LSHSC: Lightweight and Secure Handover Scheme With Conditional Privacy-Preserving for Group-Based SDVN

Introducing the SDN paradigm can further improve the handover efficiency of mobile nodes, and researchers have proposed corresponding solutions to the security problems in the handover process. Some existing cryptography-based schemes delegate authentication to the fog nodes to accelerate the handover process, however, the computation and communication overheads are not low enough to satisfy the requirements of delay-sensitive vehicular applications. To realize secure handover of vehicles in software defined vehicular networks (SDVN), in this paper, based on symmetric cryptography, we propose a lightweight and secure handover scheme with conditional privacy-preserving for group-based SDVN. The handover authentication only involves lightweight operation, without based on elliptic curve cryptography or involving complex bilinear pairing operations. After successfully authenticating with the SDN controller, the vehicle can directly authenticate with the fog nodes in the same group. The polynomial and one-way hash chain are used to realize group key update. We use BAN logic and ProVerif to formally analyze and test the security of our scheme. The detailed security analyses show that the scheme can resist common types of attacks and meet the essential security and privacy requirements. Compared with other related and represented works, our scheme exhibits better performance in computation and communication overheads.