Secure Online/Offline Attribute-Based Encryption for IoT Users in Cloud Computing
To ensure the security of mass data sharing in the Internet of Things, the cloud computing platform is supposed to provide data-storage services. The ciphertext-policy attribute-based encryption (CP-ABE) schemes has attracted wide-scale attention since users can access the cloud platform in a fine-grained manner. However, there are still some problems in the existing CP-ABE schemes when directly applied in the Internet of Things environment. The problem of simultaneously achieves large computational cost in the encryption and decryption. Moreover, the privacy of access control policy actually still remains unresolved. To fill the gap of the existing schemes, this paper proposes a suitable data sharing scheme for IoT devices which can’t always be online. We use the online/offline CP-ABE technology with privacy, while hiding the access control structure and reducing the computational cost of the devices when they are online. The asymptotic complexity comparison also shows that our scheme achieves high computation efficiency.
KeywordsInternet of Things Cloud computing Online/offline encryption Privacy protection Hidden access structure
This research is supported by the National Natural Science Foundation of China under Grant Nos. U1536115 and U1405254, the Natural Science Foundation of Fujian Province of China under Grant No. 2018J01093, and the Subsidized Project for Postgraduates’ Innovative Fund in Scientific Research of Huaqiao University No. 18013083012.
- 1.Goyal, V., Pandey, O., Sahai, A., Waters, B.: Attribute-based encryption for fine-grained access control of encrypted data. In: Proceedings of the 13th ACM Conference on Computer and Communications Security - CCS 2006, Alexandria, Virginia, USA, pp. 89–98. ACM Press (2006)Google Scholar
- 2.Bethencourt, J., Sahai, A., Waters, B.: Ciphertext-policy attribute-based encryption. In: 2007 IEEE Symposium on Security and Privacy (SP 2007), pp. 321–334 (2007)Google Scholar
- 3.Yu, S., Wang, C., Ren, K., Lou, W.: Achieving secure, scalable, and fine-grained data access control in cloud computing. In: 2010 Proceedings IEEE INFOCOM, pp. 1–9 (2010)Google Scholar
- 6.Green, M., Hohenberger, S., Waters, B.: Outsourcing the decryption of ABE ciphertexts, 16Google Scholar