DECENTRALIZED AUTHORIZATION FRAMEWORK FOR EDUCATIONAL SOCIAL IOT USING BLOCKCHAIN

Abstract

The integration of the Social Internet of Things (SIoT) in educational environments has transformed the way smart devices interact to enhance learning experiences. However, ensuring secure, scalable, and decentralized access control remains a significant challenge due to the dynamic nature of SIoT relationships. Traditional access control mechanisms, such as Role-Based Access Control (RBAC) and Attribute-Based Access Control (ABAC), rely on centralized architectures, making them vulnerable to single points of failure and security breaches.
This paper proposes a Decentralized Authorization Framework for Educational Social IoT Using Blockchain, which leverages blockchain technology to provide a tamper-proof and trust-aware access control mechanism. The system integrates social relationship constraints, such as trust levels, interaction frequency, and role-based permissions, into an extended XACML policy model for secure decision-making. Smart contracts deployed on the blockchain ensure transparent, immutable, and self-executing access policies, eliminating reliance on a central authority.
Experimental results demonstrate that the proposed framework improves access control efficiency, security, and adaptability while reducing the risks of unauthorized access. This approach enhances privacy protection, supports real-time authorization decisions, and ensures seamless interoperability in educational SIoT ecosystems. Future research will explore machine learning-based trust evaluation models to further optimize access control policies.