Two-Level Identity-Based Encryption Scheme for Internet of Things

In the application layer of the Internet of Things, there are multiple levels of user identities in the user management system. When the cloud and intelligent connected devices exchange big data among users, the sensitive data transmitted in the IoT are vulnerable to attackers. Therefore, how to build a secure Internet of Things data encryption scheme based on the identity level of the user is a critical issue. In this paper, we present a two-level identity-based encryption scheme for the hierarchical management system of the Internet of Things. The correctness and security of the scheme are analyzed. Compared with the lattice-based encryption scheme, our scheme has smaller keys and ciphertexts. To avoid the high computational complexity caused by the trapdoor delegation algorithm, our scheme is an efficient and practical two-level identity-based encryption scheme for the Internet of Things.