SMART-CONTRACT-BASED AUTHENTICATION AND DATA INTEGRITY FRAMEWORK FOR RESOURCE-CONSTRAINED IOT DEVICES
Keywords:
Internet of Things, blockchain, smart contract, device authentication, data integrity, edge gateway, off-chain storage, cybersecurity, audit ledger.Abstract
The rapid expansion of Internet of Things (IoT) ecosystems has increased the need for lightweight, transparent and verifiable security mechanisms. Resource-constrained IoT devices often operate with limited memory, processing power and energy capacity, while they exchange sensitive telemetry and control data in real time. This paper proposes a smart-contract-based authentication and data integrity framework that combines device identifiers, edge gateway pre-validation, cryptographic hashes, off-chain storage and an immutable blockchain audit ledger. The framework is designed to reduce dependence on a centralized server, verify device legitimacy before data exchange and provide evidence-based auditability of IoT security events. An algorithmic model, mathematical representation and analytical evaluation are presented. The results indicate that the proposed approach can improve authentication transparency, data integrity control and audit completeness while keeping blockchain load manageable through hybrid on-chain/off-chain storage.
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