A novel authentication scheme for PIoT based on aggregate signature
Ziying Wang, Zhimin Gu, Chao Zhou, Wenbo Zhang, Jingyu Feng · 2023
Secure access of massive terminals in PIoT is the key to realize the secure transmission of power information. However, the power system mostly adopts the certificate-based terminal access solutions, which need to query and verify the legitimacy of the certificate during authentication. The heavy burden of certificate management limits the application of low-cost and resource constrained terminals in PIoT. The SM9 algorithm takes user’s ID as the public key, omits the certificate management. The key escrow also meets the supervision needs of the superior and subordinate in power system. Based on the analysis of the security threats faced by huge amounts of terminal secure access, a three-layer framework is constructed for PIoT. The access layer sets up authentication nodes to manage the secure access processes of terminals. Aiming at the low efficiency problem of signature verification when a large number of terminals access, a SM9-based aggregation signature scheme is designed. The authentication node is responsible for aggregating multiple terminals’ signatures into one signature. Compared with other identity-based aggregated signature schemes, the proposed scheme is efficient in terms of computational performance.