Forward Secure Data Sharing Based on Proxy Re-Encryption in Industrial Internet of Things

Le résumé fourni par la source

In the Industrial Internet of Things (IIoT), data is shared among different production segments for collaborative production. However, industrial production processes often involve corpus sensitive information, and during data sharing, every flow of data between different subjects increases its exposure to vulnerabilities. Proxy re-encryption offers a practical approach to enabling secure data exchange, thereby partially mitigating the tension between information sharing and privacy protection. Many scholars have proposed data-sharing schemes utilizing proxy re-encryption technologies. However, existing schemes still face issues, such as excessive communication and computational overhead, and cannot guarantee forward security. Therefore, this study proposes a lightweight and forward-secure data-sharing scheme. First, the proxy generates the re-encryption key, substantially alleviating the overhead on the data owner. Second, whenever the time node changes or a data user is revoked, the data user loses access to historical data, which effectively ensures forward security. The security proof confirms the scheme’s IND-CPA security under the DBDH assumption. Performance analyses reveals that the proposed scheme achieves higher security in data sharing with a lower computational overhead.

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