A Challenge-Response Assisted Authorisation Scheme for Data Access in Permissioned Blockchains

Abstract

Permissioned blockchains can be applied for sharing data among permitted users to authorise the data access requests in a permissioned blockchain. A consensus network constructed using pre-selected nodes should verify a data requester’s credentials to determine if he or she have the correct permissions to access the queried data. However, current studies do not consider how to protect users’ privacy for data authorisation if the pre-selected nodes become untrusted, e.g., the pre-selected nodes are manipulated by attackers. When a user’s credentials are exposed to pre-selected nodes in the consensus network during authorisation, the untrusted (or even malicious) pre-selected nodes may collect a user’s credentials and other private information without the user’s right to know. Therefore, the private data exposed to the consensus network should be tightly restricted. In this paper, we propose a challenge-response based authorisation scheme for permissioned blockchain networks named Challenge-Response Assisted Access Authorisation (CRA3) to protect users’ credentials during authorisation. In CRA3, the pre-selected nodes in the consensus network do not require users’ credentials to authorise data access requests to prevent privacy leakage when these nodes are compromised or manipulated by attackers. Furthermore, the computational burden on the consensus network for authorisation is reduced because the major computing work of the authorisation is executed by the data requester and provider in CRA3.

Evaluation of Correlation between Temperature of IoT Microcontroller Devices and Blockchain Energy Consumption in Wireless Sensor Networks

“…We noted that these algorithms consume large amounts of energy and generate potentially damaging and dangerously high temperatures [ 48 ]. This is an important consideration in the development of energy-efficient IoT blockchain-based low-powered sensor networks [ 49 ]…”

Evaluation of Blockchain Networks’ Scalability Limitations in Low-Powered Internet of Things (IoT) Sensor Networks

“…As per the results, the latency, bandwidth As per the results, we can emphasize that the block transaction rate decreases with the increase in the node number. Most low-powered IoT applications use wireless technologies for data transmission, and the impact of network scalability limitations can be a critical consideration [46]. The deployment of blockchain-based sensor networks also faces the impact of scalability limitations [46].…”

“…Most low-powered IoT applications use wireless technologies for data transmission, and the impact of network scalability limitations can be a critical consideration [46]. The deployment of blockchain-based sensor networks also faces the impact of scalability limitations [46]. As per the results, the latency, bandwidth usage, and data block transaction rates vary based on the blockchain network architecture and number of users.…”

“…The results indicate that the increment of blockchain nodes significantly increases the latency of blockchain networks. The deployment of blockchain-based IoT sensor networks in industries, including healthcare, is critical as the latency or loss of sensitive data can have significant consequences [46]. Also, the latency or loss of sensitive medical data can put lives at risk.…”

“…Also, the latency or loss of sensitive medical data can put lives at risk. It is important to understand the scalability capabilities of different blockchain networks before the deployment of blockchain-based IoT sensor networks in any industry [46]. The results of this research provide an overview of the scalability limitations that can occur with the use of Hydrachain, Monero, and Duino coin blockchain networks.…”