Vehicular ad hoc networks (VANETs) are a type of mobile network that forms unified wireless communication between vehicles and roadside nodes. Roadside units (RSUs), as the infrastructure key component VANETs, play critical role in improving performance VANETs. Their deployment can effectively improve network. The goal RSU (RSUD) problem is to install few RSUs possible on both sides roads or in...

Information dissemination in vehicular ad hoc networks (VANETs) is inseparable from the interaction between vehicles and infrastructure. The trust authority (TA) often plays a pivotal role VANETs requires with multiple vehicles. However, when TA sends same message to vehicles, there are many redundancies, as it needs negotiate each vehicle send them different ciphertexts. This greatly reduces w...

<p>The traffic congestion in vehicular adhoc networks (VANETs) is a vital problem due to its dynamic increase loads. VANETs undergo inefficient routing capability increasing demands. This has led the need for intelligent transport system (ITS) assist enabling suitable loads between vehicles and road side units (RSU). Most conventional systems offer distributed solution manage but fail regul...

Intelligent Transportation Systems (ITS), which rely on vehicular ad hoc communication networks (VANETs), have the potential to alleviate road accidents and to save lives. Several use cases to VANETs safety applications have been proposed. Most of these applications use multi-hop broadcasting communications to disseminate safety information as far as needed in zones of relevance. A wide variety...

Vehicular Ad hoc networks ( ) must overcome a myriad of security issues to realize their potential. VANETs are latest research area in network field. are deployed in un-trusted and unsecured environments. Consequently, authentication i s a fo rerunner to a ny secur e interactions in these networks. In this paper, survey of VANETs Authentication is d i s c u s s e d . Different discussed. This w...

In VANETs the trade off between energy efficiency and throughput is one of the main constraints since the medium is time varying wireless channel. In this work we introduce fragmented transmission scheme in to VANETs that improve the energy efficiency pursuing high throughput. In existing systems contention window and back off stage is adapted according to mobility of vehicular node. Along with...

Simple flooding, probabilistic approach, area-based scheme, knowledge-based approach and Multi hop Vehicular broadcast is not suitable for VANETs scenario because of its dynamic nature. Relevance scheme is proposed to disseminate the relevant message for sharing in VANETs and discards the redundant messages from the network and improves the over all performance of network. The relevance-based a...

Vehicular Ad-hoc Networks (VANETs) are an anticipated mobile ad-hoc system that allows communication between vehicles and roadside infrastructure to increase safety on the road. It is essential that this system is able to send fast and secure messages to prevent accidents. In this research, we apply the Ambiguous Multi-Symmetric Cryptographic (AMSC) primitive in four different models to vehicul...

Vehicular Ad-Hoc Networks (VANETs) will play an important role in Smart Cities and will support the development of not only safety applications, but also car smart video surveillance services. Recent improvements in multimedia over VANETs allow drivers, passengers, and rescue teams to capture, share, and access on-road multimedia services. Vehicles can cooperate with each other to transmit live...

In recent years, vehicle communications technologies and wireless networking technology are continuous development, when we use wireless communications to exchange information data, traffic will be more secure and convenient than that of the past.We describe the problem that characterizes the privacy of VANETs and proposes a new anonymous key mechanism with a system architecture based on biline...