Computers and Electrical Engineering
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Date
2023
Journal Title
Journal ISSN
Volume Title
Publisher
Université de M'sila
Abstract
In Cooperative Intelligent Transport Systems (C-ITS), vehicles and Road Side Units (RSU)
exchange various messages about safety, traffic control, and weather conditions. These messages
are broadcast to all neighbors. Each message should be authenticated and should protect
users’ privacy, mainly by hiding their locations. The authentication is achieved by signing
messages using a private key related to the Pseudonym Certificate (PC), provided by a Trusted
Authority (TA). The PC is delivered together with messages so that receivers can authenticate
the messages. Privacy is ensured by changing PCs many times during a journey, so that trackers
cannot get drivers’ traces. This paper proposes a novel approach to manage PC switching
periods between vehicles. The proposed method uses a Common PC (CPC) during a short period
before switching to a new PC. Vehicles use the same shared PC during this period to sign their
messages. Simulations have been conducted in an OMNET++ environment, showing significant
improvement in privacy protection compared to well-known privacy schemes
Description
Keywords
C-ITS Privacy Authentication Anonymity Security