SmartCrypt: Enhancing Security for Storing and Sharing Time-Series Data in IIoT

To ensure widespread access, scalability, and sharing capabilities, applications of the Industrial Internet of Things (IIoT) leverage the cloud for storing the data streams they collect. However, the secure storage and sharing of the vast amounts of continuously generated data present significant privacy challenges, including the risk of data breaches. This paper introduces SmartCrypt, a system designed for secure data storage and sharing that facilitates analytics on encrypted time series data. SmartCrypt allows users to securely and selectively share their encrypted data through an innovative symmetric homomorphic encryption method. Simulation results indicate that SmartCrypt decreases query time by 17% and enhances throughput by 9% compared to the benchmark scheme. Furthermore, SmartCrypt's scalability and flexibility make it an attractive solution for various IIoT applications. The system's performance and security features demonstrate its potential for widespread adoption. Future research directions include exploring SmartCrypt's applicability in other domains, such as healthcare and finance.