A Smart Contract-based Blockchain Solution in IoT Networks (Published)
The emergence and growing use of advanced technologies has opened up new possibilities for addressing the security challenges of resource-constrained IoT net- works. As IoT devices exchange sensitive data, secure key management is essential for IoT network security, particularly during the key revocation phase. However, current IoT key management solutions require improvements due to the resource limitations of IoT devices. Despite these limitations, existing key revocation solutions still have several areas for improvement, including high communication overheads. Therefore, a decentralized and efficient solution is necessary to address these issues in IoT networks, with a focus on security. This paper proposes a new solution for key revocation based on Blockchain technology using smart contracts to minimize communication overhead and energy consumption in IoT networks. The paper presents a security and performance analysis to assess its correctness. The results indicate that our proposal outperforms other solutions by having a reduced communication overhead of 93.55%, 91.87%, and 99.75% compared to other solutions during the compromising, leaving, and draining cases, respectively. This demonstrates that our solution is efficient and suitable for IoT networks.
Keywords: Blockchain, Internet of Things (IoT), Security, Wireless Sensor Networks (WSNs)., key revocation
Framework for Data Management in Public Service Delivery Applications in Sri Lanka Using Blockchain Technology (Published)
The research paper discusses about how data management issues found in the current Sri Lankan public service delivery systems namely, difficulties in data accessibility, data manipulation possibility, data loss and privacy preservation can be mitigated through the application of Blockchain technology. Three distinct public service delivery systems were analyzed in order to derive a common framework which can be used to design a Blockchain based solution for the public sector processes. Systems were redesigned using Blockchain technology and two prototypes were developed using two different existing platforms and qualitatively evaluated for the four criteria focused by the research. Based on the characteristics extracted from the selected systems, a Generic Guideline was designed comprising the six areas that need to be considered when selecting a Blockchain for Data Management in a Public Service Delivery application and five steps that should be followed in adopting a Blockchain for the specific needs of the government institution.
Keywords: Blockchain, Public Service Delivery Systems