 Vanits, vehicular ad hoc networks, are networks of connected intelligent vehicles that can communicate with each other, as well as with infrastructure and fixed roadside equipment. Security is critical when sending packets due to the lack of fixed infrastructure and open access environment. Secure routing protocols have been proposed for Vanits, but most focus on authenticating nodes and creating a secure route, without considering confidentiality after the route is created. To address this issue, we propose a secure routing protocol called Secure Greedy Highway Routing Protocol, GHRP. This protocol uses a chain of source keys validated by a one-way function to provide increased confidentiality over other protocols. Additionally, it uses a hashing chain to authenticate the source, destination, and intermediate nodes. Furthermore, to prevent routing attacks such as black hole attacks, the protocol is based on the GHRP routing protocol. Simulation results show that the proposed protocol outperforms the SOV protocol in terms of packet delivery rate, overhead, and average end-to-end delay. This article was authored by Edris Kezri, Esmail Zainali, and Hadi Sargozzi. We are article.tv, links in the description below.