Abstract
Thanks to the rapid development of vehicle-to-everything (V2X) and sensor technology, states of vehicles can be accurately measured and stored jointly in the cloud. These states can be viewed as a set of infinite attributes, such as the density around the motor vehicle, signal strength and so on. As such, the vehicle can be viewed as a moving object. The vehicle state can be measured, and its entropy is large. In vehicle networking, unicast communications between vehicles must be encrypted. The previous approach was to negotiate a session key through the Diffie-Hellman algorithm and then use the session key to encrypt the communications. This method not only needs to know in advance the peer IP of the communication, but it also needs a long time to establish a session key. Therefore, it is not suitable for vehicle networking. For the fast-changing vehicle networking, the session key establishment process should be shortened or even canceled. In this paper, we propose a method of Negotiation-free encryption for securing vehicular unicasting communications to improve the efficiency of vehicle ad hoc network transmissions.
Highlights
Vehicular Ad hoc Networks (VANETs) are special wireless networks which are designed to meet the needs of vehicular communications
VANET plays an important role in futrue Intelligent Transport System IntelligentTransport System (ITS), secure trade-off between vehicles is very important as VANET supports safety-related applications
The On-board Unit (OBU) is comprised of a hardware security module that is responsible for encrypting the data, storing the status information, positioning and other operations
Summary
Vehicular Ad hoc Networks (VANETs) are special wireless networks which are designed to meet the needs of vehicular communications. We propose a negotiation-free encryption method (NFEM) to reduce the preparatory work before the data transmission and achieve high efficiency and safety. As for the NFEM, we use the vehicle state attribute value as a packet encryption key to replace the traditional IPSec key negotiation and management stage. In the NFEM, the vehicle needs to request the historical state value of itself from the cloud, which is equivalent to obtaining the decryption key and does not require the parties to negotiate. It considerably reduces the negotiation and validation overhead.
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