices and user permission status changes often, there is still a gap in achieving the complete and systematic integration of secure IoT data transmission and aggregation. Furthermore, advances in attack tactics and resources may eventually compromise any cryptographic system based on a single mathematical flaw. By designing methods that rely on a variety of challenging factors, the system is safeguarded even if one of them is compromised. Therefore, this manuscript presents a new Conic Curve Digital Signature with Blockchain (CCDSB-Chain) system for securing EHR data in IoT-Fog-Cloud environments. In this system, Conic Curve-Based Encryption with Digital Signature (CCBE-DS) is proposed, which uses blockchain and fog-cloud computing to safely manage EHR data. This system collects data from IoT devices, processes and encrypts it at fog nodes, and then securely stores it on the blockchain. Access to critical information is meticulously regulated by preset attribute sets, guaranteeing that only authorized individuals may access the data. Furthermore, the experimental results show that the proposed CCDSB-Chain enhances EHR data security, reduces computational costs, and maximizes access efficiency.