Enforcing Fine-Grained Access Control in Smart Homes via Blockchain and Biometric-Based Smart Contracts

Abstract

The adoption of smart home technologies has increased and that it is needed to have robust and fine-grained access control mechanism to protect on the sensitive data and stop drop privacy. In this research, we propose new framework mining blockchain technology, smart contracts that enforce granular access control in smart home environments based on biometric smart contracts. Blockchain's immutable ledger, together with the characteristics of its decentralized architecture, make blockchain a secure storage for access logs, using biometric confirmation to further identify the owner of the account and minimize the risks of the unauthorized accesses. Access policies are dynamically managed and validated by smart contracts, which allows it to make real time decision. The proposed system is experimentally evaluated and the proposed system reliably improves security with just a 96.2% success rate of enforcing access control latency less than 1.5 seconds. One of the future works will be to scale the system and incorporate adaptive learning model to adjust the access policies.