A Novel Proxy Based Reencryption Scheme for Secured Data Communication by Using Internet of Things (IoT) and BlockChain Technologies

This paper proposes a novel proxy-based re-encryption (PRE) scheme for secured data communication in the Internet of Things (IoT) environment, integrated with blockchain technology to enhance data privacy and security. The scheme employs identity-based encryption (IBE) to streamline key management and ensures efficient data sharing by leveraging blockchain for decentralized access control. Proxy servers, acting as intermediaries, handle resource-intensive computations, reducing the load on resource-constrained IoT devices. The system was evaluated across multiple parameters, including encryption, decryption, and re-encryption times, communication overhead, and computational cost. Results demonstrated that the system scales efficiently with data sizes, with encryption times increasing linearly from 5ms to 60ms for data sizes ranging from 10 KB to 100 KB. The re-encryption times followed a similar trend, ranging from 8ms to 60ms. Accuracy in maintaining secure data access control was recorded at 98.5%, ensuring that unauthorized access was effectively prevented. Communication overhead was minimal, with only a 3–12 KB increase across different data sizes due to the additional security features.