A Privacy-Preserving Blockchain Scheme for the Reliable Exchange of IoT Data

The Internet of Things (IoT) system has been claimed to deliver comfort and a more satisfactory lifestyle. The data flows that connect IoT sub-systems are critical to the success of the whole system. However, there are concerns about how privacy-preserving these flows are. Most existing single-server architecture solutions to the privacy problem have limitations regarding user privacy and anonymity. They may lead to revealing users’ regular activities and affects their integrity and confidentiality. Despite Blockchain technology is suitable for improving IoT systems’ security and privacy, there is a lack of privacy protection in blockchain when accessing personal user data due to privacy threats from internal parties. Thus, we aim to build a protected environment for users to exchange data and maintain privacy with an efficient authentication solution. We consider Blockchain technology using Elliptic Curve Integrated Encryption Scheme (ECIES) and message authentication regulation to enhance security and privacy for the transmitted data. This provides reliable auditing of the users’ access history and efficient authentication within the system. We evaluate the outcomes to show the usefulness of this approach, targeting IoT data, and compare it with current work in the field.