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Vehicular ad hoc networks (VANETs) have become a promising application of mobile ad-hoc networks (MANETs). Since an inaccurate traffic warning message will impact drivers' decisions, and misguide drivers' behavior, one of the main challenges in VANETs is to forward messages in such a way that the information content can be trusted by receiving nodes. In this paper, we proposed a reputation management...
VANETs continue to mature and their installation is becoming a reality. Many ideas have been exchanged on how best to balance privacy and security. The use of pseudonyms has been almost universally accepted as a critical part of this equation. Simulated results, using ns-3, demonstrate the need for more than a single road side unit (RSU) contact for pseudonym refill due to the limited number of certificates...
In order to deploy vehicular communication system, security and privacy issues have to be resolved. In this paper, for achieving secure and privacy preserving communications, an easily implementable PKI-based protocol is proposed. Security requirements for vehicular communications are defined and a detailed definition of the scheme, which uses shared asymmetric keys and PKI techniques to provide anonymous...
We define an ad hoc transportation system as one that has no infrastructure such as roads (and lanes), traffic lights etc. We assume that in such a system the vehicle are autonomic and can guide and direct themselves without a human driver. In this paper we investigate how a safe distance can be maintained between vehicles. A vehicle which has been compromised by an adversary can cause serious chaos...
Before the deployment of any vehicular communication system, security and privacy issues have to be resolved. In this paper, for achieving secure and privacy preserving communications, an easily implementable PKI-based protocol is proposed. Security requirements for vehicular communications are defined and a detailed definition of the scheme, which uses shared asymmetric keys and PKI techniques to...
We propose a framework for a secure RSU-to-OBU message broadcasting in VANETs using proxy signatures. We consider a VANET infrastructure for which the network assumptions are similar to the current standards of VANET communications. The main purpose of our scheme is to provide message integrity, authenticate the broadcast messages, and authenticate the RSU to the OBUs. We set the appropriate liabilities...
A considerable number of Vehicular Network (VN) applications have been developed recently. These applications range from security and safety to traffic information and service location. However, several research challenges remain open concerning efficient service discovery in large scale VNs. Most of the existing service discovery strategies present high overhead and poor performance when applied...
In this paper, we propose a secure data downloading protocol with privacy preservation in vehicular ad hoc networks (VANETs). In the data downloading application, vehicles send requests, such as where is the nearest gas station, at a road side unit (RSU) and receive the corresponding responses from application servers via current or the following RSUs. It would be easy for eavesdroppers to get vehicles'...
Privacy is an important requirement in vehicle networks, because vehicles broadcast detailed location information. Also of importance is accountability due to safety critical applications. Conditional pseudonymity, i.e., usage of resolvable pseudonyms, is a common approach to address both. Often, resolvability of pseudonyms is achieved by authorities maintaining pseudonym- identity mappings. However,...
Vehicular ad hoc networks, also known as VANETs, enable vehicles which are not necessarily within the same radio transmission range to communicate with each other. In addition to allowing direct communication between vehicles, VANETs also enable vehicles to connect to Roadside Units (RSUs) which are inexpensive infrastructure that have the capability of communicating with each others and with passing...
The security of Vehicular Ad Hoc Networks (VANET) has mostly directed the attention of today research efforts, while comprehensive solutions to protect the network from adversary and attacks still need to be improved, trying to reach a satisfactory level, for the driver and manufacturer to achieve safety of life and infotainment. The need for a robust VANET networks is strongly dependent on their...
Existing authentication protocols to secure vehicular ad hoc networks (VANETs) raise challenges such as certificate distribution and revocation, avoidance of computation and communication bottlenecks, and reduction of the strong reliance on tamper-proof devices. This paper efficiently copes with these challenges with a decentralized group-authentication protocol in the sense that the group is maintained...
Many results have been published in the literature based on performance measurements obtained from simulations of vehicular networks (VANETs). These simulations use as input traces of vehicle movements that have been generated by traffic simulators which are based on traffic theory models. To our knowledge, no one has published any work based on actual large-scale recordings of vehicle movements....
Intelligent Transportation system (ITS) using wireless and mobile ad-hoc sensor network has inspired many autonomous applications. Vehicular Ad-hoc network (VANET) is an emerging technology where vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communicate wirelessly using dedicated short-range communication band. In sensor based VANET (S-VANET) issues like response time, data aging, bandwidth,...
In this paper, we propose a timestamp series approach to defend against Sybil attack in a vehicular ad hoc network (VANET) based on roadside unit support. The proposed approach targets the initial deployment stage of VANET when basic roadside unit (RSU) support infrastructure is available and a small fraction of vehicles have network communication capability. Unlike previously proposed schemes that...
Vehicular ad hoc network (VANET) is an emerging type of networks to allow vehicles on roads to communicate for driving safety. An vehicle can broadcast messages (e.g. accident information) to other vehicles. These messages may have impact on other vehicles as well as the traffic control system, so all messages must be signed and authenticated. On the other hand, privacy should be enforced while the...
Vehicular networking (VN) has reached a high level of maturity, but security mechanisms have only recently been explored. The nature of VNs requires that nodes not behaving as expected should be detected without delay and eliminated to avoid possibly fatal traffic accidents. This paper redefines and explores the problem of estimating the vulnerability window as the time it takes to detect and eliminate...
Vehicular ad hoc networking is an important component of Intelligent Transportation Systems. The main benefit of vehicular ad hoc network (VANET) communication is seen in active safety systems that increase passenger safety by exchanging warning messages between vehicles. Other applications and private services are also permitted in order to lower the cost and to encourage VANET deployment and adoption...
The main benefit of vehicular communication is seen in active safety systems that increase passenger safety by exchanging warning messages between vehicles. Other applications and private services are also permitted in order to lower the cost and to encourage vehicular network deployment and adoption. The allocation of 75 MHz in the 5.9 GHz frequency band licensed for dedicated short range communications...
Vehicular Ad Hoc network (VANET) can offer various services and benefits to VANET users and thus deserves deployment effort. Misusing such network could cause destructive consequences. It is therefore necessary to discourage misbehavior and defend VANET systems against it, in order to ensure correct and smooth operations of the network. In this paper, we propose a defense technique to handle misbehavior...
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