DECENTRALIZED AUTHORIZATION FRAMEWORK FOR EDUCATIONAL SOCIAL IOT USING BLOCKCHAIN

Abstract

The integration of the Social Internet of Things(SIoT) in educational environments hastrans formed the way smart devices interact toenhance learning experiences. However, ensuring secure, scalable, and decentralized access control remains a significant challenge due to thedynamic 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 SociIoT Using Blockchain, which leveragesblockchain technology to provide a tamper-proof and trust-aware access control mechanism. Thesystem integrates social relationship constraints,such as trust levels, interaction frequency, androle-based permissions, into an extendedXACML policy model for secure decision-making. Smart contracts deployed on the blockchain ensure transparent, immutable, andself-executing access policies, eliminatingreliance on a central authority. Experimental results demonstrate that theproposed framework improves access controlefficiency, security, and adaptability whilereducing the risks of unauthorized access. Thisapproach enhances privacy protection, supportsreal-time authorization decisions, and ensureseamless interoperability in educational SIo Tecosystems. Future research wilexplore machine